microphthalmum, Urotrygon Delsman [H. C.] 1941:65, Fig. 8 [Mémoires du Musée royal d'histoire naturelle de Belgique (Ser. 2) No. 21; ref. 13171] Mouth of Amazon River, Brazil, 1°06'N, 47°53'W, depth 25-30 fathoms. Syntypes: IRSNB 53 (2). Type catalog: Walschaerts 1987:6 [ref. 20755]. •Valid as Urotrygon microphthalmum Delsman 1941 -- (Uyeno & Miyake in Uyeno et al. 1983:81 [ref. 14275], Miyake & McEachran 1986:299 [ref. 6153], Miyake & McEachran 1988:374 [ref. 12878], Nishida 1990:92 [ref. 19783], Aguilera 1998:45 [ref. 24221], Cervigón & Alcalá 1999:196 [ref. 24490], Compagno 1999:494 [ref. 25589], Menni & Stehmann 2000:89 [ref. 24909], Almeida et al. 2000:67 [ref. 25679], Camargo & Isaac 2001:144 [ref. 27639], Gomes & Gadig in Menezes et al. 2003:30 [ref. 27192], McEachran & Carvalho 2003:573 [ref. 26985], Weigmann 2016:162 [ref. 34211], Last & McEachran 2016:667 [ref. 35013], Ehemann et al. 2019:[7] [ref. 36861]). Current status: Valid as Urotrygon microphthalmum Delsman 1941. Urotrygonidae. Distribution: Western Atlantic: Venezuela to Permambuco (Brazil), including southern Caribbean Sea. Habitat: marine.