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A new Southwestern Atlantic species of Parmaturus, P. angelae, new species, is described from two specimens captured off Brazil. It is distinguished from congeners by the following characters: origin of the first dorsal fin anterior to pelvic-fin origin, presence of well-developed upper and lower caudal crests of denticles, dorsal fins subequal, lateral denticles teardrop-shaped and lacking lateral cusplets, denticles evenly spaced, proportional dimensions, and vertebral counts. Parmaturus angelae, new species, is the second species of the genus reported from the Atlantic Ocean and only the third species outside of the Indo-West Pacific region. Parmaturus remains rather poorly defined as only two species have been studied anatomically in any detail.

A new species of Dasyatis is described from the southwestern Atlantic, off northeastern Brazil. It differs from its congeners by its relatively large eyes, presence of well-developed dorsal and ventral finfolds on tail ending approximately on the same vertical line, dorsal and ventral color patterns, and possession of distinct ventral markings on disc. Adults are apparently associated with coral or sandstone reefs. Uma nova especie de Dasyatis e descrita do Atlântico ocidental, da costa nordeste do Brasil. Ela difere de suas congeneres pelos olhos relativamente grandes, pela presenca de membranas dorsais e ventrais bem desenvolvidas na cauda, terminando aproximadamente na mesma linha vertical, pelo padrao de colorido dorsal e ventral, e por possuir manchas distintas ventrais no disco. Adultos sao aparentemente associados a recifes coralinos ou areniticos.

The southwestern Atlantic Stingray Dasyatis macrophthalma Gomes, Rosa, and Gadig was described under two different names which appeared in the original publication by mistake. By using the First Reviser principle, according to the provisions of the International Code of Zoological Nomenclature, we select Dasyatis marianae as the valid name for the species. The name D. macrophthalma previously had been published by other authors in its homonym form D. macrophtalma, without reference to a formal description (a nomen nudum). It is herein treated as the junior objective synonym of D. macrophthalma. To avoid the repetition of similar cases, we recommend the authors preparing descriptions of new taxa refrain from publicizing manuscript names in the Web, scientific meetings, news media, or museum labels.