tama, Biwia Oshima [M.] 1957:16, Fig. 2 [Japanese Journal of Ichthyology v. 6 (nos 1-2); ref. 12162] Tama River, Denyenchofu, Japan. Holotype (unique): not researched. •Valid as Biwia tama Oshima 1957 -- (Okada 1961:455 [ref. 6363]). •Not treated in genus Biwia by Kawase & Hosoya 2010 [ref. 30778]. Current status: Valid as Biwia tama Oshima 1957. Gobionidae. Distribution: Japan. Habitat: freshwater.