The cirripeds sampled by the RV Marion Dufresne from the Vitória -Trindade seamounts (20°S, Brazil) and from depths down to 3442 meters include thirteen species: nine lepadomorphs, two verrucomorphs and two balanomorphs. Among these are two new species: Scillaelepas rhabdota n. sp. and Scillaelepas brasiliensis n. sp. S. rhabdota n. sp. has the capitular plates with strong, radial striae, the tergum has a straight apex and the rostrum is evenly curving. Scillaelepas brasiliensis n. sp. has the capitular plates with fine, radial striae and with a medial ridge, the tergum has the scutal surface smaller than carinal. Six species are new records from the southwestern Atlantic: Poecilasma aurantia Darwin, 1852, Glyptelasma carinatum (Hoek, 1883), Neoscalpellum debile (Aurivillius, 1898), Trianguloscalpellum regium (Wyville Thomson, 1873), Amigdoscalpellum aurivilli (Pilsbry, 1907), and Metaverruca recta (Aurivillius, 1898).
Cirripedia, Thoracica, new species, Brazil, southwestern Atlantic Ocean.