Caecum sepimentum de Folin, 1868

Walter, Angelo Vannozzi & Renda, Walter, 2024, Sampling the depth: New data on the Caecidae (Mollusca, Gastropoda) from northeastern Papua New Guinea, Zoosystema 46 (14), pp. 327-347 : 330

publication ID	https://doi.org/10.5252/zoosystema2024v46a14
publication LSID	lsid:zoobank.org:pub:23D972D0-F573-429C-816B-F42AFF02D0B1
DOI	https://doi.org/10.5281/zenodo.12554864
persistent identifier	https://treatment.plazi.org/id/038F87DD-FF82-FFEC-202A-FD6D3B93C9CA
treatment provided by	Felipe (2024-06-26 14:40:18, last updated 2024-11-26 05:36:33)
scientific name	Caecum sepimentum de Folin, 1868
status

Treatment

Caecum sepimentum de Folin, 1868 View in CoL

( Fig. 2 View FIG A-D)

Caecum sepimentum de Folin, 1868b: 84 View in CoL , pl. 6, fig. 7. — Vannozzi 2023: 424 View Cited Treatment , fig. 2A-C and synonymy therein.

TYPE MATERIAL. — Lectotype. Mauritius • sh; Mauritius ; MNHN-IM-2000-24907 .

Paralectotypes. Mauritius • 20 sh; same data as for lectotype; MNHN-IM-2000-24908 .

TYPE LOCALITY. — Indian Ocean, Mauritius.

MATERIAL EXAMINED.— Papua New Guinea • 1 sh; Vitu Islands ; 4°37’S, 149°27’E; 615-647 m depth; 27.IX.2010; BIOPAPUA Stn DW3680; MNHN GoogleMaps • 4 sh; Off Bougainville; 5°02’S, 154°29’E; 615-632 m depth; 13.X.2010; BIOPAPUA Stn DW3754; MNHN GoogleMaps • 8 sh (3 juv); New Ireland; 2°44’S, 150°35’E; 240-305 m depth; 3.IX.2014; KAVIENG 2014 Stn DW4463; MNHN GoogleMaps • 3 sh; New Ireland; 2°43’S, 150°36’E; 140-214 m depth; 3.IX.2014; KAVIENG 2014 Stn DW4464; MNHN GoogleMaps • 2 sh; New Ireland; 2°43’S, 150°36’E; 90-228 m depth; 3.IX.2014; KAVIENG 2014 Stn DW4465; MNHN GoogleMaps • 7 sh (3 juv); New Ireland; 2°45’S, 150°37’E; 163-358 m depth; 3.IX.2014; KAVIENG 2014 Stn DW4470; MNHN GoogleMaps • 7 sh (4 juv); New Ireland; 2°28’S, 149°54’E; 272- 276 m depth; 5.IX.2014; KAVIENG 2014 Stn DW4486; MNHN. Philippines GoogleMaps • 5 sh; Mactan, Punta Engano ; beached; coll. WR .

DISTRIBUTION.— The whole IWP. From the east coast of Africa (Red Sea to eastern South Africa) to Maldives, Papua New Guinea, Philippines, Japan, Australia, New Caledonia, French Polynesia, Hawaii ( Kay 1979; Lightfoot 1992a; Hasegawa 2000; Albano & Pizzini 2011; Pizzini & Raines 2011; Pizzini et al. 2013; Vannozzi et al. 2015; Vannozzi 2017, 2019b, 2023; Blatterer 2019; unpublished data). Allochthonous to the Mediterranean Sea ( Pagli 2009; Ovalis & Mifsud 2014).

DIAGNOSIS. — Shell of average size for the genus, colourless or creamy, often with darker blotches. Protoconch planorbid, multispiral of c. 2 whorls. Teleoconch tubular, arched, with strong collabral rings. Early teleoconch conical, rings increasing in strength during the growth. Adult shell subcylindrical, evenly arched. Sculpture of c. 20 strong rings with a somewhat subtriangular outline. Aperture preceded by a swelling, ending with several concentric small rings. Microsculpture of fine longitudinal threads. Septum almost flat without mucro, lying below the cutting plane. Periostracum brownish. Operculum thick, terraced. Animal described by Vannozzi (2019b). Adult shell length c. 2.5 mm, protoconch size 375 µm.

