loos, Sinilabeo tonkinensis Nguyen [V. H.] in Nguyen & Ngô 2002:493, Fig. 250 [Freshwater fishes of Viet Nam. Volume I. Family Cyprinidae v. 1; ref. 28301] Na Hang, Tuyên Quang, Viêt Nam. Holotype: VNCNTTS I: H.01.92.09.01. Paratypes: VNCNTTS I: H.01.92.09.01 - 04 (3). •Synonym of Sinilabeo tonkinensis (Pellegrin & Chevey 1934), but a valid subspecies loos Nguyen 2002. •Synonym of Bangana tonkinensis (Pellegrin & Chevey 2002) -- (Kottelat 2013:76 [ref. 32989] with question). •Valid as Vinalabeo loos (Nguyen 2002) -- (Nguyen et al. 2016:143 [ref. 35165]). •Possibly valid as Altigena loos (Nguyen 2002). •Synonym of Altigena tonkinensis (Pellegrin & Chevey 1934) -- (Endruweit 2025:98 [ref. 42401]). Current status: Synonym of Altigena tonkinensis (Pellegrin & Chevey 1934). Cyprinidae: Labeoninae. Habitat: freshwater.