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SlideshowReport

Phylogenetic tree of the vertebrates

Description
The tetrapod vertebrates (bracketed in green) form one monophyletic group including birds, crocodilians, turtles, reptiles, mammals, and amphibians. Their unique common ancestor is circled in green. “Fish”—lampreys, cartilaginous fishes, ray-finned fishes, and lobe-finned fishes ? are not a monophyletic group. Adapted from the Center for North American Herpetology (2010).
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