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 Anceyoconcha chaudoensis (Rochebrune, 1881) Figs 5F , 12E, F Petraeus chaudoensis Rochebrune, 1881a: 70. Type locality: Montagnes de Chaudoe Cambodge [Chau Doc, An Giang Province, Vietnam]. Ena chaudocensis [sic]: Fischer 1973b : 90. Material examined. Locality no. 1: CUMZ-CM003 (20 shells; Fig. 12E, F ), CUMZ-CM005 (1 specimen in ethanol; Fig. 5F ). Locality no. 2: CUMZ-CM007 (9 shells). Locality no. 3: CUMZ-CM010 (1 specimen in ethanol). The snails were found to live on tree trunks and leaves. Distribution. Cambodia ( Fischer 1973b ). Remarks. This species was originally described from "Montagnes de Chaudoe Cambodge" [Chau Doc, An Giang Province, Vietnam] probably in the area bordering Cambodia and Vietnam. The original description of this species was brief and without illustration. This species has a sinistral elongate conic to slightly ovate conic shell, with 7 to 9 whorls, which increase regularly; cylindrical, having convex whorl and wide and impressed suture. The shell surface possesses fine growth lines, and the periostracum is thin and brownish. The last whorl is well rounded and without keel near aperture and has a similar diameter to the penultimate whorl. The shell colour is light brownish and translucent (becoming whitish when worn). The aperture is semi-ovate, with expanded and whitish lip and thin or thickened with whitish parietal callus. The columella is straight and dilated, with a rimate umbilicus. Based on the original description, A. chaudoensis can be distinguished from A. siamensis obesula in having an elongate cylindrical shell and higher number of whorls, while the latter species has an ovate conic shell and a smaller number of whorls.