1.6" Ordovician, Oncoceratid (Richardsonoceras) Fossil - Wisconsin

This is a 1.6" long example of a Middle Ordovician fossil Oncoceratid (Richardsonoceras simplex) from Wisconsin. This fossil is part of an old collection from the Grand Detour Formation in Rock County.

Oncoceratids are curved nautiloid cephalopods that have been identified from the Middle Ordovician, up to Late Silurian. Richardsonoceras is known for having a stronger convex curvature than other cephalopods in the family Oncoceratidae.

DETAILS
SPECIES
Richardsonoceras simplex
LOCATION
Rock County, Wisconsin
FORMATION
Grand Detour Formation
SIZE
Fossil 1.6" long
CATEGORY
ITEM
#173924
GUARANTEE
We guarantee the authenticity of all of our
specimens. Read more about our
Authenticity Guarantee.