xyosternus, Brachyopsis Jordan [D. S.] & Gilbert [C. H.] 1880:152 [Proceedings of the United States National Museum v. 3 (no. 135); ref. 10583] Santa Cruz beach, Monterey Bay, California, U.S.A. Holotype: USNM (not found). Type catalog: Blanc & Hureau 1968:56 [ref. 20738] with A.3278 as holotype, Zarske 2003:31 [ref. 27474], but see Sheiko & Mecklenburg 2004:18 [ref. 27591]. The species xyosterna dates to 2 July 1880 and predates annae Steindachner published after 15 July 1880. See Sheiko & Mecklenburg 2004:18 [ref. 27591] for type information. •Valid as Stellerina xyosterna (Jordan & Gilbert 1880) -- (Eschmeyer & Herald 1983:189 [ref. 9277], Peden & Jamieson 1988:493 [ref. 12864], McAllister 1990:206 [ref. 14674], Kanayama 1991:95 [ref. 19261], Sheiko 1993:84 [ref. 21227], Busby 1998:68 [ref. 25508], Mecklenburg et al. 2002:534 [ref. 25968], Sheiko & Mecklenburg 2004:18 [ref. 27591], Love et al. 2005:98 [ref. 37547], Sheiko & Fedorov 2010:98 [ref. 38118], Page et al. 2013:126 [ref. 32708], Pietsch & Orr 2015:50 [ref. 34694], Kells et al. 2016:206 [ref. 35888], Burton & Lea 2019:70 [ref. 37205], Love et al. 2021:132 [ref. 39279]). Current status: Valid as Stellerina xyosterna (Jordan & Gilbert 1880). Agonidae: Brachyopsinae. Distribution: Northeastern Pacific: Gulf of Alaska (U.S.A.) south to Pacific coast of Baja California Sur (Mexico). Habitat: marine.