Urotrygon Gill [T. N.] 1863:173 Fem. Urotrygon mundus Gill 1863. Type by monotypy. •Valid as Urotrygon Gill 1863 -- (Nakaya in Masuda et al. 1984:15 [ref. 6441], Compagno 1986:141 [ref. 5648], Miyake & McEachran 1986:291 [ref. 6153], Miyake & McEachran 1988 [ref. 12878], Nishida 1990:98 [ref. 19783], Castro-Aguirre et al. 1999:67 [ref. 24550], Last & Compagno 1999:1470 [ref. 24639], Compagno 1999:494 [ref. 25589], McEachran & Carvalho 2003:573 [ref. 26985], Schwartz 2008:34 [ref. 36773], Yearsley et al. 2008:261 [ref. 29691], Del Moral-Flores et al. 2015:501 [ref. 33729], Del Moral-Flores et al. 2016:124 [ref. 34398], Last & McEachran 2016:657 [ref. 35013], Ehemann et al. 2018:27 [ref. 36194]). Current status: Valid as Urotrygon Gill 1863. Urotrygonidae.