Lime Creek Formation
Cerro Gordo member
This is an extremely rare specimen because it has
the original shell. Internal molds are common.
Mark VanHeel collected this specimen and I was
fortunate to acquire it in trade.
The exterior of the gastropod shell has a nice
colony of an auloporid coral on it. The chambers
are too large to be a bryozoan, and the colony has
a typical auloporid shape.
It looks like the Floydia concentrica has a nice little
coral colony growing on it. I'm not sure what kind
they are but they resemble Syringopora of the
Pennsylvanian so that may put them in a family.
Dr. Roger Pabian
Other Fossils (USA and World Wide)