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Back Blog The First Reptile - Hylonomus
20 Mar 2012

The First Reptile - Hylonomus

If you've gotten this far down the list, you may not be surprised to learn that the ultimate ancestor of dinosaurs, crocodiles and monitor lizards was the small, inoffensive Hylonomus ("forest dweller"), which lived in North America during the late Carboniferous period. The largest reptile of its time, by definition, Hylonomus weighed about a pound, and probably subsisted entirely on insects (which had only recently evolved themselves). By the way, some paleontologists claim that Westlothiana was the first reptile, but this creature was probably an amphibian instead.

Last modified on Monday, 03 June 2013 21:15

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