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 shepardi Wewalka, 1997 Fig. 35 Microdytes shepardi Wewalka, 1997: 37; Wewalka 2011 : 33; Nilsson and Hajek 2023 : 212. Type locality. Thailand, Phetchabun Province, Nam Nao NP. Material examined. Thailand : Chiang Mai Province . 1♂ , 1♀ , Chiang Dao District , Ping Khong St. 226 (alt. 430 m ), 20.III.2021 , R. Okada leg. (CRO) ; Chiang Rai Province . 1♂ , Wiang Kaen District , Muang Yai St. 71 (alt. 440 m ), 2.VIII.2019 , R. Okada leg. (CRO) ; Uthai Thani Province . 5♂♂ , 2♀♀ , Ban Rai District , Kaen Makrut St. 128 (alt. 440 m ), 20.VI.2020 , R. Okada leg. (CGW, CRO, THNHM) (Fig. 35 ) . Laos : 1♂ , Luang Prabang Province , Thong Khan , 19°35'N , 101°58'E , alt. ca. 750 m , 11.-12.V.2002 , V. Kuban leg. (NMB) . Distribution. Thailand: Chiang Mai, Chiang Rai (first record), Mae Hong Son, Phetchabun, Uthai Thani (first record), Chaiyaphum and Sakon Nakhon provinces; Laos: Luang Prabang Province; China: Yunnan Province.