Annotated checklist of the operculated land snails from Thailand (Mollusca, Gastropoda, Caenogastropoda): the family Pupinidae, with descriptions of several new species and subspecies, and notes on classification of Pupina Vignard, 1829 and Pupinella Gray, 1850 from mainland Southeast Asia Author Jirapatrasilp, Parin https://orcid.org/0000-0002-5591-6724 Animal Systematics Research Unit, Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand Author Sutcharit, Chirasak Animal Systematics Research Unit, Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand jirasak4@yahoo.com Author Panha, Somsak Animal Systematics Research Unit, Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand & Academy of Science, The Royal Society of Thailand, Bangkok 10300, Thailand somsak.pan@chula.ac.th text ZooKeys 2022 2022-08-25 1119 1 115 http://dx.doi.org/10.3897/zookeys.1119.85400 journal article http://dx.doi.org/10.3897/zookeys.1119.85400 1313-2970-1119-1 A3BE91C6B79344E1A886A803BF104D8B F158A7C5261D52B69288A62F3C777CAF Pseudopomatias caligosus Pall-Gergely & Hunyadi, 2018 Fig. 9A, B Pseudopomatias caligosus Pall-Gergely & Hunyadi, 2018b: 64, fig. 3. Type locality: Mae Hong Son Province, 9.1 km from Ban Soppong towards Mae Hong Son, left side of road # 1095, Thailand. Pall-Gergely and Grego 2019 : 588, fig. 2a-h, 169.5 km milestone, 36 km west towards Taungoo, Demoso, Kayah State, Myanmar. Type material examined. Holotype HNHM 100176 (Fig. 9A ) and paratypes HNHM 100442 (17 shells) from the type locality. Other material examined. CUMZ 12191 (1 shell; Fig. 9B ) from Pa Tham Wua Temple, Mueang Mae Hong Son District, Mae Hong Son Province, 18 Jan. 2015 . Diagnosis. Shell slender turriform; ca. 9 whorls, with regular strong ribs. Area between ribs with very fine spiral striation mostly on upper whorls. Peristome reflected. Differential diagnosis. Pseudopomatias caligosus is most similar to P. peguensis (Theobald, 1864) and P. shanensis Pall-Gergely , 2015 in shell size and bulging whorls, but different from P. peguensis by a less glossy shell, much stronger ribs, and a reflected peristome, and different from P. shanensis by more bulging whorls, a less expanded peristome, and less-packed ribs with indistinct spiral striation between them ( Pall-Gergely et al. 2015 ; Pall-Gergely and Hunyadi 2018b ). Distribution. Mae Hong Son Province and Kayah State, Myanmar ( Pall-Gergely and Hunyadi 2018b ; Pall-Gergely and Grego 2019 ). Remarks. Although the apex of the CUMZ specimen is broken, the other remaining characters conform to those of the holotype of P. caligosus . The collecting locality is in the same vicinity as the type locality.