Two Fossil Early Synapsids (IMAGE)

Proceedings of the National Academy of Sciences

Two Fossil Early Synapsids

Caption

Two fossil early synapsids. On the left is a pelycosaur (Ophiacodon FMNHPR454) and on the right is a therapsid (Procynosuchus FMNHPR4974).

Credit

Image courtesy of Jacqueline K. Lungmus.

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