taxonID	type	description	language	source
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	discussion	Remarks: San Martín et al. (2008) transferred this species from Eusyllis Malmgren, 1867 to Megasyllis San Martín, Hutchings, and Aguado, 2008.	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	discussion	Remarks: Aguado et al. (2008) described this species as Syllis multiannulata from Japan. San Martín et al. (2014) transferred this species to Megasyllis. Megasyllis nipponica (Imajima, 1966) * [JN: Midori-shirisu] Remarks: San Martín et al. (2014) transferred this species to Megasyllis. Myrianida dentalius (Imajima, 1966) * [JN: Kassyoku-shirisu] Remarks: Nygren (2004) transferred Autolytus (A.) dentalius Imajima, 1966, A. irregularis Imajima and Hartman, 1965, A. (A.) pentadentatus Imajima, 1966, and A. (A.) spinoculatus Imajima, 1966 to Myrianida Milne Edwards, 1845. Myrianida irregularis (Imajima and Hartman, 1964) * [JN: Karen-shirisu] Remarks: See M. dentalius. Myrianida pachycera (Augener, 1913) [JN: Kakimoto-shirisu] Myrianida pentadentatus (Imajima, 1966) * [JN: Moto-shirisu] Remarks: See M. dentalius. Myrianida spinoculatus (Imajima, 1966) * [JN: Toge-shirisu] Remarks: See M. dentalius. Nudisyllis tinihekea Knox and Cameron, 1970 * Ref: Aguado et al. (2008). Odontosyllis cucullata (McIntosh, 1908)	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Odontosyllis detecta Augener, 1913 [JN: Akaguro-shirisu] Odontosyllis fulgurans Imajima, 1966 [JN: Nanatsuha-shirisu] Odontosyllis globulocirrata Hartmann-Schröder, 1981 * Ref: Uchida (1988). Odontosyllis hyalina Grube, 1878 * Ref: Uchida (1988).	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Odontosyllis rubrofasciata Grube, 1878 * [JN: Himo-shirisu] Ref: Uchida (1988). Odontosyllis setoensis Imajima, 1966 [JN: Seto-shirisu]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Odontosyllis undecimdonta Imajima and Hartman, 1964 [JN: Kuroeri-shirisu] Opisthodonta morena Hartmann-Schröder, 1960 * Ref: Uchida (1988). Opisthodonta uraga Imajima, 1966 * [JN: Habahiro-shirisu] Opisthosyllis australis Augener, 1913 * Ref: Uchida (2002). Opisthosyllis brunnea Langerhans, 1879 [JN: Okuba-shirisu] Opisthosyllis corallicola Hartmann-Schröder, 1965 * Ref: Uchida (2008). Opisthosyllis japonica Imajima, 1966 [JN: Nihon-okuba-shirisu] Opisthosyllis longicirrata Monro, 1939 [JN: Higenagaokuba-shirisu] Opisthosyllis viridis Langerhans, 1879 [JN: Ibookuba-shirisy] Parasphaerosyllis ezoensis Imajima and Hartman, 1964 [JN: Ezohukuro-shirisu] Parasphaerosyllis indica Monro, 1937 * Ref: Uchida (1988). Parasphaerosyllis setoensis Imajima, 1966 [JN: Setohukuro-shirisu] Paraehlersia ehlersiaeformis (Augener, 1913) * Ref: Aguado et al. (2008). Paraehlersia ferrugina (Langerhans, 1881) * Ref: Uchida (1988). Paraproceraea tamana (Imajima, 1966) * [JN: Tamano-shirisu] Remarks: Nygren (2004) transferred this species from Autolytus Grube, 1850 to Paraproceraea Nygren, 2004. Pinosyllis magnifica Moore, 1906 Ref: Uchida (1995). Proceraea boreata (Imajima, 1966) [JN: Kita-shirisu] Proceraea cornuta Agassiz, 1863 [JN: Maru-shirisu] Proceraea kiiensis (Imajima, 1966) [JN: Yosuji-shirisu] Proceraea longicirrata (Imajima, 1966) [JN: Nagahige-shirisu] Proceraea longiplappeta (Imajima, 1966) [JN: Nagamizo-shirisu] Proceraea misakiensis (Imajima, 1966) [JN: Tsuruhige-shirisu] Proceraea mukaishimensis (Imajima, 1966) [JN: Mukaishima-shirisu] Proceraea okadai (Imajima, 1966) [JN: Hutasuji-shirisu] Proceraea prismatica (Fabricius, 1780) [JN: Misuji-shirisu] Proceraea setoensis (Imajima, 1966) [JN: Mitsukado-shirisu] Proceraea vulgaria (Imajima, 1966) [JN: Nani-shirisu] Ramisyllis kingghidorahi Aguado, Ponz-Segrelles, Glasby, Ribeiro, Jimi, and Miura in Aguado, Ponz-Segrelles, Glasby, Ribeiro, Nakamura, Oguchi, Omori, Kohtsuka, Fischer, Ise, Jimi, and Miura, 2022 * [JN: Kingugidora-shirisu] Salvatoria clavata (Claparède, 1863) * [JN: Hosote-shirisu] Remarks: San Martín and Nishi (2003) transferred this species from Syllis Lamarck, 1818 to Salvatoria McIntosh, 1885. Sphaerosyllis capensis Day, 1953 * Ref: Ohwada (1988). Sphaerosyllis hirsuta Ehlers, 1897	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	[JN: Jyuzu-shirisu] Syllides papillosa Hartmann-Schröder, 1960 * Ref: Uchida (1988). Syllis amica Quatrefages, 1865 [JN: Hitoge-shirisu] Syllis armillaris (O. F. Müller, 1771) * Ref: Aguado et al. (2008). Syllis cornuta (Rathke, 1843) [JN: Kenaga-shirisu]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Syllis fasciata (Malmgern, 1867) [JN: Mono-shirisu] Syllis gracilis Grube, 1840 [JN: Hutamata-shirisu] Syllis japonica Imajima, 1966 [JN: Nihon-kenaga-shirisu] Syllis marugani Aguado, San Martín, and Nishi, 2006 * Syllis pectinans Haswell, 1920 * Ref: Aguado et al. (2008).	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Ref: Aguado et al. (2008).	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	[JN: Karakusa-shirisu] Syllis rosea (Langerhans, 1879) [JN: Okute-kenaga-shirisu]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Trypanedenta taeniaformis (Haswell, 1866) [JN: Shima-shirisu] Trypanobia asterobia (Okada, 1933) [JN: Sunahitode-shirisu] Trypanobia depressa (Augener, 1913) [JN: Kuroshima-shirisu]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Trypanosyllis (Trypanosyllis) coeliaca nipponica Imajima and Hartman, 1964 [JN: Hirahime-shirisu] Typosyllis aciculata Treadwell, 1945 * Ref: Mukai (2006). Typosyllis aciculata orientalis Imajima and Hartman, 1964 [JN: Kasuri-shirisu] Typosyllis adamanteus kurilensis Chlebovitsch, 1959 [JN: Shiromadara-shirisu] Typosyllis alternata (Moore, 1908) [JN: Moore-shirisu] Typosyllis armillaris (O. F. Müller, 1771) Typosyllis cornuta (Rathke, 1843) Typosyllis ehlersioides Marenzeller, 1890 [JN: Ehler-shirisu] Typosyllis hyalina (Grube, 1863) [JN: Hutoakasuji-shirisu] Typosyllis lunaris Imajima, 1966 [JN: Buchi-shirisu] Typosyllis maculata Imajima, 1966 [JN: Kurohushi-shirisu] Typosyllis monilata Imajima, 1966 [JN: Kurokubi-shirisu] Typosyllis okadai (Fauvel, 1934) [JN: Okada-shirisu] Typosyllis prolifera (Krohn, 1852) [JN: Okabuto-shirisu] Typosyllis regulata Imajima, 1966 [JN: Onaji-shirisu] Typosyllis rosea (Langerhans, 1879) Typosyllis setoensis Imajima, 1966 [JN: Higebuto-shirisu] Typosyllis variegata (Grube, 1860) [JN: Tora-shirisu] Virchowia japonica (Imajima and Hartman, 1964) * [JN: Hutoude-shirisu] Remarks: Nygren (2004) transferred this species from Autosyllis Imajima and Hartman, 1964 to Virchowia Langerhans, 1879. Tomopteridae Grube, 1850 Tomopteris (Johnstonella) apsteini Rosa, 1908	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	discussion	Remarks: Hartman (1959) synonymized T. elegans Chun, 1887 with T. (J.) pacifica. Tomopteris septentrionalis Steenstrup, 1849 [JN: Onashi-oyogigokai] Typhloscolecidae Uljanin, 1878	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Sagitella kowalewskii Wagner, 1872 [JN: Yamushigokai] Travisiopsis lobifera Levinsen, 1885 * Ref: Uschakov (1957). Typhloscolex muelleri Busch, 1851 Spintheridae Augener, 1913 Spinther ericinus Yamamoto and Imajima, 1985 [JN: Kita-hireashigokai] Spinther japonicus Imajima and Hartman, 1964 [JN: Toge-hireashigokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Oenonidae Kinberg, 1865 Arabella iricolor (Montagu, 1904) [JN: Seguroisome]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Ref: Iwase et al. (1990).	