NEOPROTEROZOIC ERA (1 000-541 Ma)
From Greek néos (new), próteros (first) and zõon (animal).

Main events: Ediacaran Fauna. Second, third and fifth global glaciations.

Lifeforms: the Ediacaran Fauna or Biota encompasses the first known complex multicellular organisms on earth, all of them marine, without skeleton or rigid parts.

Paleoenvironment: several global glaciations.