Genus-level revision of the Alycaeidae (Gastropoda, Cyclophoroidea), with an annotated species catalogue Author Pall-Gergely, Barna Plant Protection Institute, Centre for Agricultural Research, Herman Otto ut 15, Budapest, H- 1022, Hungary https://orcid.org/0000-0002-6167-7221 pallgergely2@gmail.com Author Sajan, Sheikh Zoological Survey of India, Prani Vigyan Bhawan, M Block, New Alipore, Kolkata 700053, West Bengal, India & Wildlife Institute of India, Chandrabani, Dehradun 248 002, Uttarakhand, India https://orcid.org/0000-0002-2785-6824 Author Tripathy, Basudev Zoological Survey of India, Prani Vigyan Bhawan, M Block, New Alipore, Kolkata 700053, West Bengal, India Author Meng, Kaibaryer National Zoological Museum of China, Institute of Zoology, Chinese Academy of Sciences, Beijing, China Author Asami, Takahiro Department of Biology, Shinshu University, Matsumoto 390 - 8621, Japan https://orcid.org/0000-0001-5706-0272 Author Ablett, Jonathan D. Mollusca Section, Invertebrates Division, Department of Life Sciences, The Natural History Museums, London SW 7 5 BD, United Kingdom text ZooKeys 2020 981 1 220 http://dx.doi.org/10.3897/zookeys.981.53583 journal article http://dx.doi.org/10.3897/zookeys.981.53583 1313-2970-981-1 5194AAC86B8A473F8A41470A60182A0B 7C44C797C4125A71BAE032A55E6FA5DC Chamalycaeus excisus ( Moellendorff , 1887) Alycaeus excisus Moellendorff , 1887b: 287. Alycaeus (Chamalycaeus) excisus - Kobelt 1902 : 355. Chamalycaeus (Chamalycaeus) excisus - Zilch 1957 : 142, pl. 6, fig. 20. Chamalycaeus excisus excisus - Pall-Gergely and Auffenberg 2019 : 378, figs 2B, 3, 4C, D. Type locality. "Insel Bongao zwischen Sulu und Borneo" (from the title). Material examined. Sulu-Inseln, Insel Bongao (Tawi-Tawi-Gr.), leg. Moellendorff 1890, coll. O. Boettger, SMF 109479 (holotype [single adult specimen mentioned in the original description]); Same data, SMF 109480 (4 paratypes). Remarks. Protoconch elevated without spiral lines; R1 with weak, widely spaced, irregular ribs and somewhat stronger spiral striation; R2 relatively short, with widely spaced, elevated, sharp ribs.