Annotated checklist of the land snail fauna from southern Cambodia (Mollusca, Gastropoda) Author Sutcharit, Chirasak Animal Systematics Research Unit, Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand Author Thach, Phanara Inland Fisheries Research and Development Institute (IFReDI), Fisheries Administration, No. 86, Norodom Blvd., PO Box 582, Phnom Penh, Cambodia https://orcid.org/0000-0002-3659-6577 Author Chhuoy, Samol Inland Fisheries Research and Development Institute (IFReDI), Fisheries Administration, No. 86, Norodom Blvd., PO Box 582, Phnom Penh, Cambodia Author Ngor, Peng Bun Inland Fisheries Research and Development Institute (IFReDI), Fisheries Administration, No. 86, Norodom Blvd., PO Box 582, Phnom Penh, Cambodia & Wonders of the Mekong Project, c / o IFReDI, No. 86, Norodom Blvd., PO Box 582, Phnom Penh, Cambodia Author Jeratthitikul, Ekgachai Animal Systematics and Molecular Ecology Laboratory, Department of Biology, Faculty of Science, Mahidol University, Bangkok 10400, Thailand https://orcid.org/0000-0002-3477-9548 Author Siriwut, Warut Animal Systematics and Molecular Ecology Laboratory, Department of Biology, Faculty of Science, Mahidol University, Bangkok 10400, Thailand Author Srisonchai, Ruttapon Department of Biology, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand Author Ng, Ting Hui Lee Kong Chian Natural History Museum, Faculty of Science, National University of Singapore, 2 Conservatory Drive, Singapore 117377, Republic of Singapore https://orcid.org/0000-0002-5123-0039 Author Pholyotha, Arthit Animal Systematics Research Unit, Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand Author Jirapatrasilp, Parin Animal Systematics Research Unit, Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand https://orcid.org/0000-0002-5591-6724 Author Panha, Somsak Animal Systematics Research Unit, Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand somsak.pan@chula.ac.th text ZooKeys 2020 948 1 46 http://dx.doi.org/10.3897/zookeys.948.51671 journal article http://dx.doi.org/10.3897/zookeys.948.51671 1313-2970-948-1 20E7C61357714F328F6C44A7E84AFA68 52F291E3803D593EBF5741BFB13193FA Lagocheilus klobukowskii (Morlet, 1885) Figs 3A , 7A, B Cyclophorus klobukowskii Morlet, 1885[1884]: 391, 392, pl. 12, fig. 1. Type locality: Near the Kamchay rapids, around the Kebal-Remeas cave (Kampot-Hatien road); commonly found on mountains, in forests, up to Compong-Som, and on the banks of Tap-Cheang . Fischer 1973a : 46, 47. Lagocheilus klobukowskii : Inkhavilay et al. 2019 : 19, 20, figs 9b, c, 18c. Material examined. Locality no. 9: CUMZ-CM044 (7 shells), CUMZ-CM045 (12 specimens in ethanol). Locality no. 10: CUMZ-CM068 (3 specimens in ethanol). Locality no. 11: CUMZ-CM079 (2 shells). Locality no. 13: CUMZ-CM128 (3 shells), CM129 (53 specimens in ethanol; Fig. 3A ). Locality no. 17: CUMZ-CM137 (18 shells; Fig. 7A, B ). The snails were found to live on the ground among leaf litter and decaying wood, on tree trunks and limestone wall. Distribution. Cambodia and Laos ( Inkhavilay et al. 2019 ). Remarks. This species was described from "... grotte de Kebal-Remeas (route de Kampot a Hatien) ..." . We collected topotypic specimens that tend to have a variable shell colour from yellowish (Fig. 7A , see fig. 9b in Inkhavilay et al. 2019 for the syntype) to purplish-black (Fig. 7B ). This limestone associated species has a wide distribution from southern Cambodia to eastern Laos ( Inkhavilay et al. 2019 ). The snails are commonly found in montane forest, living on decaying wood, on tree trunks and exposed limestone. Figure 7. A, B Lagocheilus klobukowskii (Morlet, 1885) A yellowish morph and B purplish-black morph C Pupina crosseana Morlet, 1883 D Succinea tenuis Morelet, 1865 and E, F Hypselostoma benetuitum Vermeulen et al., 2019 E from locality no. 11 (type locality) and F from locality no. 17. Lagocheilus klobukowskii was originally placed in the genus Cyclophorus and later was transferred to the genus Lagocheilus (see Inkhavilay et al. 2019 ). The distinguishing characters from the genus Cyclophorus are a conic shell, an aperture thickened (not expanded), and a thick calcareous, multispiral and plate-like operculum, whereas Cyclophorus has a turbinate shell, a thick and expanded lip, and a corneous multispiral operculum.