150 © Centre for Biodiversity Conservation, Phnom Penh Cambodian Journal of Natural History 2012 (2) 150-163 O.E. Kosterin et al. New records of Odonata from Cambodia, based mostly on photographs Oleg E. KOSTERIN 1,2, *, Gerard CHARTIER 3 , Jeremy HOLDEN 4 and François Sockhom MEY 5 1 Institute of Cytology & Genetics SB RAS, Acad. Lavrentyev ave. 10, Novosibirsk, 630090, Russia. 2 Novosibirsk State University, Pirogova str. 2, Novosibirsk, 630090, Russia. 3 Rainbow Lodge, Tatai, Koh Kong, Cambodia. 4 67 High Street, Meppershall, Bedfordshire, United Kingdom. 5 3 rue Frédéric Chopin, Haubourdin, France. *Corresponding author. Email kosterin@bionet.nsc.ru Paper submitted 9 October 2012, revised manuscript accepted 22 December 2012. Abstract Nine species of Odonata – Euphaea ochracea, Lestes nodalis, Gynacantha phaeomeria, Gynacantha demeter, Microgomphus chelifer, Amphithemis curvistyla, Orthetrum triangulare, Rhyothemis plutonia and Tetrathemis platyptera – are reported for the first time for Cambodia, raising the number of named Odonata species recorded in this country to 135. All of the new records are based on photographs taken in nature apart from E. ochracea, which is supported by a voucher specimen. Also based on photographs, new distributional records for 93 Odonata species are provided for a number of localities in the Cardamom Mountains: the environs of Tatai Village in Koh Kong Province, and the environs of Ou Saom and Pramoui villages, including parts of Phnom Samkos Wildlife Sanctuary, in Pursat Province. Ectoparasitic midges in the genus Forcipomyia (Pterobosca) were recorded on one species in the family Coenagrionidae and 11 species in the family Libellulidae. Keywords dragonflies, damselflies, ectoparasites, insects, Forcipomyia, new records, Pterobosca. Odonata – Euphaea ochracea, Lestes nodalis, Gynacantha phaeomeria, Gynacantha demeter, Microgomphus chelifer, Amphithemis curvistyla, Orthetrum triangulare, Rhyothemis plutonia Tetrathemis platyptera (Dragonfly Damselfly) E. ochracea (new distributional records) (Ectoparasitc midges) Forcipomyia (Pterobosca) Coenagrionidae Libellulidae CITATION: Kosterin, O.E., Chartier, G., Holden, J. & Mey, F.S. (2012) New records of Odonata from Cambodia, based mostly on photo- graphs. Cambodian Journal of Natural History, 2012, 150–163.