Noun | 1. | ![]() Craniata, subphylum Craniata, subphylum Vertebrata, Vertebrata - fishes; amphibians; reptiles; birds; mammals cartilaginous fish, chondrichthian - fishes in which the skeleton may be calcified but not ossified Holocephali, subclass Holocephali - chimaeras and extinct forms Elasmobranchii, Selachii, subclass Elasmobranchii, subclass Selachii - sharks; rays; dogfishes; skates class - (biology) a taxonomic group containing one or more orders |