1) Burgess Shale fossil
Found on
https://www.crosswordclues.com/clue/thaumaptilon
Thaumaptilon is a fossil from the middle Cambrian Burgess Shale which some authors have compared to members of the Ediacaran biota, generally believed to have disappeared at the start of the Cambrian, {Ma|542}. It was up to 20 cm long, and attached itself to the sea floor with a holdfast. Leaf-shaped, Thaumaptilon had a central axis extending to i...
Found on
http://en.wikipedia.org/wiki/Thaumaptilon
No exact match found.
