Shape-shifters found in the Belt Supergroup: Revelations about Tappania plana

The rise of eukaryotic organisms (organisms with complex cells, or a single cell with a complex structure) is still a mystery, but researchers have compelling evidence that Tappania plana may represent one of the earliest eukaryotic fossils. Well-preserved Tappania plana fossils from a Montana field site could be a crown-group eukaryote, providing one of the first links from this period in the fossil record to extant eukaryotes.
Paleontology News — ScienceDaily