tsuchigae, Gnathopogon Jordan [D. S.] & Hubbs [C. L.] 1925:170 [Memoirs of the Carnegie Museum v. 10 (no. 2); ref. 2486] Ping-yang River, northern Korea. Holotype (unique): FMNH 58712 [ex CM 7818]. Type catalog: Henn 1928:72 [ref. 12305], Ibarra & Stewart 1987:41 [ref. 12367]. •Synonym of Squalidus gracilis (Temminck & Schlegel 1846), but a valid subspecies -- (Hosoya & Jeon 1984:41 [ref. 17431], Kim 1997:214 [ref. 24032], Kim & Lee 2001:46 [ref. 25334], Kim & Park 2002:120 [ref. 25913]). •Synonym of Squalidus chankaensis Dybowski 1872, but a valid subspecies -- (Choi et al. 2003:158, 506 [ref. 26218]). Current status: Synonym of Squalidus gracilis (Temminck & Schlegel 1846). Gobionidae. Habitat: freshwater.