Linked from
The 16 pages that link to Ediacaran biota, each with the reason it gives.
PaleobiologyBroader topic: These fossils bear on the early history of complex animal life.
PrecambrianBroader topic: These fossils document complex ecosystems near the Precambrian’s end.
SpongeRelated: Proposed sponge fossils from these deposits bear on how early animal life began.
ProterozoicBroader topic: These fossils document complex life shortly before the Proterozoic ended.