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Drilonereis filum (Claparède, 1868)	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	[JN: Akamushi] Notocirrus japonicus (Okuda, 1939) [JN: Harigu-isome] Oenone fulgida (Savigny, 1818) [JN: Hime-akamushi]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	[JN: Akasuji-isome] Dorvillea rubrovittata (Grube, 1855) [JN: Maruatama-isome] Dorvillea similis (Crossland, 1924) [JN: Oome-isome] Iphitime doederleini Marenzeller, 1902 [JN: Mino-isome] Remarks: Recent molecular phylogenetic studies indicated Iphitime Marenzeller, 1902 is congeneric with Ophryotrocha Claparède and Mecznikow, 1869 (e. g., Wiklund et al. 2009). Ophryotrocha japonica Paxton and Åkesson, 2010 *	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	discussion	Remarks: Sudzuki and Sekiguchi (1972) reported this species from Japan as O. labronica La Greca and Bacci, 1962 without any establishment of subspecies. Subsequently, Paxton and Åkesson (2007) described this subspecies from Japan. Ophryotrocha notoglandulata Pfannenstiel, 1972 *	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Ophryotrocha urbis Jimi, Taru, and Imura, 2019 * [JN: Namiuchi-komochi-koisome]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Papillidorvillea gardineri (Crossland, 1924) [JN: Kobuhana-isome] Protodorvillea gracilis (Hartman, 1938) Protodorvillea kefersteini Pettibone, 1961 [JN: Nagahige-isome] Schistomeringos anoculata Jumars, 1974 [JN: Nagaude-isome] Schistomeringos caeca (Webster and Benedict, 1884) [JN: Jitte-isome] Schistomeringos japonica (Annenkova, 1937) [JN: Nihon-koisome] Schistomeringos rudolphi (Delle Chiaje, 1828) [JN: Rudolph-isome] Eunicidae Berthold, 1827 Eunice aequabilis Grube, 1878 [JN: Huhen-isome] Eunice afra Peters, 1854 [JN: Konbou-isome] Eunice afra paupera Grube, 1878 [JN: Okuteera-isome]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Eunice annulicirrata Miura, 1986 [JN: Jyuzuki-isome] Eunice annulicornis Johnston, 1865 [JN: Jyuzukuro-isome] Eunice antennata (Lamarck, 1818) [JN: Jyuzu-isome] Eunice aphroditois (Pallas, 1788) [JN: Oni-isome] Eunice australis Quatrefages, 1866 [JN: Minami-isome]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Eunice dilatata Grube, 1877 [JN: Chugata-isome] Eunice fauchaldi Miura, 1986 [JN: Fauchald-isome] Eunice fauveli Gravier, 1900 [JN: Hikari-isome]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Eunice gracilicirrata (Treadwell, 1922) [JN: Nagaito-isome] Eunice indica Kinberg, 1865 [JN: Yaribusuma] Eunice japonica Fauchald, 1992 [JN: Hosomi-isome]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Eunice laticeps Ehlers, 1868 [JN: Unmon-isome] Eunice longicirris Grube, 1869 [JN: Chiriera-isome] Eunice masudai Miura, 1986 [JN: Masuda-isome]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	[JN: Misaki-isome]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	[JN: Kunojikuda-isome] Eunice petersi Fauchald, 1992 [JN: Tosaka-isome] Eunice profunda Miura, 1987	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Eunice tanseiae Miura, 1986 [JN: Tansei-isome] Eunice tibiana (Pourtalès, 1863)	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Eunice vittata (Delle Chiaje, 1828) [JN: Oshare-isome] Eunice yamamotoi Miura, 1986 [JN: Yamamoto-isome]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Lysidice ninetta Audouin and Milne-Edwards, 1833 [JN: Shibori-isome] Marphysa bifurcata Kott, 1951 [JN: Hutamata-iwamushi] Marphysa depressa (Schmarda, 1861) [JN: Hosonagaeramushi] Marphysa macintoshi Crossland, 1903 [JN: Maru-iwamushi] Marphysa mortenseni Monro, 1928 [JN: Mortenmushi] Marphysa sanguinea (Montagu, 1815) [JN: Iwamushi] Remarks: Abe et al. (2019 a) indicated that previous records of “ M. sanguinea ” from Japan are doubtful.	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Marphysa victori Lavesque, Daffe, Bonifácio, and Hutchings, 2017 * Ref: Lavesque et al. (2020). Nematonereis hebes Verrill, 1900 [JN: Hana-isome] Nematonereis unicornis (Grube, 1840) [JN: Hitomoto-isome] Nicidion cariboea (Grube, 1865) Nicidion cincta Kinberg, 1865 [JN: Higeera-isome] Palola siciliensis (Grube, 1840) [JN: Himo-isome] Paucibranchia bellii (Audouin and Milne-Edwards, 1833) * [JN: Momiagemushi] Remarks: Molina-Acevedo (2018) transferred Marphysa bellii, M. conferta Moore, 1911, M. kinbergi McIntosh, 1910, and M. stragulum (Grube, 1878) to Paucibranchia Molina-Acevedo, 2018. Paucibranchia conferta (Moore, 1911) * Remarks: See P. bellii. Paucibranchia disjuncta (Hartman, 1961) Paucibranchia kinbergi (McIntosh, 1910) * [JN: Kinberumushi] Remarks: See P. bellii. Paucibranchia stragulum (Grube, 1878) * Remarks: See P. bellii. Hartmaniellidae Imajima, 1977 Hartmaniella erecta Imajima, 1977 Lumbrineridae Schmarda, 1861 Augeneria bidens (Ehlers, 1887) [JN: Hutamata-giboshiisome] Augeneria polytentaculata Imajima and Higuchi, 1975 [JN: Husa-giboshiisome]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Errano bifrons Kinberg, 1865 [JN: Wasekagi-giboshiisome]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	[JN: Tsukushi-giboshiisome] Lumbrinerides dayi Perkins, 1979 * [JN: Day-giboshiisome] Remarks: Lumbrinerides hayashii Imajima, 1985 was synonymized with this species by Miura (2017).	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	[JN: Shimoda-giboshiisome] Remarks: Lumbrinerides bidentatus Imajima, 1985 and L. lineatus Imajima, 1895 in Imajima (2001) were identified as this species in Miura (2017).	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Lumbrineriopsis tsushimaensis Imajima and Higuchi, 1975 [JN: Tsushima-giboshiisome] Lumbrineris amboinensis (Grube, 1877) [JN: Ambon-giboshiisome]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Lumbrineris flabellicola (Fage, 1936) Lumbrineris higuchiae Carrera-Parra, 2006 Lumbrineris imajimai Carrera-Parra, 2006 Lumbrineris inflata Moore, 1911 [JN: Tama-giboshiisome]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Lumbrineris latreilli (Audouin and Milne-Edwards, 1834) [JN: Hutsu-giboshiisome] Lumbrineris nishii Carrera-Parra, 2006 Lumbrineris sphaerocephala Imajima and Higuchi, 1975 [JN: Hutoashi-giboshiisome] Lumbrineris tetraura (Schmarda, 1861) Ninoe japonica Imajima and Higuchi, 1975 [JN: Nihon-era-giboshiisome]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	[JN: Shinkai-giboshiisome] Scoletoma fragilis (O. F. Müller, 1776) [JN: Habahiro-giboshiisome] Scoletoma longifolia (Imajima and Higuchi, 1975) [JN: Katamagari-giboshiisome] Scoletoma nipponica (Imajima and Higuchi, 1975) [JN: Koashi-giboshiisome]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	[JN: Motonaga-isome] Onuphis fuscata Imajima, 1986 [JN: Akasuji-isome]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Onuphis iridescens (Johnson, 1901)	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Onuphis longisetosa Imajima, 1986 [JN: Kenaga-isome]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Onuphis nonpectinata Imajima, 1986 [JN: Kushinashi-isome] Onuphis opalina (Verrill, 1873) [JN: Hutsu-isome] Onuphis rullieriana (Amoureux, 1977) * Ref: Maekawa and Hayashi (1989).	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Onuphis shirikishinaiensis (Imajima, 1960) [JN: Kita-isome]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Onuphis tetradentata Imajima, 1986 [JN: Sanriku-isome]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	discussion	Remarks: This species was originally described by Imajima (1999) as Notonuphis abyssalis. Subsequently, Budaeva and Fauchald (2011) synonymized Notonuphis Kucheruk, 1978 with Paradiopatra Ehlers, 1887.	