Craniata - fishes; amphibians; reptiles; birds; mammalscraniate, vertebrate - animals having a bony or cartilaginous skeleton with a segmented spinal column and a large brain enclosed in a skull or cranium Amniota - higher vertebrates (reptiles, birds and mammals) possessing an amnion during development Agnatha, superclass Agnatha - superclass of eel-shaped chordates lacking jaws and pelvic fins: lampreys; hagfishes; some extinct forms bird family - a family of warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings class Reptilia, Reptilia - class of cold-blooded air-breathing vertebrates with completely ossified skeleton and a body usually covered with scales or horny plates; once the dominant land animals Pisces - a group of vertebrates comprising both cartilaginous and bony fishes and sometimes including the jawless vertebrates; not used technically phylum - (biology) the major taxonomic group of animals and plants; contains classes |