First vertebrates
Vertebrates originated about 525 million years ago during the Cambrian explosion, which saw rise in organism diversity. The earliest known vertebrate is believed to be Myllokunmingia.
What era did vertebrates first appear?
Vertebrates appear to have radiated in the late Ordovician, about 450 million years ago.
What was the first vertebrates on earth?
Jawless fish are the planet's first vertebrates and they probably evolved from a creature similar to sea squirts.
