And the rest of the story. . .
Early tetrapods diversified into a large and rather bewildering array of forms in the Mississippian and Pennsylvanian.
Exactly how theyíre interrelated is a contentious matter. Most are extinct.
One lineage included the rootstock of the Lissamphibiaóthe living amphibians.
Another, the anthracosaurs, led to amniotes (reptiles, birds, mammals)