atratus, Dasyatis Ishiyama [R.] & Okada [K.] 1955:211, Figs. 1-2 [Journal of the Shimonoseki College of Fisheries v. 4 (no. 2); ref. 12277] North of Mariana Islands. Holotype: SUF. Paratypes: FAKU 24671 (1, not seen in 1997). •Synonym of Dasyatis violacea (Bonaparte 1832) -- (Krefft & Stehmann 1973:71 [ref. 7167], Nishida & Nakaya 1990:332 [ref. 20166]). •Valid as Dasyatis atratus Ishiyama & Okada 1955 -- (Chen et al. 1997:8 [ref. 26476]). •Synonym of Pteroplatytrygon violacea (Bonaparte 1832) -- (Weigmann 2016:140 [ref. 34211], Jones et al. 2020:299 [ref. 37610]). Current status: Synonym of Pteroplatytrygon violacea (Bonaparte 1832). Dasyatidae: Dasyatinae. Habitat: marine.