The Neoproterozoic: revised
This painting by D. W. Miller, from the March-April, 1997 issue of American
Scientist, shows how new fossil finds have revised our understanding of
The frilled, shell-less snail at the lower right is Kimberella, thought
now to be one of the complex trace-makers of the late Neoproterozoic and
a possible ancestor of the phylum Mollusca.