An extinct reptile from the Permian period, considered an early ancestor of modern amphibians and reptiles.
From Greek 'arche-' (original, first) combined with 'saurus' (lizard). Named for being an 'original' or 'first' lizard in the evolutionary sense.
Archegosaurus was a creature that couldn't decide if it wanted to be a salamander or a crocodile—it lived 280 million years ago at the crossroads of amphibian-reptile evolution!
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