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 kapayanensis ikanensis (Foon & Liew, 2017) Alycaeus ikanensis Foon & Liew, 2017: 41-43, figs 18, 31L. Type locality. "KTN 06 Gua Ikan, Kelantan ( 5°21'14"N , 102°01'33"E )". Remarks. Alycaeus ikanensis is similar to the other taxa described by Foon and Liew, which are treated here as subspecies of Stomacosmethis kapayanensis . The original description states that A. ikanensis is most similar to A. costacrassa and differs from that species in its smaller and more slender shell. Again, these traits are enough for subspecific distinction, and slight differences in size and shell shape are insufficient for differences at the species level.