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© 2003 James Diffily
© 2008 Royal Tyrrell Museum
© 2003 Spencer Lucas, New Mexico Museum of Natural History
What are Other Amphibians? Included here are extinct relatives of modern amphibians. They share some skull and limb modifications with living amphibians, but have their own distinct features. Members of this diverse group include a wide variety of forms, from the snake-like Aornerpeton (Aistopoda), which lacked limbs and had 230 vertebrae, to the newt-like Diplocaulus (Nectridea), which had a large, boomerang-shaped head. Most were aquatic, although some, like the Microsauria, were more adapted to terrestrial habitats and looked like small lizards. The oldest members of this group first appear in the Carboniferous, and the last members went extinct in the Permian.
First known fossil occurrence: Carboniferous.
Last known fossil occurrence: Permian.
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