Contributions to the study of the comparative morphology of teeth and other relevant ichthyodorulites in living supraspecific taxa of chondrichthyan fishes. Part A: Selachii. Addendum to 1: Order Hexanchiformes-Family Hexachidae, 2: Order Carcharhiniformes, 2a: Family Triakidae, 2b: Family Scyliorhinidae, 2c: Family Carcharhinidae, Hemigaleidae, Leptochariidae, Sphyrnidae, Proscylliidae and Pseudotriakidae, 3: Order Squaliformes: Family Echinorhinidae, Oxynotidae and Squalidae. Tooth vascularization and phylogenetic interpretation. Bulletin de l'Institut Royal des Sciences Naturelles de Belgique, Biologie, 73, 5–26
