1) Burgess Shale animal
Found on
https://www.crosswordclues.com/clue/cambrorhytium
Cambrorhytium is an enigmatic fossil genus known from the Latham shale (California), and the Chengjiang (China) and Burgess Shale (Canadian rockies) lagerstätte {gpb abundance|350|0.7} The fossil is conical, with iterated linear markings on its walls, parallel to its base. Its wall is thin, and it lacks the keel that is distinctive of hyoliths. I...
Found on
http://en.wikipedia.org/wiki/Cambrorhytium
No exact match found.
