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Back Blog The First Tetrapod - Tiktaalik
10 Mar 2012

The First Tetrapod - Tiktaalik

It's especially difficult to identify the first true tetrapod, given gaps in the fossil record and a blurring of the lines dividing lobe-finned fish from "fishapods" from true tetrapods. Tiktaalik lived during the late Devonian period (about 375 million years ago); its skeletal structure was more advanced than the lobe-finned fish that preceded it (such as Panderichthys), but less articulated than more advanced tetrapods like Acanthostega. It's as good a candidate as any for the first fish that crawled up out of the primordial ooze on four stubby legs!

Last modified on Monday, 03 June 2013 21:17

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