Phylogenetic tree showing the main vertebrate groups

Phylogenetic tree showing the main vertebrate groups

With the exception of tetrapods, which only appeared at the end of the Devonian, vertebrates were represented by fishes during that geologic time period. In this phylogenetic tree showing the evolutionary relationships among vertebrates, the most primitive forms are at the top and the most evolved at the bottom. Only Myxinoidae and Arandaspidida lack Devonian representatives.

Miguasha National Park

© Miguasha National Park 2007


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