extensus, Fundulus Jordan [D. S.] & Gilbert [C. H.] 1882:355 [Proceedings of the United States National Museum v. 5 (no. 290); ref. 12308] Cape San Lucas, Baja California, Mexico [apparently incorrect]. Syntypes: USNM 30972 (2). •Synonym of Fundulus diaphanus (Lesueur 1817) -- (Wildekamp 1996:243 [ref. 23649]). •Synonym of Fundulus parvipinnis Girard 1854 -- (Castro-Aguirre et al. 1999:221 [ref. 24550]). •Synonym of Fundulus diaphanus (Lesueur 1817), subspecies diaphanus (Lesueur 1817) -- (Lazara 2001:145 [ref. 25711]). Current status: Synonym of Fundulus diaphanus (Lesueur 1817). Fundulidae. Habitat: freshwater, brackish.