thacmoensis, Hemibarbus Nguyen [V. H.] in Nguyen & Ngô 2002:197, Fig. 90 [Freshwater fishes of Viet Nam. Volume I. Family Cyprinidae v. 1; ref. 28301] Thac Mo, Na Hang, Tuyên Quang, Viêt Nam. Holotype: VNCNTTS I: H.01.48.06.01. Paratypes: VNCNTTS I: H.01.48.06.02 (1). •Valid as Hemibarbus thacmoensis Nguyen 2002 (Kottelat 2013:111 [ref. 32989]). •Synonym of Hemibarbus umbrifer (Lin 1931) -- (Endruweit 2025:86 [ref. 42401]). Current status: Synonym of Hemibarbus umbrifer (Lin 1931). Gobionidae. Distribution: Southeast Asia: Gâm River system, Na Hang, Tuyên Quang (Vietnam) [if valid]. Habitat: freshwater.