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	1875) * [JN: Erakumade-isome] Remarks: Imajima (1999) synonymized R. brevicornuta Moore, 1903 from Japan with this species. Rhamphobrachium (S.) hutchingsae Paxton, 1986 [JN: Kumade-isome] Orbiniidae Hartman, 1942 Califia calida Hartman, 1957 Leitoscoloplos bifurcatus Day, 1977 Leitoscoloplos pugettensis (Pettibone, 1957) [JN: Naga-hokomushi] Naineris dendritica (Kinberg, 1867)	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Naineris uncinata Hartman, 1957 Phylo felix Kinberg, 1866 Phylo fe. asiaticus Wu, 1962	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Phylo nudus (Moore, 1911) Protoariciella australiensis Hartmann-Schröder, 1981 * Ref: Uchida (2008). Scoloplos armiger (O. F. Müller, 1776) [JN: Yoroi-hokomushi] Scoloplos a. alaskensis (Hartman, 1948) * Ref: Imajima (1988). Scoloplos similis Mackie, 1987 Scoloplos (Leodamas) robustus (Kinberg, 1866) Scoloplos (L.) rubra (Webster, 1879) Paraonidae Cerruti, 1909 Aricidea (Acmira) catherinae Laubier, 1967 * Ref: Imajima (2009). Aricidea (A.) cerrutii pacifica Imajima, 1973 [JN: Konbou-himeeragokai] Aricidea (A.) eximia Imajima, 1973 [JN: Sankaku-himeeragokai] Aricidea (A.) foliata Imajima, 1973 [JN: Nagaera-himeeragokai] Aricidea (A.) horikoshii Imajima, 1973 [JN: Horikoshi-himeeragokai] Aricidea (A.) pacifica (Hartman, 1944) [JN: Hukuro-himeeragokai] Aricidea (A.) simplex Day, 1963 [JN: Bouzu-himeeragokai] Aricidea (A.) trilobata Imajima, 1973 [JN: Kizami-himeeragokai] Aricidea (A.) wassi Pettibone, 1965 Aricidea (Strelzovia) antennata Annenkova, 1934 * [JN: Tsuruhige-himeeragokai] Remarks: Aguirrezabalaga (2012) transferred this species to the subgenus Strelzovia Aguirrezabalaga, 2012.	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	discussion	Remarks: Aguirrezabalaga (2012) transferred this species to the subgenus Strelzovia. Aricidea (S.) elongata Imajima, 1973 * [JN: Nagaera-himeeragokai] Remarks: Aguirrezabalaga (2012) replaced Allia Strelzov, 1973 with Strelzovia due to its junior homonym with the lepidopteran genus-group name Allia Walker, 1868. Aricidea (S.) hartleyi Blake, 1996 [JN: Komachi-himeeragokai] Aricidea (S.) suecica Eliason, 1920 * Remarks: Strelzov (1979) synonymized A. uschakowi Zachs, 1925 with this species. Cirrophorus branchiatus Ehlers, 1908 [JN: Muchi-himeeragokai] Cirrophorus miyakoensis Imajima, 1973 [JN: Miyako-himeeragokai] Levinsenia gracilis (Tauber, 1879) [JN: Ito-himeeragokai] Levinsenia g. japonica Imajima, 1973 [JN: Togari-himeeragokai] Paradoneis lyra (Southern, 1914) [JN: Hutaeda-himeeragokai] Paradoneis nipponica (Imajima, 1973) [JN: Nihon-himeeragokai] Apistobranchidae Mensnil and Caullery, 1898 Apistobranchus ornatus Hartman, 1965 [JN: Kazari-hagurumagokai] Apistobranchus tullbergi (Théel, 1879) [JN: Tosaka-hagurumagokai] Longosomatidae Hartman, 1944 Heterospio longissima Ehlers, 1875	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Poecilochaetidae Hannerz, 1956	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Poecilochaetus koshikiensis Miura, 1988 [JN: Koshiki-tokkurigokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Spionidae Grube, 1850 Aonidella cirrobranchiata Day, 1961 Aonidella dayi Maciolek in López-Jamar, 1989 [JN: Heragata-supio] Aonides oxycephala (M. Sars, 1862) [JN: Kensaki-supio] Atherospio aestuarii Abe and Kan, 2022 * Boccardia perata (Khlebovich, 1959) * Ref: Sato-Okoshi (2000). Boccardia polybranchia (Haswell, 1885) Boccardia proboscidea Hartman, 1940 [JN: Tokiwa-supio] Boccardia pseudonatrix Day, 1961 * Ref: Abe et al. (2019 b) reported this species from Japan. This species is considered to be a potential alien species (Abe et al. 2019 b). Boccardiella hamata (Webster, 1879) [JN: Kaginote-supio] Boccardiella ligerica (Ferribbuere, 1898)	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Ref: Sato-Okoshi (1999). Dipolydora alborectalis (Radashevsky, 1993) * Ref: Sato-Okoshi (1999). Dipolydora armata (Langerhans, 1880) Dipolydora bidentata (Zachs, 1933) * Ref: Sato-Okoshi et al. (1990). Dipolydora cardalia (Berkeley, 1927) * Ref: Sato-Okoshi (2000). Dipolydora carunculata Radashevsky, 1993 * Dipolydora concharum (Verrill, 1880) * Ref: Mori et al. (1985). Dipolydora flava orientalis (Imajima and Hartman, 1964) Dipolydora giardi (Mesnil, 1896) * Ref: Kojima and Imajima (1982). Dipolydora socialis (Schmarda, 1861) * Ref: Sato-Okoshi (2000). Dipolydora trilobata (Radashevsky, 1993) * Dispio oculata Imajima, 1990 [JN: Hotei-supio] Dispio uncinata Hartman, 1951 [JN: Yajiri-supio] Laonice cirrata (M. Sars, 1851) Malacoceros indicus (Fauvel, 1928) [JN: Tsuno-supio] Microspio mecznikowianus (Claparède, 1869) * Ref: Okuda (1937 b). Paraprionospio coora Wilson, 1990 [JN: Subesube-haneera-supio]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Polydora cornuta Bosc, 1802 * Ref: Sato-Okoshi (2000). Polydora curiosa Radashevsky, 1994 * Ref: Sato-Okoshi (1999). Polydora glycymerica Radashevsky, 1993 * Ref: Sato-Okoshi (1999). Polydora hoplura Claparède, 1868 * Remarks: Sato-Okoshi (1998) reported P. uncinata Sato-Okoshi, 1998 from Japan. Subsequently, Sato-Okoshi et al. (2017) synonymized P. uncinata with P. hoplura.	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	discussion	Remarks: Malan et al. (2020) reported this species which previously identified as P. haswelli Blake and Kudenov, 1978 in Japan (e. g., Sato-Okoshi and Abe 2013). Polydora onagawaensis Teramoto, Sato-Okoshi, Abe, Nishitani, and Endo, 2013 *	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Polydora tunicola Abe, Hoshino, and Yamada in Abe, Hoshino, Yamada, Ogino, Kawaida, and Sato-Okoshi, 2022 * [JN: Hoya-no-poridora] Polydora websteri Hartman, 1943 * Ref: Kojima and Imajima (1982). Polydorella dawydoffi Radashevsky, 1996 * Ref: Yamada and Hoshino (2014). Prionospio (Aquilaspio) convexa Imajima, 1990 [JN: Bingata-supio] Prionospio (A.) grossa Imajima, 1990 [JN: Tengu-supio] Prionospio (A.) krusadensis Fauvel, 1929 [JN: Mitsubane-supio] Prionospio (A.) sexoculata Augener, 1918 [JN: Hutaera-supio] Prionospio (Minuspio) elegantula Imajima, 1990 [JN: Nagaera-supio]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Prionospio (M.) multibranchiata Berkeley, 1927 [JN: Magata-supio] Prionospio (Minuspio) pulchra Imajima, 1990 [JN: Itoera-supio] Prionospio anuncata Fauchald, 1972 [JN: Hitoeranaga-supio] Prionospio aucklandica Augener, 1923 * Ref: Nishi and Kupriyanova (2011). Prionospio bocki Söderström, 1920 [JN: Sudare-supio] Prionospio caspersi Laubier, 1962 [JN: Mimi-supio]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Prionospio depauperata Imajima, 1990 [JN: Sodenaga-supio] Prionospio dubia Day, 1961 [JN: Oka-supio] Prionospio ehlersi Fauvel, 1928 [JN: Ehler-supio] Prionospio lineata Imajima, 1990 [JN: Yakko-supio] Prionospio membranacea Imajima, 1990 [JN: Eritate-supio] Prionospio oshimensis Imajima, 1990 [JN: Oshima-supio] Prionospio paradisea Imajima, 1990 [JN: Maku-supio] Prionospio steenstrupi Malmgren, 1867 Prionospio tridentata Blake and Kudenov, 1978 [JN: Sankaku-supio] Prionospio variegata Imajima, 1990 [JN: Beni-supio] Pseudopolydora achaeta Radashevsky and Hsieh, 2000 * [JN: Toraoni-supio] Ref: Abe et al. (2016). Pseudopolydora kempi japonica Imajima and Hartman, 1964 [JN: Dorooni-supio] Pseudopolydora paucibranchiata (Okuda, 1937) [JN: Kooni-supio]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	[JN: Hiroha-supio] Rhynchospio glutaea (Ehlers, 1897) [JN: Hige-supio] Rhynchospio tuberculata Imajima, 1991 [JN: Shumoku-supio] Scolelepis (Parascolelepis) geniculata Imajima, 1992 [JN: Koshiorimaku-supio] Scolelepis (P.) texana Foster, 1971 [JN: Chigiremaku-supio] Scolelepis (P.) yamaguchii (Imajima, 1959) [JN: Yamaguchi-maku-supio] Scolelepis (Scolelepis) branchia Imajima, 1992 [JN: Era-supio] Scolelepis (S.) kudenovi Hartmann-Schröder, 1981 [JN: Togari-supio] Scolelepis (S.) lefebvrei (Gravier, 1905) [JN: Eboshi-supio] Scolelepis (S.) lingulata Imajima, 1992 [JN: Shitadashi-supio] Scolelepis (S.) planata Imajima, 1992 [JN: Hirata-supio] Scolelepis (S.) sagittaria Imajima, 1992 [JN: Yamushi-supio] Scolelepis (S.) variegata Imajima, 1992 [JN: Akaten-supio] Spio arndti Meissner, Bick, and Bastrop, 2011 * Ref: Abe et al. (2019 c).	