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 Metalycaeus muciferus (Heude, 1885) Fig. 33 Alycoeus [sic] muciferus Heude, 1885: 96, pl. 24, figs 1, 1a. Alycaeus (Orthalycaeus) muciferus - Moellendorff 1886 : 171. Alycaeus helicodes Gredler, 1888: 365. Alycaeus expansus Heude, 1890: 129, pl. 38, fig. 2. syn. nov. Alycaeus (Chamalycaeus) muciferus - Kobelt and Moellendorff 1897 : 149; Kobelt 1902 : 359. Metalycaeus muciferus - Pall-Gergely et al. 2017 : 88-93, figs 58, 59, 60, 61 ( helicodes Gredler is a synonym). " Chamalycaeus " expansus - Pall-Gergely et al. 2017 : 105, fig. 69L. Type locality. "in ditione Tchen-k'eou" ( Alycoeus muciferus ); Pe-shang, Prov. Hunan ( A. helicodes ); "Tchen K'eou" ( A. expansus ). Material examined. China, Tchen-k'eou , MCZ 167230 (7 syntypes of A. muciferus ); Tchen-k'eou , China, Pe-shang, Hunan, leg. Fuchs, coll. Gredler, SMF 192225 (2 paralectotypes of A. helicodes , lectotype in the Franziskanergymnasium Bozen [Bolzano, Italy], designated by Zilch 1974 ); HMT-215a, syntype: labelled as lectotype of A. expansus deposited in IZCAS: Tchen-k'eou (Cheng-kou County, Chong-qing, China) (Fig. 33 ). Remarks. Protoconch conspicuously elevated from dorsal surface, its end with inconspicuous spiral striations; R1 with irregular, widely spaced ribs and fine spiral sculpture; R2 with dense, sharp, elevated ribs. No type specimens of Alycaeus expansus were reported in American museums ( Johnson 1973 ). We were not able to examine the types deposited in the Beijing Museum before the revision of Chinese Alycaeidae ( Pall-Gergely et al. 2017 ), but could do so now. The general shell shape, colour, sculpture, and the lengths and proportions of R2 and R3 agree with those of A. muciferus , which was described from the same type locality. Consequently, we move Alycaeus expansus to the synonymy of A. muciferus . Figure 33. Alycaeus expansus Heude, 1890, syntype (HMT-215a; synonym of Metalycaeus muciferus (Heude, 1885)). Photographs: Kaibaryer Meng.