Annotated checklist of freshwater molluscs from the largest freshwater lake in Southeast Asia Author Ng, Ting Hui Lee Kong Chian Natural History Museum, Faculty of Science, National University of Singapore, 2 Conservatory Drive, 117377, Singapore https://orcid.org/0000-0002-5123-0039 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 Sutcharit, Chirasak Animal Systematics Research Unit, Department of Biology, Faculty of Science, Chulalongkorn University, 254 Phayathai Road, Pathumwan, Bangkok 10330, Thailand Author Chhuoy, Samol 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 Pin, Kakada Wonders of the Mekong Project, c / o IFReDI, No. 86, Norodom Blvd., PO Box 582, Phnom Penh, Cambodia Author Pholyotha, Arthit Animal Systematics Research Unit, Department of Biology, Faculty of Science, Chulalongkorn University, 254 Phayathai Road, Pathumwan, Bangkok 10330, Thailand https://orcid.org/0000-0001-6677-1164 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 Hogan, Zeb S. Wonders of the Mekong Project, c / o IFReDI, No. 86, Norodom Blvd., PO Box 582, Phnom Penh, Cambodia & Department of Biology, University of Nevada, 1664 N. Virginia Street, Reno, NV 89557, USA 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 https://orcid.org/0000-0002-3659-6577 pengbun.ngor@gmail.com text ZooKeys 2020 958 107 141 http://dx.doi.org/10.3897/zookeys.958.53865 journal article http://dx.doi.org/10.3897/zookeys.958.53865 1313-2970-958-107 AB196008154249D4B23E1892D2191C18 377C3EF18E8951FD9599616E45E03C94 Corbicula spp. Fig. 2D-G Material examined. CIFI.MOL.029, CIFI.MOL.030, CIFI.MOL.031, CIFI.MOL.032, MUMNH.COR.0194, MUMNH.COR.0195, MUMNH.COR.0196, MUMNH.COR.0197, MUMNH.COR.0198, MUMNH.COR.0199, MUMNH.COR.0200, MUMNH.COR.0201, MUMNH.COR.0202, MUMNH.COR.0203, MUMNH.COR.0204, MUMNH.COR.0205, MUMNH.COR.0206, MUMNH.COR.0207, MUMNH.COR.0208, MUMNH.COR.0209, MUMNH.COR.0210, MUMNH.COR.0211, MUMNH.COR.0212, ZRC.MOL.015634, ZRC.MOL.015635, ZRC.MOL.015636, ZRC.MOL.015637, ZRC.MOL.015638. Distribution and habitat. Tonle Sap River and Lake, and most tributaries (locality no. 3, 6, 7, 8, 11, 12, 16, 18, 19, 20, 21, 22, 23, 24, 27, 32, 38, 39 and 40). Buried just below surface of soft, muddy substrate of the water bodies. Remarks. Approximately 17 different species of Corbicula have previously been recorded from Cambodia (Suppl. material 1: Table S1), but there has been no known attempt to verify if all are valid records. In neighbouring Thailand, 21 nominal Corbicula species were all found to belong to only Corbicula fluminea (OF Mueller , 1774), a single species ( Kijviriya et al. 1991 ). Based on morphological examination of the fresh material from the Tonle Sap basin, it is possible that there may be more than one Corbicula species present. However, further investigation including molecular analysis will be required to confirm the species identities ( Bieler and Mikkelsen 2019 ). Corbicula species are the only bivalves that are commercially harvested from the Lake to be sold locally and exported abroad for human consumption and as animal feed (Fig. 4A, C ). More than 6000 tonnes of Corbicula clams were recorded from five commercial landing sites in Kampong Chhnang Province, within the Tonle Sap basin, over the period of one year ( Ngor et al. 2018d ).