gymnauchen, Sicydium Bleeker [P.] 1858:11 [Acta Societatis Regiae Scientiarum Indo-Neêrlandicae v. 3 (art. 11); ref. 361] Manado, Sulawesi, Indonesia. Syntypes: (over 300) RMNH 6191 (many of 1946 specimens), ?RMNH 6169 (?). •Valid as Sicyopterus gymnauchen (Bleeker 1858) -- (Talwar & Jhingran 1991:969 [ref. 20764], Parenti & Maciolek 1993:963 [ref. 21279]). •Synonym of Sicyopterus lagocephalus (Pallas 1770) -- (Watson et al. 2000:13 [ref. 25138]). •Synonym of Sicyopterus macrostetholepis (Bleeker 1853) -- (Kottelat 2013:428 [ref. 32989]). Current status: Synonym of Sicyopterus macrostetholepis (Bleeker 1853). Gobiidae: Sicydiinae. Habitat: freshwater, brackish, marine.