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	discussion	Remarks: Ohwada (1988) reported Sp. pacifica Blake and Kudenov, 1978 from Japan. Maciolek (1990) redescribed and replaced the name to Sp. blakei because the name was preoccupied by Sp. martinensis pacifica Berkeley, 1927. Spio borealis Okuda, 1937 [JN: Kita-supio] Spio filicornis (O. F. Müller, 1776) [JN: Madoka-supio] Spio kurilensis Buzhinskaya, 1990 * [JN: Chishima-supio] Ref: Abe et al. (2019 c). Spio unidentata Chlebovitsch, 1959 * [JN: Homura-supio] Ref: Abe et al. (2019 c). Spiophanes berkeleyorum Pettibone, 1962 * Ref: Imajima and Takeda (1975).	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Spiophanes bombyx (Claparède, 1870) [JN: Eranashi-supio] Spiophanes cirrata M. Sars, 1872 Spiophanes japonicum Imajima, 1991 [JN: Nihoneranashi-supio] Spiophanes kroyeri Grube, 1860 [JN: Suzueranashi-supio] Spiophanes wigleyi Pettibone, 1962 [JN: Tsuriganeeranashi-supio] Streblospio benedicti japonica Imajima, 1990 [JN: Hosoeritate-supio] Tripolydora spinosa Woodwick, 1964 * Ref: Uchida (2008).	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	discussion	Remarks: Radashevsky et al. (2018) discussed about synonymization of Trochochaetidae with Spionidae.	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Cirratulidae Ryckholt, 1851 Aphelochaeta monilaris (Hartman, 1960) * Ref: Imajima (1994). Aphelochaeta multifilis (Moore, 1909) * Ref: Kawabe (1975). Caulleriella apicula Blake, 1996 * Ref: Yamada (2009). Caulleriella hamata (Hartman, 1948) * Ref: Imajima (2006). Cirratulus cirratus (O. F. Müller, 1776) [JN: Chigusa-mizuhiki] Cirratulus longicephalus Imajima, 1964 Cirratulus robustus Johnson, 1901 * Ref: Yamada (2009). Cirriformia abyssalis Jimi, Fujiwara, and Kajihara, 2024 * [JN: Hukaba-mizuhiki] Cirriformia afer (Ehlers, 1908) * Ref: Uchida (1968). Cirriformia akiyoae Jimi, Fujiwara, and Kajihara, 2024 * [JN: Akiyo-mizuhiki] Cirriformia capensis (Schmarda, 1861) * Ref: Imajima (1980).	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	discussion	Remarks: Marenzeller (1879) described C. comosa from Japan. After Imajima and Hartman (1964 b), the species was taxonomically confused and often misidentified with C. tentaculata (Montagu, 1808) (type locality: England) (e. g., Imajima 2006). Petersen (1999) considered C. comosa was valid without any reason. This confusion should be solved with examinations of type specimens of C. comosa and a topotype of C. tentaculata. Cirriformia ogasawaraensis Jimi, Fujiwara, and Kajihara, 2024 * [JN: Ogasawara-mizuhiki] Cirriformia okudai Jimi, Fujiwara, and Kajihara, 2024 * [JN: Iso-mizuhiki] Cirriformia petersenae Jimi, Fujiwara, and Kajihara, 2024 * [JN: Higata-mizuhiki] Cirriformia posterotentaculata Jimi, Fujiwara, and Kajihara, 2024 * [JN: Ushiro-mizuhiki] Cirriformia ryukyuensis Jimi, Fujiwara, and Kajihara, 2024 * [JN: Okinawa-mizuhiki] Cirriformia satoi Jimi, Fujiwara, and Kajihara, 2024 * [JN: Doro-mizuhiki] Cirriformia saxatilis (Gravier, 1906) Remarks: Imajima (1980) reported this species from Japan. Cirriformia saxicola Jimi, Fujiwara, and Kajihara, 2024 * [JN: Iwa-mizuhiki] Cirriformia septentrionalis Jimi, Fujiwara, and Kajihara, 2024 * [JN: Kita-mizuhiki] Chaetozone abranchiata (Hansen, 1878) Remarks: Moore (1903) reported this species from Japan. Chaetozone setosa Malmgren, 1867	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	[JN: Nihon-kushiitogokai] Ctenodrilus serratus (Schmidt, 1857) * [JN: Kushiitogokai] Ref: Sudzuki and Sekiguchi (1972). Dodecaceria concharum Örsted, 1843 * Ref: Imajima (1980). Dodecaceria fistulicola Ehlers, 1901 Dodecaceria laddi Hartman, 1954 * Ref: Uchida (2008). Kirkegaardia annulosa (Hartman, 1965) * Ref: Hayashi (1983). Kirkegaardia tesselata (Hartman, 1960) * Ref: Imajima (1997 b). Protocirrineris antarctica (Monro, 1930) Protocirrineris chrysoderma (Claparède, 1868) Raphidrilus misakiensis Jimi, Fujimoto, Fujiwara, Oguchi, and Miura, 2022 * [JN: Misaki-era-kushiitogokai] Raphidrilus okinawaensis Jimi, Fujimoto, Fujiwara, Oguchi, and Miura, 2022 * [JN: Okinawa-era-kushiitogokai] Raricirrus anubis Jimi, Fujimoto, Fujiwara, Oguchi, and Miura, 2022 * [JN: Hakamori-kushiitogokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Timarete japonica Zachs, 1933 *	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	discussion	Remarks: Iwasaki et al. (2004) reported this species as an invasive species. Timarete punctata (Grube, 1859) * [JN: Madara-mizuhiki] Ref: Iwase et al. (1990). Cossuridae Day, 1963	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Cossura coasta Kitamori, 1960 Cossura duplex Tamai, 1986 Cossura pygodactylata Jones, 1956 Fauveliopsidae Hartman, 1971 Fauveliopsis antri Jimi in Jimi, Fujimoto, Ogawa, Fujita, Shigenobu, and Imura, 2020 * [JN: Doukutsu-yadokari-imomushi-gokai] Fauveliopsis challengeriae McIntosh, 1922 Fauveliopsis glabra (Hartman, 1960) Laubieriopsis brevis japonica Imajima, 2009 Laubieriopsis hartmanae (Levenstein, 1970) Laubieriopsis soyoae Jimi in Jimi, Fujimoto, Ogawa, Fujita, Shigenobu, and Imura, 2020 * [JN: Soyo-sube-imomushi-gokai] Laubieriopsis verrucosa Jimi, Hookabe, Fujimoto, Kise, Ogawa, and Tsuchiya, 2023 * [JN: Ibo-sube-imomushi-gokai] Siboglinidae Caullery, 1914 * Lamellibrachia columna Southward, 1991 * [JN: Sagami-haorimushi] Remarks: Kobayashi et al. (2015) described L. sagami Kobayashi, Miura, and Kojima, 2015 from Japan. McCowin et al. (2019) synonymized L. sagami with L. columna based on genetic evidences.	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Oligobrachia mashikoi Imajima, 1973 * [JN: Mashiko-higemushi] Osedax japonicus Fujikura, Fujiwara, and Kawato, 2006 * [JN: Honekuihanamushi] Acrocirridae Banse, 1969 Acrocirrus heterochaetus Annenkova, 1934 * Ref: Imajima (2009).	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Actaedrilus yanbarensis Jimi, Fujimoto, and Imura, 2020 * [JN: Chibi-kumanoasitsuki] Flabelligeridae Saint-Joseph, 1894 Brada inhabilis (Rathke, 1843) Brada kudenovi Salazar-Vallejo, 2017 * [JN: Kudenov-zunguri-habouki] Remarks: Jimi and Imura (2020) observed the single specimen of B. granulata Malmgren, 1867 sensu Imajima (2009), and identified it as this species. Bradabyssa nuda (Annenkova, 1922) Bradabyssa ochotensis (Annenkova, 1922) Bradabyssa sachalina (Annenkova, 1922) Buskiella vitjasi (Buzhinskaja, 1977) [JN: Shinkai-uneri-ukimushi]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	discussion	Remarks: Jimi et al. (2023) described this species and regarded “ Daylithos parmatus (Grube, 1877) ” from Japan as this species.	