Description
Arkansas Rayonnoceras Cephalopod
- Rayonnoceras solidiforma
- Mississippian Age
- Fayetteville Shale
- Washington County, Arkansas
- Natural specimen is still in the matrix that measures 6″ long.
- MORE Fossil Cephalopods for Sale
WHAT IS A RAYONNOCERAS?
Rayonnoceras is a genus of extinct cephalopods that lived around 325 million years ago during the Carboniferous.
WHAT DID THEY LOOK LIKE?
It is characterized by large straight shells with a large subcentral siphuncle composed of subglobular segments. They grew up to 8 feet long
