longicaudus, Gobius Jenkins [O. P.] & Evermann [B. W.] 1889:146 [Proceedings of the United States National Museum v. 11 (no. 698); ref. 2342] Guaymas, Sonora, western Mexico. Syntypes: (about 40) USNM 39636 (3). •Valid as Gobionellus longicaudus (Jenkins & Evermann 1889) -- (Eschmeyer & Herald 1983:262 [ref. 9277]). •Synonym of Ctenogobius sagittula (Günther 1862) -- (Castro-Aguirre et al. 1999:441 [ref. 24550], Pezold 2022:111 [ref. 39351]). Current status: Synonym of Ctenogobius sagittula (Günther 1862). Gobiidae: Gobionellinae. Habitat: freshwater, brackish, marine.