REMARKS All deep-water (90-647 m depth) examined specimens are worn, confirming that this species is exclusive to shallow-water habitats. Freshly-collected specimens, known only from shallow water, often show a colour pattern of brown blotches ( Fig. 2C, D View FIG ).

References

ALBANO P. G. & PIZZINI M. 2011. - Notes on Caecidae (Mollusca: Gastropoda) from southern Mozambique, with the description of a new species. African Invertebrates 52 (1): 1 - 10. https: // doi. org / 10.5733 / afin. 052.0101

BLATTERER H. 2019. - Mollusca of the Dahab region (Gulf of Aqaba, Red Sea). Denisia 43: 1 - 480. https: // www. zobodat. at / pdf / DENISIA _ 0043 _ 0001 - 0480. pdf

FOLIN L. DE 1868 b. - Les rivages de l'Ile Maurice, in DE FOLIN L. & PERIER L. (eds), Les Fonds de la Mer 1, chap. 17: 82 - 88, pls 6, 9 - 11. https: // www. biodiversitylibrary. org / item / 108784

HASEGAWA T. 2000. - Caecidae, in OKUTANI T. (ed.), Marine Mollusks in Japan. Tokai University Press, Tokyo: 170 - 173.

KAY E. A. 1979. - Hawaiian Marine Shells. Reef and shore fauna of Hawaii. Section 4: Mollusca. Bernice P. Bishop Museum Special Publication 64 (4), 653 p. http: // hbs. bishopmuseum. org / pubs-online / pdf / sp 64 - 4. pdf

LIGHTFOOT J. 1992 a. - Hawaiian Caecidae. Hawaiian Shell News 40 (7): 1, 4 - 5. Reprinted in Of Sea & Shore 15 (3): 171 - 173. https: // storage. googleapis. com / conchology-general-images / images / ofseaandshore / pdfs / 15 - 3. pdf

OVALIS P. & MIFSUD C. 2014. - On the presence of Caecum sepimentum de ‰ olin, 1868 (Gastropoda: Caecidae) in the Mediterranean Sea. Triton 29: 3, 4.

PAGLI A. 2009. - Untitled, in ‰ orum Natura Mediterraneo. https: // www. naturamediterraneo. com / forum / topic. asp? TOPIC _ ID = 95634 (Last consultation on 4. X. 2023).

PIZZINI M. & RAINES B. 2011. - The Caecidae from ‰ rench Polynesia with description of eight new species (Caenogastropoda: Rissooidea). Bollettino Malacologico 47 (1): 23 - 46. https: // www. biodiversitylibrary. org / part / 190468

PIZZINI M., RAINES B. & VANNOZZI A. 2013. - The family Caecidae in the South-West Pacific (Gastropoda: Rissooidea). Bollettino Malacologico 49 (suppl. 10): 1 - 78. https: // www. biodiversitylibrary. org / part / 291987

VANNOZZI A., PIZZINI M. & RAINES B. 2015. - Revision of South African Caecidae (Mollusca: Gastropoda). African Invertebrates 56 (1): 99 - 136. https: // doi. org / 10.5733 / afin. 056.0109

VANNOZZI A. 2017. - The family Caecidae (Mollusca: Gastropoda) from the Central Philippines. Bollettino Malacologico 53 (2): 121 - 149. https: // www. biodiversitylibrary. org / item / 278548

VANNOZZI A. 2019 b. - The family Caecidae (Mollusca: Gastropoda) from northern Papua-New Guinea. Bollettino Malacologico 55 (1): 72 - 104.

VANNOZZI A. 2023. - The Caecidae from BIOMAGLO Expedition in the Mayotte-Glorieuses area (Mollusca, Gastropoda). Zoosystema 45 (12): 421 - 434. https: // doi. org / 10.5252 / zoosystema 2023 v 45 a 12

Figures

FIG. 2. — Caecum Fleming, 1813 species from deep-water stations from northeastern PNG: A, B, C. sepimentum de Folin, 1868 from Stn DW4463 (B: juvenile); C, D, C. sepimentum from Mactan, Philippines, beached (coll. WR); E-H, C. vertebrale Hedley, 1899 from Stn DW3754; I, J, C. japonicum (Habe, 1978) from Stn. DW4464; K, L, C. japonicum from Stn DW4463 (L, juvenile); M, C. inflatulum Vannozzi, 2017 from Stn DW4463; N, C. inflatulum from Kotok, Indonesia, beached (coll. WR). Scale bar: 1 mm, details not to scale.