Emergence of the first tetrapods
390 - 360 million BCE • Earth
"Tetrapods evolved from a finned organism that lived in the water" during the Devonian Period. "During this interval, this lineage of fleshy-finned organisms moved from the water to the land. Many parts of the skeleton changed as new innovations that permitted life on land evolved."
"Macroevolution through evograms: The origin of tetrapods," UC Museum of Paleontology Understanding Evolution.
Image: U.S. Geological Survey via Flickr, CC BY 2.0 DEED, Attribution 2.0 Generic
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