dienbienensis, Opsariichthys Nguyen [V. H.] & Nguyen [H. D.] 2000:14, Figs. 3-4 [Tap Chí Sinh Hoc (Journal of Biology) v. 22 (no. 4); ref. 26614] Nam Rom River, Dien Bien Phu, Lai Chau Province, Vietnam. Holotype: ARI I: H.01.15.03.01. Paratypes: H.01.15.03.02 (1), H.01.99.03.01 (1); HNNU P.02.01.03.99 (1), P.02.02.03.99 (1), P.02.0.03.99 [?P.02.03.03.99] (1). •Questionably a synonym of Opsariichthys bidens Günther 1873 -- (Kottelat 2013:130 [ref. 32989]). •Valid as Opsariichthys dienbienensis Nguyen & Nguyen 2000 -- (Chen et al. 2009:175 [ref. 30298], Huynh & Chen 2014:142 [ref. 33158], Peng et al. 2024:29 [ref. 41610]). Current status: Valid as Opsariichthys dienbienensis Nguyen & Nguyen 2000. Xenocyprididae. Distribution: Southeast Asia: northern Vietnam. Habitat: freshwater.