Acoel Development
Early animal evolution Precambrian *Ediacarian (Vendian) biota *First animals Cambrian explosion *First shelled animals *Evolution of animal diversity.
Ediacaran and Cambriam Biota. Late Proterozoic Buildup (about 570 mya) For all of the 19th century and the first half of the 20th century, the Proterozoic.
Edicaria-Cambian (1)
Ediacaran and Cambriam Biota
