Morphology of the western Atlantic haliotidae (Gastropoda, Vetigastropoda) with description of a new species from Brazil

Haliotis aurantium, new species, is described from the southeastern coast of Brazil and compared morphologically with Haliotis pourtalesii, which inhabits the Gulf of Mexico and the Caribbean Sea. These species differ mainly in characters of the head, epipodium, metapodium and digestive system. The species are also compared anatomically with other species of Haliotis based on published descriptions and on comparative dissections of H. lamellosa and H. tuberculata.