Contributions to the study of the comparative morphology of teeth and other relevant ichthyodorulites in living supra-specific taxa of Chondrichthyan fishes. Part B: Batomorphii No. 4a: Order Rajiformes - Suborder Myliobatoidei - Superfamily Dasyatoidea - Family Dasyatidae - Subfamily Dasyatinae - Genera: Amphotistius, Dasyatis, Himantura, Pastinachus, Pteroplatytrygon, Taeniura, Urogymnus and Urolophoides (incl. supraspecific taxa of uncertain status and validity), Superfamily Myliobatoidea - Family Gymnuridae - Genera: Aetoplatea and Gymnura, Superfamily Plesiobatoidea - Family Hexatrygonidae - Genus: Hexatrygon. Bulletin de l'Institut Royal des Sciences Naturelles de Belgique, Biologie, 68, 145–197
