spinosus, Rhinobatus Günther [A.] 1870:518 [Catalogue of the fishes in the British Museum v. 8; ref. 1995] Mexico. Holotype (unique): BMNH 1870.6.20.2 (skin). Type locality needs research. •Valid as Rhinobatos spinosus Günther 1870 -- (Castro-Aguirre et al. 1999:58 [ref. 24550], Compagno 1999:486 [ref. 25589] with question, Nelson et al. 2004:55 [ref. 27807], Page et al. 2013:55 [ref. 32708], Del Moral-Flores et al. 2016:108 [ref. 34398]). •Valid as Pseudobatos spinosus (Günther 1870) -- (Ehemann et al. 2018:26 [ref. 36194] with question). •Valid as Glaucostegus spinosus (Günther 1870) -- (Weigmann 2016:85 [ref. 34211] see remarks, González-Acosta et al. 2021:7 [ref. 38361], Fricke et al. 2024:88 [ref. 41622]). Current status: Valid as Glaucostegus spinosus (Günther 1870). Glaucostegidae. Distribution: Eastern Pacific: Mexico. Habitat: marine.