Amphibia
(203)
Aves
(1281)
Fish
(145)
Mammalia
(1182)
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Reptilia
(186)
Urochordata
(4)
Gnathostomata
Philippe Janvier's article about the jawed vertebrates in the Tree of Life website.
Phylum Chordata
Brief introduction to the chordates, defined as organisms that possess a structure called a notochord, at least during some part of their development. Includes links to information about subgroups and representative animals.
Subphylum Vertebrata
What makes a vertebrate a vertebrate? They have more in common than a backbone. Find out more in this site from the Animal Diversity Web.
Chordata
Overview of the taxonomy of Phylum Chordata, which includes the well-known vertebrates (fishes, amphibians, reptiles, birds, mammals), hagfishes, tunicates, and lancelets.
Vertebrata
Introduction to the vertebrates and their classification, including the Hyperoartia, or lampreys, and the Gnathostomata, or jawed vertebrates.
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