All Precambrian Fossil Animal Genera

Precambrian Fossil Animal Genera is a Browse By group of the Nature Atlas that gathers genera of fossil animals from the Precambrian, the long span of time before the Cambrian period, whose own cited article treats them as animals rather than as problematic fossils of unknown kind, such as Keretsa, a bilaterian from the Late Precambrian Zimnie Gory Formation on the White Sea coast of Russia whose body has a headshield, a trunk shield and a pair of antenna-like structures. An entry belongs here when its own cited article describes an animal genus from rocks older than the Cambrian. It excludes the Cambrian animal genera and the problematic Ediacaran fossils, which have groups of their own. The group lets a reader find the earliest animals with a recognisable body plan.