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Diplocirrus asamushiensis Jimi, Fujiwara, and Kajihara, 2017 * [JN: Asamushi-bouzu-habouki] Diplocirrus imajimai Jimi, Fujiwara, and Kajihara, 2017 * [JN: Imajima-bouzu-habouki] Diplocirrus mamoi Jimi, Fujiwara, and Kajihara, 2017 * [JN: Mamo-bouzu-habouki] Diplocirrus nicolaji (Buzhinskaja, 1994) * [JN: Bouzu-habouki] Ref: Jimi et al. (2016). Diplocirrus ohtsukai Jimi, Fujiwara, and Kajihara, 2017 * [JN: Ohtsuka-bouzu-habouki] Diplocirrus seisuiae Jimi, Fujiwara, and Kajihara, 2017 * [JN: Seisui-bouzu-habouki] Diplocirrus tohokuensis Jimi, Fujiwara, and Kajihara, 2017 * [JN: Tohoku-bouzu-habouki] Diplocirrus toyoshioae Jimi, Fujiwara, and Kajihara, 2017 * [JN: Toyoshio-bouzu-habouki] Lamispina ammophila Jimi and Kajihara, 2018 * [JN: Suna-sasanoha-habouki] Lamispina miurai Higashida, Jimi, and Kajihara, 2020 * [JN: Miura-sasanoha-habouki]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Piromis suni Salazar-Vallejo, 2011 * Poeobius meseres Heath, 1930 [JN: Ukinagamushi] Semiodera nishii Salazar-Vallejo, 2012 * Stylarioides longisetosa (Haswell, 1892)	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Petersenaspis capillata (Nonato, 1966) * [JN: Tsubutsubumarii-darumagokai] Ref: Mukai and Miura (2016). Petersenaspis palpallatoci Sendall and Salazar-Vallejo, 2013 * [JN: Kubomimarii-darumagokai] Ref: Mukai and Miura (2016). Sternaspis affinis Stimpson, 1864 * [JN: Gotaba-darumagokai] Ref: Mukai and Miura (2016).	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Sternaspis islandica Malmgren, 1867 * [JN: Kirekomi-darumagokai] Ref: Mukai and Miura (2016). Sternaspis scutata (Ranzani, 1817) * [JN: Subesube-umidaruma] Ref: Mukai and Miura (2016). Sternaspis thalassemoides Otto, 1821 * [JN: Tsubushiwa-umidaruma] Ref: Mukai and Miura (2016). Arenicolidae Johnston, 1835 Abarenicola claparedi oceanica (Healy and Wells, 1959) [JN: Bouzuiso-tamashikigokai] Abarenicola pacifica Healy and Wells, 1959 [JN: Iso-tamashikigokai] Arenicola brasiliensis Nonato, 1958 [JN: Tamashikigokai] Arenicola cristata Stimpson, 1856 Branchiomaldane simplex (Berkeley and Berkeley, 1932) [JN: Hime-tamashikigokai] Capitellidae Grube, 1862 Barantolla orientalis Yabe and Mawatari, 1998 [JN: Chouyou-itogokai] Capitella capitata (Fabricius, 1780) [JN: Nami-itogokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Capitella minima Langerhans, 1880 [JN: Hime-itogokai] Capitella teleta Blake, Grassle, and Eckelbarger, 2009 Capitellethus cinctus Thomassin, 1970 [JN: Madaraobi-itogokai] Dasybranchus glabrus Moore, 1909 [JN: Bouzu-itogokai] Dasybranchus lumbricoides Grube, 1878 [JN: Amigasa-itogokai] Heteromastus filiformis (Claparède, 1864) Heteromastus similis Southern, 1921 [JN: Hoso-itogokai] Heteromastus tohbaiensis Yabe and Mawatari, 1998 Leiocapitella glabra Hartman, 1947 [JN: Hartman-itogokai] Leiochrides australis Augener, 1914 [JN: Zunguri-itogokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Axiothella quadrimaculata Augener, 1914 [JN: Rappa-takehushigokai] Axiothella rubrocincta (Johnson, 1901) [JN: Orochi-takehushigokai] Chirimia biceps (M. Sars, 1861) * [JN: Hutamizo-takehushigokai] Remarks: Light (1991) transferred this species from Asychis Kinberg, 1867 to Chirimia Light, 1991.	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Clymenella complanata Hartman, 1969 [JN: Nichirin-takehushigokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Clymenopsis cingulata (Ehlers, 1887) [JN: Hitoera-takehushigokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	discussion	Remarks: Read (2011) concluded that subgeneric classification of Clymenura Verrill, 1900 by Imajima and Shiraki (1982) is unworkable, because the accuracy of the taxonomic characters used in Imajima and Shiraki (1982) is deemed to be unreliable. See Read (2011) for the detail explanation. Clymenura columbiana Berkeley, 1929 [JN: Marutate-takehushigokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Euclymene oerstedii (Claparède, 1863) [JN: Jyougo-takehushi]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	[JN: Karakasa-takehushigokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	discussion	Remarks: Read (2011) transferred this species from Clymenura to Leiochone Grube, 1868. Maldane cristata Treadwell, 1923 [JN: Hoso-takehushigokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Maldanella harai (Izuka, 1902) [JN: Hanabira-takehushigokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Metasychis gotoi (Izuka, 1902) * [JN: Goto-takehushigokai] Remarks: Light (1991) transferred this species from Asychis to Metasychis Light, 1991.	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Nicomache (Loxochona) quadrispinata Arwidsson, 1906 [JN: Yotsutoge-takehushigokai] Nicomache (Nicomache) minor (Arwidsson, 1906) [JN: Kita-takehushigokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	[JN: Uzumaki-takehushigokai] Nicomache ohtai Miura and Hashimoto, 1991 [JN: Shinkai-takehushigokai] Nicomache personata Johnson, 1901 [JN: Shirosuzi-takehushigokai] Notoproctus pacificus (Moore, 1906) [JN: Hirata-takehushigokai] Petaloproctus borealis Arwidsson, 1906 [JN: Hiragutsu-takehushigokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Praxillella affinis (M. Sars, 1872)	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Praxillella gracilis (M. Sars, 1861) [JN: Nagahana-takehushigokai] Praxillella pacifica Berkeley, 1929 [JN: Nagao-takehushigokai] Praxillella praetermissa (Malmgren, 1866) [JN: Urizane-takehushigokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Opheliidae Malmgren, 1867	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Armandia lanceolata Willey, 1905 Armandia melanura Gravier, 1905 * [JN: Kurojiri-ophelia] Ref: Iwase et al. (1990). Armandia simodaensis Takahashi, 1938 [JN: Gapen-ophelia] Ophelia limacina (Rathke, 1843) Ophelina acuminata Örsted, 1843 * Remarks: Records of Ophelina aulogaster (Rathke, 1843) in Japan (e. g., Imajima and Hartman 1964 b) were based on misidentification of this species. Ophelina arctica (McIntosh, 1879) * Ref: Imajima (2009). Ophelina breviata (Ehlers, 1913) * Ref: Imajima (2009). Polyophthalmus pictus (Dujardin, 1839) [JN: Kasuri-ophelia] Thoracophelia arcticus Grube, 1866 * [JN: Sakura-ophelia] Remarks: KANSO (2018) listed this species as Euzonus articus Grube, 1866. Actually, however, Blake (2011) indicated Euzonus Grube, 1866 is a junior homonym of the diplopod Euzonus Menge, 1854, and thus proposed Thorachophelia Blake, 2011 as a replacement name for Euzonus Grube.	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Travisiidae Hartmann-Schröder, 1971	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Ref: Levenstein (1970).	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Travisia glandulosa McIntosh, 1879 * Ref: Levenstein (1970). Travisia japonica Fujiwara, 1933 [JN: Nippon-ophelia] Travisia kerguelensis intermedia Annenkova, 1937 * Ref: Imajima (2001).	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Travisia pupa Moore, 1906 * Ref: Levenstein (1970). Travisia sanrikuensis Kobayashi and Kojima, 2021 * Scalibregmatidae Malmgren, 1867 Asclerochelius beringianus Uschakov, 1955 * Ref: Imajima (2009). Hyboscolex longiseta Schmarda, 1861 Ref: Uchida and Hirano (1996). Hyboscolex pacificus borealis Imajima and Hartman, 1964 * Remarks: Day (1967) synonymized Oncoscolex Schmarda, 1861 with Hyboscolex Schmarda, 1861. Parasclerochelius branchiatus Fauvel, 1928 * [JN: Kiboshi-tonosamagokai] Ref: Uchida (1992). Polyphysia caulleryi (McIntosh, 1922)	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Scalibregma inflatum Rathke, 1843 [JN: Tonosamagokai] Nerillidae Levinsen, 1883 * Nerilla mediterranea Schlieper, 1925 * [JN: Chibi-mukashigokai] Ref: Uchida (1979). Nipponerilla irabuensis Worsaae, Hansen, and Fujita in Worsaae, Hansen, Axelsen, Kakui, MØller, Osborn, Martínez, Gonzalez, Miyamoto, and Fujimoto, 2021 * [JN: Irabu-doukutsu-usamimi-gokai] Dinophilidae Macalister, 1876 * Dimorphilus gyrociliatus (O. Schmidt, 1857) * [JN: Akame-hirata-mukashigokai] Ref: Sudzuki and Sekiguchi (1972).	