eques, Chaetodon Steindachner [F.] 1903:18 [Anzeiger der Akademie der Wissenschaften in Wien, Mathematisch-Naturwissenschaftliche Klasse v. 40 (no. 3) (for 22 Jan. 1903); ref. 19244] Yucatán, Mexico. Holotype (unique): NMW. Illustrated and described in more detail in Steindachner 1903:18, Pl. 1 (fig. 1) [ref. 4240]. •Synonym of Chaetodon aya Jordan 1886 -- (Burgess 1978:327 [ref. 700], Allen 1980:161 [ref. 22764]). •Synonym of Prognathodes aya (Jordan 1886). Current status: Synonym of Prognathodes aya (Jordan 1886). Chaetodontidae: Chaetodontinae. Habitat: marine.