semicinctus, Julis Ayres [W. O.] 1859:32 [Proceedings of the California Academy of Sciences (Series 1) v. 2 (1858-1862); ref. 155] Cedros Island, Baja California, Mexico. Holotype (unique): CAS (lost in 1906). •Valid as Iridio semicinctus (Ayres 1859) -- (Kuiter 2010:222 [ref. 35285]). •Valid as Halichoeres semicinctus (Ayres 1859) -- (Eschmeyer & Herald 1983:236 [ref. 9277], Allen & Robertson 1994:203 [ref. 22193], Gomon in Fischer et al. 1995:1217 [ref. 22830], De La Cruz Agüero et al. 1997:199 [ref. 24545], Fuller et al. 1999:456 [ref. 25838], Parenti & Randall 2000:24 [ref. 24943], Lea & Rosenblatt 2000:125 [ref. 25206], Thomson et al. 2000:174 [ref. 25640], Allen & Groce 2001:131 [ref. 25750], Richards & Engle 2001:182 [ref. 25759], Bernardi et al. 2004:372 [ref. 27454], Nelson et al. 2004:155 [ref. 27807], Barber & Bellwood 2005:250 [ref. 35318], Love et al. 2005:136 [ref. 37547], Page et al. 2013:160 [ref. 32708], Fourriére et al. 2016:461 [ref. 34668] doubtful from Revillagigedo Archipelago (Mexico), Kells et al. 2016:264 [ref. 35888], Wainwright et al. 2017:37 [ref. 35725], Love et al. 2021:177 [ref. 39279]). Current status: Valid as Halichoeres semicinctus (Ayres 1859). Labridae. Distribution: Eastern Pacific: central California (U.S.A.) south to Pacific coast of southern Baja California Sur (Mexico), including Gulf of California (Mexico). Habitat: marine.