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Ref: Uchida and Okuda (1943). Diurodrilidae Kristensen and Niilonen, 1982 * Diurodrilus kunii Kajihara, Ikoma, Yamasaki, and Hiruta, 2019 * Parergodrilidae Reisinger, 1925 * Stygocapitella budaevae Cerca, Meyer, Purschke, and Struck, 2020 * [JN: Kita-sunaito-gokai] Ref: Hookabe et al. (2024).	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Polygordiidae Czerniavsky, 1881	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Polygorgius pacificus Uchida, 1935 [JN: Yurine-mukashigokai] Protodrilidae Hatschek, 1888 * Protodrilus puniceus Sato-Okoshi, Okoshi, and Fujiwara, 2015 [JN: Hiiro-mukashigokai] Saccocirridae Czerniavsky, 1881 Pharyngocirrus krusadensis (Alikuhni, 1948) * [JN: Hime-mukashigokai] Ref: Uchida (1992). Pharyngocirrus labilis (Yamanishi, 1973) * [JN: Nihon-mukashigokai] Remarks: Domenico et al. (2014) established Pharyngocirrus Domenico, Martínez, Lana, and Worsaae, 2014, and transferred this species and Saccocirrus uchidai Sasaki, 1981 to the genus. Pharyngocirrus uchidai (Sasaki, 1981) * Oweniidae Rioja, 1917 Galathowenia oculata (Zachs, 1923) * Remarks: Kirkegaard (1983) transferred the species from Myriochele Malmgren, 1867 to Galathowenia Kirkegaard, 1959. Galathowenia scotiae (Hartman, 1978) * Remarks: Imajima (2009) identified Japanese specimens of “ Galathowenia wilsoni ” as this species. Myriochele danielsseni Hansen, 1879 [JN: Daniel-chimakigokai] Myriochele heeri Malmgren, 1867 [JN: Bouzu-chimakigokai] Myrioglobula japonica Imajima and Morita, 1987 [JN: Nihon-chimakigokai] Owenia fusiformis Delle Chiaje, 1842 [JN: Chimakigokai] Owenia gomsoni Koh and Bhaud, 2001 * Ref: Nishi et al. (2004 a). Alvinellidae Desbruyères and Laubier, 1986 * Paralvinella hessleri Desbruyères and Laubier, 1989 * [JN: Mariana-itoeragokai] Ref: Miura and Ohta (1991). Ampharetidae Malmgren, 1866 Amage arienticorunta Moore, 1923 * Ref: Imajima (2006). Amage auricula Malmgren, 1866 [JN: Amage-gokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	[JN: Kubinaga-kazarigokai] Ampharete acutifrons (Grube, 1860) [JN: Hari-kazarigokai] Ampharete ampullata Imajima, Reuscher, and Fiege, 2012 [JN: Tokkuri-kazarigokai] Ampharete arctica Malmgren, 1866 Ampharete cinnamomea Imajima, Reuscher, and Fiege, 2012 [JN: Hitosuji-kazarigokai] Ampharete cornuta (Hilbig, 2000) [JN: Kanmuri-kazarigokai] Ampharete falcata Eliason, 1955 [JN: Toge-kazarigokai] Ampharete finmarchica (M. Sars, 1864) [JN: Habahiro-kazarigokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Ampharete orientalis (Annenkova, 1929) [JN: Touyou-kazarigokai] Amphicteis gunneri (M. Sars, 1835) [JN: Kazarigokai] Amphicteis mederi Annenkova, 1929 [JN: Kumade-kazarigokai] Amphicteis posterobranchiata Fauvel, 1932 [JN: Zuriera-kazarigokai] Amphicteis scaphobranchiata Moore, 1906 [JN: Kobuera-kazarigokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Amphisamytha bioculata (Moore, 1909) [JN: Zunguri-kazarigokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Anobothrus dayi Imajima, Reuscher, and Fiege, 2013 [JN: Minami-kazarigokai] Anobothrus fimbriatus Imajima, Reuscher, and Fiege, 2013 [JN: Husakuchi-kazarigokai] Anobothrus flabelligerulus Imajima, Reuscher, and Fiege, 2013 [JN: Uchiwa-kazarigokai] Anobothrus gracilis (Malmgren, 1866) [JN: Katayose-kazarigokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Auchenoplax crinita Ehlers, 1887 [JN: Haraashi-kazarigokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Glyphanostomum pallescens (Théel, 1879) [JN: Hoso-kazarigokai] Hobsonia florida (Hartman, 1951) * Ref: Uchida (2009). Isolda pulchella F. Müller in Grube, 1858 * [JN: Kagi-kazarigokai] Ref: Iwase et al. (1990). Lysippe fragilis (Wollebaek, 1912) [JN: Yawa-kazarigokai] Lysippe labiata Malmgren, 1866	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Melinna cristata (M. Sars, 1851) [JN: Kamatsume-kazarigokai] Melinna elisabethae McIntosh, 1914 [JN: Kagitsume-kazarigokai] Melinna oculata Hartman, 1969 * Ref: Imajima (2006). Melinnampharete gracilis Hartman, 1969 [JN: Erimaki-kazarigokai] Melinnexis arctica Annenkova, 1931 * Ref: Imajima (2005).	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Ref: Reuscher et al. (2015).	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Ref: Reuscher et al. (2015).	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Ref: Imajima (2015). Neosabellides elongatus (Ehlers, 1913) [JN: Onaga-kazarigokai] Neosabellides oceanica (Fauvel, 1914) [JN: Kotsubu-kazarigokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Paramage scutata (Moore, 1923) [JN: Tsuppari-kazarigokai] Paramphicteis angustifolia (Grube, 1878) * [JN: Heraera-kazarigokai] Remarks: This species reported from Japan by Reuscher et al. (2014). According to Reuscher et al. (2014), “ Amphicteis angustifolia ” from Japan in the previous reports (e. g., Marenzeller 1884) should be identified as P. weberi (Caullery, 1944). Paramphicteis weberi (Caullery, 1944) * [JN: Hutoera-kazarigokai] Remarks: See P. angustifolia.	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Samythella neglecta Wollebaek, 1912 [JN: Sudare-kazarigokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Schistocomus sovjecticus Annenkova, 1937 [JN: Kataberi-kazarigokai] Sosane brevibranchiata Imajima, Reuscher, and Fiege, 2013 [JN: Himeera-kazarigokai] Sosane occidentalis (Hartman, 1969) * Ref: Imajima (2006). Sosane sulcata Malmgren, 1866 [JN: Hutohude-kazarigokai] Sosane trigintaduo Imajima, Reuscher, and Fiege, 2013 [JN: Shiha-kazarigokai] Sosane uebelackerae Imajima, Reuscher, and Fiege, 2013 [JN: Kaen-kazarigokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Tanseimaruana boninensis Imajima, Reuscher, and Fiege, 2013 [JN: Munin-kazarigokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Zatsepinia rittichae Jirkov, 1986 [JN: Hutaera-kazarigokai] Terebellidae Johnston, 1846 Amaeana trilobata (M. Sars, 1863) Amphitrite cirrata O. F. Müller, 1771 [JN: Obana-husagokai] Amphitrite edwardsii (Quatrefages, 1865)	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Ref: Okuda (1937 a). Artacama proboscidea Malmgren, 1866 * Ref: Imajima (2009).	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Eupolymnia nebulosa (Montagu, 1818) Eupolymnia triloba (Fischli, 1900) * Ref: Iwase et al. (1990). Lanice conchilega (Pallas, 1766) [JN: Ganzeki-husagokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Lanice socialis (Wiley, 1905)	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	[JN: Oochinchiro-husagokai] Ref: Iwase et al. (1990). Loimia medusa (Savigny in Quatrefages, 1865) [JN: Chinchiro-husagokai] Loimia montagui (Grube, 1878) Loimia ochracea (Grube, 1878) * Ref: Uchida (2008). Loimia verrucosa Caullery, 1944 * [JN: Chinchiro-husagokai (?)] Remarks: Iwase et al. (1990) reported this species from Japan. Similar to this species, the Japanese name “ Chinchiro-husagokai ” has also been applied to L. medusa.	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Nicolea gracilibranchis (Grube, 1878) Nicolea sinensis Fauvel, 1917 * Ref: Nishi et al. (2004 b). Nicolea venustula (Montagu, 1818) * Ref: Uchida and Hirano (1996). Nicolea zostericola (Örsted, 1844) * Ref: Imajima (2009).	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Ref: Imajima (2006).	