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 Stomacosmethis perakensis (Crosse, 1879) Alycaeus perakensis Crosse, 1879: 206-208, pl. 12, fig. 7. Alycaeus (Orthalycaeus) perakensis - Moellendorff 1891 : 342. Alycaeus (Alycaeus) perakensis - Kobelt 1902 : 348. Alycaeus perakensis - Tielecke 1940 : 345; Foon and Liew 2017 : 56-59, figs 7S, 24, 31V. Type locality. "Buket Pondong, Perak". Material examined. Perak, Buket Pondong, MNHN-IM-2000-31793 (5 syntypes); Perak, NHMW 41007 (3 shells). Remarks. Protoconch glossy, without spiral lines; R1 with irregular, rather low ribs and very weak spiral striation in-between, but at the end of the region the ribs are more elevated, sharp; R2 very short, with alternating darker/thicker and lighter/narrower stripes which are somewhat elevated from the surface. Stomacosmethis roebeleni may be a subspecies of A. perakensis although we refrain from treating it as such without further evaluation.