Acicnemis sauteri Hubenthal, 1919

Lewis, Jake H., Kojima, Hiroaki & Campbell, Erin O., 2025, A Japan-focused review of East Asian Acicnemis Fairmaire, 1849 (Coleoptera, Curculionidae) reveals cryptic diversity in a well-studied region, ZooKeys 1259, pp. 103-167 : 103-167

publication ID	https://doi.org/10.3897/zookeys.1259.164450
publication LSID	lsid:zoobank.org:pub:EBA5ED95-FD65-42C6-8C7C-EFE17C1CEC77
DOI	https://doi.org/10.5281/zenodo.17574337
persistent identifier	https://treatment.plazi.org/id/5D5F21B1-AD66-5E6F-8067-88A6CA815813
treatment provided by	ZooKeys by Pensoft
scientific name	Acicnemis sauteri Hubenthal, 1919
status

Treatment

Acicnemis sauteri Hubenthal, 1919 View in CoL

Figs 1, 6O 1–6 View Figure 6 View Figure 1 , 2 View Figure 2 , 26 View Figure 26

Type material examined

( Japan: 21; Taiwan: 18; Total: 39). Lectotype (designated here). Taiwan • Hoozan , 1910, H. Sauter, bears a red label reading “ Typus ” and a new, red lectotype label reading “ LECTOTYPE / Acicnemis sauteri / Hubenthal, 1919 / Det. Lewis & Kojima, 2025 ”, SNSD, JHL_ACITAI_004 . Paralectotypes. Taiwan • Hoozan , “ 08–10 ”, Sauter (3, SDEI), bear a red label reading “ Syntypus ”, SDEI Muncheberg Col 18573, 18574, 18583 ; • Kosempo , Sauter (4, SDEI), bear a red label reading “ Syntypus ”, SDEI Muncheberg Col 18575, 18576, 18577, 18578 ; • Fuhosho , “ VIII- 09 ”, Sauter (3, SDEI), bear a red label reading “ Syntypus ”, SDEI Muncheberg Col 18580, 18581, 18582 ; • Taihorinsho , “ X- 09 ”, Sauter (1, SDEI), bears a red label reading “ Syntypus ”, SDEI Muncheberg Col 18579 .

Non-type material.

Taiwan • Lushan Wenchuan , Nantou Hsien, 6–7. VI. 1976, H. Makihara (2, KUM), JHL_AREV_609 , JHL_AREV_611 ; • Sun Moon Lake , Nantou Hsien, 6. XII. 2013, J. Aoki (10, KUM), JHL_SYN_148 (dissected male), JHL_SYN_149 (dissected male), JHL_AREV_613 – JHL_AREV_620 ; • Wukongshan , Liu-kuei, Kaohsiung Hsein, 2. V. 1996, H. Takizawa (1, HUM), JHL_ACITAI_085 ; Japan: Kagoshima Prefecture: • Nakanoshima Island , 25–30. IV. 1975, H. Irie (1, KUM), JHL_AREV_608 ; • Jinushi-daimyojin , Satomura, Nakano-jima Island, 7–9. VII. 2019, S. Imada (1, KUM), JHL_AREV_610 ; • Sato , Nakano-jima Island, 7–9. VII. 2019, N. Tsuji (3, KUM), JHL_AREV_691 – JHL_AREV_693 ; • Aden , Kikai-jima Island, 6. V. 2022, R. Ito (3, KUM), JHL_AREV_623 , JHL_AREV_908 , JHL_AREV_909 ; • Kikai-jima Island , 4. III. 2012, J. Aoki (1, KUM), JHL_AREV_695 ; • Torigamine, Amami-Oshima , 3. VIII. 1976, N. Morishima (1, LBM), LBM 5123 View Materials ; • Hatsuno, Amami-Oshima , 24–30. VI. 1973, M. Ito (1 dissected male, LBM), LBM 5132 View Materials ; • Sumiyo, Amami Oshima , 27. V. 2004, K. Takahashi (1, KUM), JHL_AREV_694 ; • Akuseki-jima Island, Ue-shuraku, Sakamori-jinja , 2–6. VII. 2019, S. Imada (1, KUM), JHL_DNA_121 (GenBank accession number: PV 255642 ) ; • Nakano-jima Island, Satomura, Jinushi-daimyojin , 7–9. VII. 2019, S. Imada (1, KUM), JHL_DNA_120 (GenBank accession number: PV 255641 ) .

Diagnosis.

Body length 4.9–6.2 mm. Covered in pale and dark brown scales, with two obliquely shaped white, black-bordered spots across middle of elytra. Pronotum lacking impunctate longitudinal midline (present in A. koguma ). Scutellum small, bordered by pale yellow scales, and weakly bare antero-dorsally (compare with A. kiotoensis which possesses a large, broad, bare scutellum). Odd and 2 nd elytral intervals with erect scales (4 th elytral interval also occasionally with 1–2 scales near white spot). Sclerolepidia indistinct, forming low, rounded, non-protruding tubercles. Third tarsomeres emarginate (as opposed to truncate, as in A. koguma ). Pedon with lateral edges approx. parallel in dorsal view, but converging in distal 1 / 2 evenly into a blunt point. Pedon elongate (pedon length / total aedeagus length including temo = 0.26). Internal sac protruding and unmodified in the posterior 1 / 2, but with roughened musculature in anterior 1 / 2 (Fig. 6 O 1 View Figure 6 – 2 View Figure 2 ).

Distribution.

This species occurs in southern Japan ( Kagoshima Prefecture) and Taiwan, and has also been recorded from South Korea ( Alonso-Zarazaga et al. 2023). The apparent lack of this species in the southern Ryukyu Islands (Okinawa Prefecture) is odd; however, similar patterns are known in other weevils (e. g., Aphanerostethus magnus Lewis & Kojima, 2024 )

Remarks.

This species is closely allied with A. maculaalba (see Remarks for that species). We designate one of Hubenthal’s syntypes ( SNSD, JHL _ACITAI_004 ) as a lectotype to fix the identity of this species.