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Vertebrates

> Fishes | Early Tetrapods | Amphibians | Reptiles | Mammal Relatives | Mammals

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Helicoprion nevadensis
Helicoprion nevadensis
© 2004 UCMP

Protitanops
Protitanops
© 2002 public domain

Equus simplicidens
Equus simplicidens
© 2005 Greg McDonald

What are Vertebrates? Vertebrates, which include fish, birds, mammals, and more, are a very diverse group of animals. They come in all shapes and sizes, from the 8 millimeter-long goby (fish) to Argentinosaurus, a dinosaur that was 42 meters long. They live in all kinds of habitats, from the deep sea to the air, and from the tropics to the arctic. Some just have skin, but others have hair, feathers, scales, or other coverings. Vertebrates are chordates that have a backbone, and their fossil record extends back to the Cambrian.

Note: Their chordate relatives are discussed in Hemichordates and Chordates.

First known fossil occurrence: Cambrian.

Last known fossil occurrence: Quaternary. This group has living relatives.

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