siamensis, Chela Günther [A.] 1868:336 [Catalogue of the fishes in the British Museum v. 7; ref. 1990] Pachebon [Petchabun], Thailand. Holotype (unique): BMNH 1861.10.8.17. •Synonym of Oxygaster oxygastroides (Bleeker 1852) -- (Bănărescu 1969:192 [ref. 7797], Bănărescu 1971:17 [ref. 20612]). •In Parachela -- (Kottelat 1995:55 [ref. 21728]). •Valid as Parachela siamensis (Günther 1868) -- (Rainboth 1996:69 [ref. 22772], Doi 1997:10 [ref. 22832], Kottelat 1998:45 [ref. 23436], Kottelat 2001:68 [ref. 25780], Kottelat 2013:138 [ref. 32989], Kottelat 2015:43 [ref. 33971], Taki et al. 2021:76 [ref. 39830]). Current status: Valid as Parachela siamensis (Günther 1868). Xenocyprididae. Distribution: Southeast Asia: Mekong and Chao Phraya basins and Xe Bangfai, Thailand, Laos, Cambodia and Vietnam. Habitat: freshwater.