Chengjiang

It was believed that the first vertebrate animals evolved during the Ordovician Period (443-490 mya) or possible late in the Cambrian Period (490 mya). Two fossils were recently discovered in Chengjiang China by Chinese paleontologists of fish species similar to the modern day hagfish and lampreys. The rock these fish were found are dated at 530 million years old, very early in the Cambrian Period and about 50 million years before it was believed fish had evolved. This discovery has caused scientists to rethink the evolution of vertebrates. These fish actually predate the assumed ancestors of the fish.
Source: http://www.ancient-hebrew.org/ancientman/07_cambrian.html
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This page was last updated on: 2/7/2011
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