Species that contain: Eucinostomus and californiensis [ 3 ] records

californiensis, Diapterus Gill [T. N.] 1862:245 [Proceedings of the Academy of Natural Sciences of Philadelphia v. 14; ref. 1665] Cape San Lucas, Baja California, Mexico. Treated as a nomen oblitum by De La Cruz-Agüero 2015:182 [ref. 35419]. •Valid as Eucinostomus californiensis (Gill 1862) -- (Hiyama in Kumada 1937:47 [ref. 39147]). •Often regarded as a synonym of Eucinostomus gracilis (Gill 1862) described in the same work; but Jordan in Jordan & Evermann 1898:1370, footnote 3 [ref. 2444] clearly states that Eucinostomus californiensis has priority over E. gracilis -- thereby serving as first reviser. •Apparently most current authors favor maintaining current usage, and gracilis is treated as valid. •Synonym of Eucinostomus gracilis (Gill 1862) -- (Castro-Aguirre et al. 1999:315 [ref. 24550], De La Cruz-Agüero 2015:182 [ref. 35419]). Current status: Synonym of Eucinostomus gracilis (Gill 1862). Gerreidae. Habitat: freshwater, brackish, marine.

elongatus, Eucinostomus californiensis Meek [S. E.] & Hildebrand [S. F.] 1925:586, Pl. 62 (fig. 2) [Field Museum of Natural History, Publications, Zoölogical Series v. 15 (publ. 226); ref. 13609] Taboga Island, (Pacific) Panama. Holotype: USNM 81732. Paratypes: FMNH 28009-60 (52); USNM 81293 (48, now 44), 201670 [ex 81293] (4) Type catalog: Ibarra & Stewart 1987:35 [ref. 12367]. •Synonym of Eucinostomus gracilis (Gill 1862) -- (Castro-Aguirre et al. 1999:315 [ref. 24550]). Current status: Synonym of Eucinostomus gracilis (Gill 1862). Gerreidae. Habitat: freshwater, brackish, marine.

gracilis, Diapterus Gill [T. N.] 1862:246 [Proceedings of the Academy of Natural Sciences of Philadelphia v. 14; ref. 1665] Cape San Lucas, Baja California, Mexico. No types known. Treated as a nomen protectum by De La Cruz-Agüero 2015:182 [ref. 35419]. •Name is a synonym of Eucinostomus californiensis (Gill 1862) but current usage is accepted, and gracilis is treated as valid under the 2000 Code. •Valid as Eucinostomus gracilis (Gill 1862) -- (Eschmeyer & Herald 1983:216 [ref. 9277], Allen & Robertson 1994:143 [ref. 22193], Bussing & López S. 1994:114 [ref. 23101], Bussing in Fischer et al. 1995:1123 [ref. 22829], De La Cruz Agüero et al. 1997:147 [ref. 24545], Grove & Lavenberg 1997:399 [ref. 24023], Castro-Aguirre et al. 1999:314 [ref. 24550], Chirichigno F. & Vélez D. 1998:347 [ref. 24555], Fuller et al. 1999:400 [ref. 25838], Nelson et al. 2004:143 [ref. 27807], Love et al. 2005:122 [ref. 37547], McCosker & Rosenblatt 2010:192 [ref. 30957], McMahan et al. 2013:450 [ref. 32422], Page et al. 2013:148 [ref. 32708], Barriga Salazar 2014:119 [ref. 35745], De La Cruz-Agüero 2015:182 [ref. 35419], Jiménez-Prado et al. 2015:393 [ref. 34894], Galván-Villa et al. 2016:146 [ref. 34871], Romero-Berny et al. 2018:91 [ref. 35859], Angulo 2021:7 [ref. 38913], Love et al. 2021:161 [ref. 39279], Angulo et al. 2023:72 [ref. 40676]). Current status: Valid as Eucinostomus gracilis (Gill 1862). Gerreidae. Distribution: Eastern Pacific: southern California (U.S.A.) south to Ecuador, including Gulf of California (Mexico) and Galapagos Islands (Ecuador). IUCN (2010): Least Concern. Habitat: freshwater, brackish, marine.