aspidurus, Urolophus Jordan [D. S.] & Gilbert [C. H.] 1882:307 [Bulletin of the U. S. Fish Commission v. 1 (for 1881); ref. 2471] Bay of Panama, eastern Pacific. Syntypes: USNM 29307 (1), 29410 (1), 29454 (1). •Valid as Urotrygon aspidurus (Jordan & Gilbert 1882) -- (Castro-Aguirre 1965:226 [ref. 41098], Miyake & McEachran 1986:300 [ref. 6153]). •Valid as Urotrygon aspidura (Jordan & Gilbert 1882) -- (Miyake & McEachran 1988:374 [ref. 12878], Allen & Robertson 1994:35 [ref. 22193], Bussing & López S. 1994:34 [ref. 23101], McEachran in Fischer et al. 1995:790 [ref. 22829], Castro-Aguirre & Espinosa Pérez 1996:51 [ref. 22793], Chirichigno F. & Vélez D. 1998:66 [ref. 24555], Castro-Aguirre et al. 1999:70 [ref. 24550], Compagno 1999:494 [ref. 25589], Nelson et al. 2004:56 [ref. 27807], Love et al. 2005:14 [ref. 37547], Page et al. 2013:56 [ref. 32708], Del Moral-Flores et al. 2016:124 [ref. 34398] as aff. aspidura, Weigmann 2016:162 [ref. 34211], Last & McEachran 2016:664 [ref. 35013], Ehemann et al. 2018:27 [ref. 36194], Calle-Morán et al. 2020:247 [ref. 37881], González-Acosta et al. 2021:8 [ref. 38361], Love et al. 2021:28 [ref. 39279], Page et al. 2023:47 [ref. 40505], Siccha-Ramirez et al. 2023:77 [ref. 40816], Fricke et al. 2024:99 [ref. 41622]). Current status: Valid as Urotrygon aspidura (Jordan & Gilbert 1882). Urotrygonidae. Distribution: Eastern Pacific: Pacific coast of Baja California Sur (Mexico) south to northern Peru, including Gulf of California (Mexico). Habitat: marine.