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Pista brevibranchiata Moore, 1923 * Remarks: Leontovich and Jirkov (2011) concluded that P. fasciata (Grube, 1869) sensu Imajima and Hartman (1964 b) is P. brevibranchiata. They also synonymized P. shizugawaensis Nishi and Tanaka, 2006 with this species. Pista cristata (O. F. Müller, 1776) Pista elongata Moore, 1909 [JN: Nagaera-husagokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Polycirrus aoandon Jimi in Jimi, Bessho-Uehara, Nakamura, Sakata, Hayashi, Kanie, Ohmiya, Tsuyuki, Ota, Woo, and Ogoh, 2023 * [JN: Aoandon-husagokai] Polycirrus ikeguchii Jimi in Jimi, Bessho-Uehara, Nakamura, Sakata, Hayashi, Kanie, Ohmiya, Tsuyuki, Ota, Woo, and Ogoh, 2023 * [JN: Ikeguchi-husagokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	[JN: Onibi-husagokai] Reteterebella queenslandia Hartman, 1963 * [JN: Kawari-husagokai] Remarks: Iwase et al. (1990).	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	discussion	Remarks: Imajima (2009).	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Ref: Nishi et al. (2001). Streblosoma bairdi (Malmgren, 1866) * Ref: Imajima (2009).	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Terebella ehrenbergi Grube, 1870 [JN: Hanasaki-husagokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Ref: Hessle (1917). Thelepus setosus (Quatrefages, 1866) [JN: Nippon-husagokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Trichobranchidae Malmgren, 1866	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Terebellides horikoshii Imajima and Williams, 1985 [JN: Hutokubi-tamagushihusagokai] Terebellides intoshi Caullery, 1915 [JN: Intoshi-tamagushihusagokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Terebellides lineata Imajima and Wiliams, 1985 [JN: Hoso-tamagushihusagokai] Terebellides stroemii M. Sars, 1835 [JN: Tamgushihusagokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Pectinariidae Quatrefages, 1866 Amphictene hokkaido Nishi, Tomioka, Jimi, Fujiwara, and Kupriyanova, 2024 [JN: Ezo-umiisagomushi] Amphictene japonica (Nilsson, 1928) [JN: Nihon-umiisagomushi] Cistenides granulata (Linneaus, 1767) Cistenides hyperborea Malmgren, 1866 [JN: Kita-umiisagomushi]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Lagis koreni Malmgren, 1866 * Ref: Okuda (1936). Pectinaria aegyptia (Savigny, 1822) Pectinaria belgica (Pallas, 1766) * Ref: Kitamori (1965).	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Pectinaria okudai (Imajima and Hartman, 1964) * [JN: Okuda-umiisagomushi] Remarks: Nishi et al. (2014) transferred this species to Pectinaria Lamarck, 1818 from Cistenides Malmgren, 1866.	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Tachikawa, and Kupriyanova, 2010 * Sabellaria tottoriensis Nishi, Kato, and Hayashi, 2004 * Fabriciidae Rioja, 1925 Fabricia sabella (Ehrenberg, 1837) Fabricinuda bikinii (Hartman, 1954) * Ref: Nishi (1996 b). Fabriciola rubra Fitzhugh, 1998 * Pseudoaugeneriella unirama Fitzhugh, 1998 * Sabellidae Latreille, 1825 Acromegalomma acrophthalmos (Grube, 1878) * [JN: Oome-keyari] Ref: Uchida (1992).	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	discussion	Remarks: Imajima and Takeda (1975) reported this species from Japan. Gil and Nishi (2017) concluded that this species was a taxon inquirendum with the following explanation “ The fact that the holotype has dried out and that the species has a remote type locality have likely prevented a formal redescription. ” Acromegalomma quadrioculatum (Willey, 1905) * [JN: Minami-oomekeyari] Ref: Iwase et al. (1990). Acromegalomma vesiculosum (Montagu, 1815) * Ref: Imajima (2006). Amphicornia ascidicola Yoshihara, Hiruta, Katoh, and Kajihara, 2012 *	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Amphicornia ezoensis Yoshihara, Hiruta, Katoh, and Kajiahra, 2012 * Amphicornia mobilis (Rouse, 1990) * Ref: Yoshihara et al. (2012). Amphiglena nishii Capa and Rouse, 2007 * [JN: Uron-keyarimushi] Bispira crassicornis M. Sars, 1851 * Ref: Johansson (1927). Bispira melanostigma Schmarda, 1861 * Ref: Johansson (1927). Bispira porifera (Grube, 1878) * [JN: Himehon-keyarimushi] Ref: Iwase et al. (1990).	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	[JN: Murakumo-keyari]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Chone duneri Malmgren, 1867 * Ref: Johansson (1927). Chone ecaudata (Moore, 1923) * Ref: Imajima (2006). Chone filicaudata Southern, 1914 * Ref: Imajima and Takeda (1975). Chone gracilis Moore, 1906 * Ref: Imajima (2009). Chone infundibuliformis KrØyer, 1856 * Ref: Okuda (1934). Chone magna (Moore, 1923) * Ref: Imajima (2009). Chone mollis (Busch in Moore, 1904) * [JN: Kubiwa-keyari] Ref: Uchida (1992). Claviramus kyushuensis Nishi, Tanaka, and Tovar-Hernández, 2019 * Desdemona ornata Banse, 1957 * Ref: Yamanishi et al. (1998).	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Euchone analis (KrØyer, 1856) * Ref: Imajima (2009). Euchone capensis Day, 1961 * Ref: Imajima (2011). Euchone limnicola Reish, 1959 * Ref: Hayashi (1983). Hypsicomus lyra Moore and Bush, 1904 Hypsicomus phaeotaenia (Schmarda, 1861) [JN: Norikura-keyari] Jasmineira filatovae Levenstein, 1961 * Ref: Levenstein (1973).	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Laonome albicingillum Hsieh, 1995 * [JN: Higata-keyarimushi] Ref: Nishi et al. (2005). Laonome tridentata Moore and Bush, 1904 Myxicola infundibulum (Reiner, 1804) [JN: Routo-keyari] Notaulax phaeotaenia (Schmarda, 1861) * Ref: Nishi (2003).	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Ref: Nishi et al. (2009).	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	discussion	Remarks: Tovar-Hernández and Harris (2010) transferred Demonax albicans to Parasabella Bush, 1905.	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Parasabella fullo (Grube, 1878) * Parasabella japonica (Moore and Bush, 1904) Perkinsiana acuminata (Moore and Bush, 1904) * Remarks: Knight-Jones (1983) transferred Potamilla acuminata to Perkinsiana Knight-Jones, 1983. Potamilla paulina (Grube, 1868) Potamilla saxicava (Quatrefages, 1866) * [JN: Kumade-keyari] Ref: Uchida (1992). Potamilla torelli Malmgren, 1866	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Pseudopotamilla occelata Moore, 1905 [JN: Erako] Pseudopotamilla reniformis (Linneaus, 1788) Sabella fusca Grube, 1870 * [JN: Hon-keyarimushi] Ref: Uchida (1992).	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Sabellastarte spectabilis (Grube, 1878) [JN: Indo-keyari]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Spirographis tricyclia (Schmarda, 1861) * [JN: Katamaki-keyarimushi] Ref: Iwase et al. (1990). Serpulidae Rafinesque, 1815 Apomatus enosimae Marenzellr, 1884 Apomatus geniculatus (Moore and Bush, 1904) Bushiella arguta (Bush, 1904) Circeis spirillum (Linnaeus, 1758) [JN: Subekawa-uzumakigokai] Crucigera tricornis Gravier, 1906 [JN: Mitsuyubi-kanzashigokai] Crucigera zygophora (Johnson, 1901) [JN: Kubimagari-kanzashigokai] Dasynema chrysogyrus (Grube, 1876) * Ref: Nishi (1993 b). Ditrupa arietina (O. F. Müller, 1776) Ditrupa gracillima Grube, 1878 [JN: Tsunogaidamashi] Ficopomatus enigmaticus (Fauvel, 1923) [JN: Kaniyadori-kanzashi] Filograna implexa Berkeley, 1851 [JN: Shiraitogokai] Filogranella elatensis Ben-Eliahu and Dafni, 1979 * [JN: Oo-shiraitogokai] Ref: Iwase et al. (1990). Filogranula exilis Imajima, 1979 [JN: Hako-kanzashigokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Hydroides albiceps (Grube, 1870) [JN: Hukuro-kanzashigokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Hydroides brachyacantha Rioja, 1941 [JN: Hutomagari-kanzashigokai] Hydroides dianthus (Verrill, 1873) * Remarks: