A new species of deep-water skate, Breviraja africana sp. n. (Pisces, Batoidea, Rajidae), from the eastern central Atlantic slope, and remarks on the taxonomic status of Breviraja Bigelow & Schroeder, 1948. Bulletin du Muséum National d'Histoire Naturelle, (Série 4), Section A, Zoologie Biologie et Ecologie Animales, 5(3), 903–925