opercularis, Trichidion Gill [T. N.] 1863:168 [Proceedings of the Academy of Natural Sciences of Philadelphia v. 15; ref. 1681] Western coast of Central America [probably Cape San Lucas, Baja California, Mexico]. Holotype (unique): USNM 4954 or 4955 (both lost). Type catalog: Smith 2018:81 [ref. 36061]. See Motomura et al. 2002:363 [ref. 26500] for comment about type locality. •Valid as Polydactylus opercularis (Gill 1863) -- (Hiyama in Kumada 1937:29 [ref. 39147], Eschmeyer & Herald 1983:236 [ref. 9277], Pequeño 1989:63 [ref. 14125], Allen & Robertson 1994:195 [ref. 22193], Bussing & López S. 1994:138 [ref. 23101] as operularis [sic], Schneider in Fischer et al. 1995:1387 [ref. 22830], Chirichigno F. & Vélez D. 1998:192 [ref. 24555], Lea & Rosenblatt 2000:125 [ref. 25206], Motomura et al. 2001:301 [ref. 25548], Motomura et al. 2002:363 [ref. 26500], Motomura 2004:7 [ref. 27601], Nelson et al. 2004:146 [ref. 27807], Motomura 2004:65 [ref. 27970], Love et al. 2005:126 [ref. 37547], Page et al. 2013:151 [ref. 32708], Kells et al. 2016:248 [ref. 35888], Kang et al. 2017:[2] [ref. 35524], Romero-Berny et al. 2018:91 [ref. 35859], González-Murcia et al. 2019:305 [ref. 36544], Love et al. 2021:164 [ref. 39279], Angulo et al. 2023:42 [ref. 40676], Siccha-Ramirez et al. 2023:366 [ref. 40816]). Current status: Valid as Polydactylus opercularis (Gill 1863). Polynemidae. Distribution: Eastern Pacific: southern California (U.S.A.) south to Chile, including Gulf of California (Mexico). Habitat: brackish, marine.