declivifrons, Euschistodus Gill [T. N.] 1862:146 [Proceedings of the Academy of Natural Sciences of Philadelphia v. 14 (nos 3-4); ref. 1662] Cape San Lucas, Baja California, Mexico. Syntypes: (orig. 7) BMNH 1862.5.21.21 (1) [ex USNM], USNM 9332 (now 10). •Synonym of Abudefduf concolor (Gill 1862) -- (Allen 1991:234 [ref. 19344]). •Valid as Abudefduf declivifrons (Gill 1862) -- (Allen & Robertson 1994:186 [ref. 22193], Lessios et al. 1995:282 [ref. 22407], De La Cruz Agüero et al. 1997:261 [ref. 24545], Grove & Lavenberg 1997:473 [ref. 24023], Allen & Adrim 2000:51 [ref. 25052], Thomson et al. 2000:164 [ref. 25640], Nelson et al. 2004:154 [ref. 27807], Love et al. 2005:134 [ref. 37547], Page et al. 2013:158 [ref. 32708], Galván-Villa et al. 2016:147 [ref. 34871], Fourriére et al. 2016:447 [ref. 34668], Del Moral-Flores et al. 2016:610 [ref. 34923], Love et al. 2021:174 [ref. 39279], Parenti 2021:40 [ref. 38418], Vela-Espinosa et al. 2023:8 [ref. 40981]). Current status: Valid as Abudefduf declivifrons (Gill 1862). Pomacentridae: Glyphisodontinae. Distribution: Eastern Pacific: Pacific coast of southern Baja California Sur (Mexico) south to Costa Rica, including Gulf of California (Mexico) Habitat: marine.