A review of Microdytes J. Balfour-Browne, 1946 from Thailand, Laos, and Cambodia with descriptions of five new species and new records (Coleoptera, Dytiscidae) Author Okada, Ryohei https://orcid.org/0000-0002-8488-0660 Thailand Natural History Museum, National Science Museum, Technopolis, Pathum Thani, Thailand & Coleopterological Society of Japan, National Museum of Nature and Science, Tsukuba, Japan wasserinsekt@kub.biglobe.ne.jp Author Jaitrong, Weeyawat https://orcid.org/0000-0003-1362-0754 Thailand Natural History Museum, National Science Museum, Technopolis, Pathum Thani, Thailand Author Wewalka, Guenther https://orcid.org/0000-0002-2994-8001 Starkfriedgasse 16 / 1 / 3, A - 1190 Vienna, Austria text ZooKeys 2023 2023-04-25 1159 87 119 http://dx.doi.org/10.3897/zookeys.1159.99218 journal article http://dx.doi.org/10.3897/zookeys.1159.99218 1313-2970-1159-87 CD97DD120549412F976508D8DE21605B ECCECB868071523DB7628E304850BD62 Microdytes heineri Wewalka, 2011 Figs 24 , 39A Microdytes heineri Wewalka, 2011: 23; Nilsson and Hajek 2023 : 211. Type locality. China, Yunnan Province, Simao Prefecture. Material examined. Thailand : Chiang Mai Province . 8 exs. , Mae Taeng District , Pa Pae St. 49 (alt. 1000 m ), 15.VI.2019 , R. Okada leg. (CGW, CRO, THNHM) ; 1♂ , same district, Kuet Chang St. 170 (alt. 520 m ), 16.VIII.2020 , R. Okada leg. (CRO) (Fig. 24 ) . Comments. Male specimens have distinct setae on the metacoxae (Fig. 39A ). Distribution. Thailand: Nan and Chiang Mai (first record) provinces; Laos: Luang Namtha and Luang Prabang provinces; China: Yunnan Province.