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What if tetrapods evolved from cartilaginous fish instead of lobe-finned fish? - Quora
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What if tetrapods evolved from cartilaginous fish instead of lobe-finned fish? - Quora
What if tetrapods evolved from cartilaginous fish instead of lobe-finned fish? - Quora
Sarcopterygians: From Lobe-Finned Fishes to the Tetrapod Stem Group
Age of Animals
An ancient Australian air-breathing fish from 380 million years ago