The last period of the Neoproterozoic Era, it ran from 630 to 542 million years ago and named after a South Australian range of hills (where some fossils of the Edicaran period were found in 1946). This period had few faunal fossils as animals had yet to form hard shells. But it does record the oldest definitive multicellular organisms with tissues - the most regular examples being segmented worms. This site gives an introduction to Ediacaran fauna.
No comments:
Post a Comment