buas, Microphysogobio Mai [D. Y.] 1978:198, Fig. 90 [Identification of the fresh-water fishes of North Viet Nam v. 1; ref. 13511] Búa River, northern Vietnam. Syntypes: DVZUT. •Tentative synonym of Microphysogobio yunnanensis (Yao & Yang 1977) -- (Kottelat 2001:30, 35 [ref. 25482] as uas on p. 35). •Synonym of Microphosogobio yunnanensis (Yao & Yang 1977) -- (Kottelat 2013:124 [ref. 32989]). •Synonym of Microphosogobio kachekensis (Oshima 1926) -- (Endruweit 2025:87 [ref. 42401]). Current status: Synonym of Microphysogobio kachekensis (Oshima 1926). Gobionidae. Habitat: freshwater.