During Which Period Did the First Vertebrates Appear?
Vertebrates Appear to Have Radiated in the Late Ordovician, About 450 Million Year's Ago. in Which Time Period Did the Ancestors of Most Animals Including That...
Vertebrates appear to have radiated in the late Ordovician, about 450 million years ago.
In which time period did the ancestors of most animals including that of vertebrates show up in the fossil record?
Between 620 and 550 million years ago (during the Vendian Period) relatively large, complex, soft-bodied multicellular animals appear in the fossil record for the first time.
Where did the first vertebrates evolved?
But predictions based on the fossil data that do exist suggest all the various forms of the first vertebrates, from jawless fish to bony fish, originated in shallow environments near shore, researchers report today (October 25) in Science.
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