Link et al. (2009) reported this species from Japan. It is an alien species. Hydroides dirampha Mörch, 1863 [JN: Yaguruma-kanzashigokai] Hydroides elegans (Haswell, 1883) [JN: Kasane-kanzashigokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Hydroides exa. vesiculosus Fauvel, 1919 Hydroides externispina Straughan, 1967 [JN: Pengin-kanzashigokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Hydroides fusca Imajima, 1976 [JN: Kurotsuru-kanzashigokai] Hydroides fusicola Mörch, 1863 [JN: Hosotoge-kanzashigokai] Hydroides helmatus (Iroso, 1921) * Ref: Imajima (1987). Hydroides longispinosa Imajima, 1976 [JN: Nagatoge-kanzashigokai] Hydroides minax (Grube, 1878) [JN: Hanamagari-kanzashigokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Hydroides novaepommeraniae Augener, 1925 [JN: Tokkuri-kanzashigokai] Hydroides tambalagamensis Pillai, 1961 [JN: Ningyou-kanzashigokai] Hydroides tuberculata Imajima, 1976 [JN: Kinchaku-kanzashigokai] Janita fimbriata (Delle Chiaje, 1822) [JN: Owan-kanzashigokai] Josephella marenzelleri Caullery and Mesnil, 1896 [JN: Hirakago-kanzashi] Leodora coronata (Zachs, 1933) Leodora multiplata Uchida, 1971 Metavermilia acanthophora (Augener, 1914) [JN: Tsunohuchitori-kanzashigokai] Metavermilia gravitesta Imajima, 1978 [JN: Oyayubi-kanzashigokai] Metavermilia inflata Imajima, 1977 [JN: Fuusen-kanzashigokai] Metavermilia nates Zibrowius, 1971 [JN: Huchitori-kanzashigokai] Metavermilia ogasawaraensis Nishi, Kupriyanova, and Tachikawa, 2007 * Metavermilia ovata Imajima, 1978 [JN: Haradashi-kanzashigokai] Metavermilia spicata Imajima, 1977 [JN: Tsukushi-kanzashigokai] Metavermilia truncata Imajima, 1978 [JN: Tenjiku-kanzashigokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Neodexiospira brasiliensis (Grube, 1872) Remarks: Knight-Jones (1984) replaced Dexiospira Caullery and Mensnil, 1897 with Neodexiospira Pillai, 1970, as it was preoccupied by a protozoan genus Dexiospira Ehrenberg, 1858. Neodexiospira foraminosa (Bush, 1904) Neodexiospira pseudocorrugata (Bush, 1905)	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	discussion	Remarks: Knight-Jones and Knight-Jones (1977) synonymized P. nakamurai Uchida, 1971 with this species.	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	[JN: Nagare-kanzashi-damashi]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	discussion	Remarks: See Rzhavsky et al. (2010). Pileolaria pacifica (Uchida, 1971) *	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Placostegus tridentatus (Fabricius, 1780) [JN: Kizuchi-kanzashi] Pomatoceros auritubis Moore and Bush, 1904	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	[JN: Haguruma-kanzashigokai] Protula anomala Day, 1955 * Ref: Uchida (2008).	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	discussion	Remarks: ten Hove and Kupriyanova (2009) synonymized Paraprotula Uchida, 1978 with Protula Risso, 1826. Protula magnifica Straughan, 1967	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Protula tubularia (Mongagu, 1803) [JN: Nagare-kanzashi] Protula t. caeca Imajima, 1977 [JN: Daidainagare-kanzashi]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Ref: Nishi (1993 a).	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	discussion	Remarks: Ben-Eliahu and ten Hove (1989) synonymized Apomatolos Uchida, 1978 with Rhodopsis Bush, 1905. Salmacina amphidentata Jones, 1962 * Ref: Nishi (1993 a). Salmacina dysteri (Huxley, 1855) [JN: Sakibuto-kanzashigokai] Salmacina tribranchiata (Moore, 1923) * Ref: Nishi (1993 a). Semivermilia elliptica Imajima, 1978	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Serpula concharum Langerhans, 1880 * Ref: Uchida (1978). Serpula hartmanae Reish, 1968 [JN: Hartman-kanzashigokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	[JN: Toguro-kanzashigokai] Serpula jukesii Baird, 1865 * [JN: Hitoe-kanzashi] Ref: Marenzeller (1884). Serpula longituba (Imajima, 1979) * [JN: Hosonaga-kanzashigokai] Ref: ten Hove (1994) synonymized Semiserpula Imajima, 1979 with Serpula Linnaeus, 1758. Serpula oshimae Imajima and ten Hove, 1984 [JN: Oshima-kanzashigokai]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Serpula vittata Augener, 1914 [JN: Asagao-kanzashigokai] Serpula watsoni Willey, 1905 [JN: Watson-kanzashigokai] Simplaria pseudomilitaris (Thiriot-Quievreux, 1965) Spirorbella tricornigera Rioja, 1942 [JN: Tsuno-uzumakigokai] Spirobranchus akitsushima Nishi, Abe, Tanaka, Jimi, and Kupriyanova, 2022 * Spirobranchus corrugatus Straughan, 1967 * Ref: ten Hove and Nishi (1996). Spirobranchus decoratus Imajima, 1982 [JN: Togehana-kanzashi] Spirobranchus gaymardi (Quatrefages, 1866) * Ref: Nishi (2003). Spirobranchus corniculatus (Grube, 1862) [JN: Ibara-kanzashi]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Spirobranchus polytrema (Philippi, 1884) [JN: Hutakobu-kanzashi] Spirobranchus tetraceros (Schmarda, 1861) [JN: Mutsueda-kanzashigokai] Spirobranchus tricornis (Mörch, 1863) * Ref: Uchida (2008). Vermiliopsis infundibulum / glandigera species group [JN: Donguri-kanzashi] Vermiliopsis labiata (Costa, 1861) [JN: Chigire-kanzashigokai] Vermiliopsis pluriannulata (Moore and Bush, 1904) Asteriomyzostomidae Jägersten, 1940 Asteriomyzostomum hercules Jimi, Moritaki, and Kajihara, 2017 * [JN: Kanmurihitode-suikuchimushi] Asteriomyzostomum jinshou Jimi, Moritaki, and Kajihara, 2017 * [JN: Udenagagokakuhitode-suikuchimushi] Asteriomyzostomum monroeae Jimi, Moritaki, and Kajihara, 2017 * [JN: Himehitode-suikuchimushi]	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	discussion	Remarks: Summers and Rouse (2015) established the genus Eenymeenymyzostoma Summers and Rouse, 2015 with transferring this species to the genus. Endomyzostomatidae Perrier, 1897	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Endomyzostoma clarki (McClendon, 1906) Endomyzostoma deformator (Graff, 1884) Endomyzostoma robustum (Hara and Okada, 1921) Endomyzostoma orientale (McClendon, 1906) Myzostomatidae Benham, 1896 Remarks: See Imajima and Hartman (1964 b) for previous records. Mesomyzostoma katoi Okada, 1933 Mesomyzostoma okadai Rouse, Lanterbecq, Summers, and Eeckhaut, 2015 * Myzostoma ambiguum Graff, 1877 Myzostoma antennatum Graff, 1877	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Myzostoma brevicirrum Graff, 1877	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Myzostoma chelonoidium McClendon, 1906	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Ref: Clark (1921). Myzostoma elegans Graff, 1877 * Ref: Iwase et al. (1990). Myzostoma holotuberculatum Jägersten, 1940 Myzostoma insigne Atkins, 1927 Myzostoma japonica McClendon, 1906 Myzostoma lobata Graff, 1906 * [JN: Panda-suikuchimushi] Ref: Nishi et al. (2002).	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Myzostoma nigrescens Graff, 1884 Myzostoma polycyclus Atkins, 1927 * [JN: Mato-suikuchimushi] Ref: Uchida (1992). Myzostoma smithi McClendon, 1906 Myzostoma tentaculatum Jägersten, 1940	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
C22D87A9C12BFF9015C1FF2DFABDFE71.taxon	description	Myzostoma wheeleri McClendon, 1906 Notopharyngoides ijimai (Hara and Okada, 1921) [JN: Ijima-suikuchimushi] Notopharyngoides platypus (Graff, 1887) * Ref: Grygier and Nomura (1998). Protomyzostomidae Stummer-Traunfels, 1926 Protomyzostomum astrocladi Fedotov, 1925 Protomyzostomum sagamiense Okada, 1922	en	Jimi, Naoto (2024): The Polychaetous Annelids of Japan: Updated Checklist of Known Species. Species Diversity 29 (2): 337-377, DOI: 10.12782/specdiv.29.337, URL: https://doi.org/10.12782/specdiv.29.337
