In this paper we report the first occurrence of two rare spider crabs (Majoidea) from Brazil, with additional morphological information based on material collected in the upper continental slope of the Potiguar Basin, northeast of Brazil. Lepteces ornatus Rathbun, 1893 (Epialtidae), originally described from the Gulf of Mexico and also reported from Uruguay, is now recorded from Brazilian waters (off Rio Grande do Norte), whereas Collodes leptocheles Rathbun, 1894 (Inachoididae) was considered for a long time as an endemic species of Gulf of Mexico and herein is being recorded for the first time in the Southern Atlantic.
Keywords: Crustacea, Inachoididae, Pisinae, Potiguar Basin, South Atlantic.