amurensis, Opsariichthys uncirostris Berg [L. S.] 1932:384, Fig. 295 [Les poissons des eaux douces de l'U.R.S.S. Part 1; ref. 278] Amur, Siberia, Russia. No types known. •Synonym of Opsariichthys bidens Günther 1873 -- (Chen & Chu in Chen et al. 1998:47 [ref. 23878]). •Synonym of Opsariichthys uncirostris (Temminck & Schlegel 1846), but a valid subspecies as described -- (Berg 1949:613 [ref. 20661], Yang & Hwang 1964:42 [ref. 13497], Bogutskaya & Naseka 1996:30 [ref. 22798], Kim 1997:272 [ref. 24032], Bogutskaya 1998:79 [ref. 23589], Gorlacheva et al. 1999:261 [ref. 24866], Kim & Park 2002:182 [ref. 25913], Choi et al. 2003:157, 514 [ref. 26218], Bogutskaya et al. 2008:333 [ref. 30085], Parin et al. 2014:84 [ref. 33547], Wang et al. 2019:[6] [ref. 36521]). •Valid as Opsariichthys amurensis Berg 1932 -- (Dyldin et al. 2023:[16] [ref. 40328]). Current status: Valid as Opsariichthys amurensis Berg 1932. Xenocyprididae. Distribution: East Asia: Amur River basin (Russia) endemic. Habitat: freshwater.