New fossils shake up history of amphibians with no legs

Tiny skulls and other bits hint at unexpected backstory for today’s snake-shaped caecilians

illustration of Chinlestegophis

BACKSTORY WITH LEGS  Small and possibly living underground, the newly named extinct Chinlestegophis (artist’s illustration shown) still had legs but might be an ancient near-relative of today’s legless caecilian amphibians.

Jorge Gonzalez

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