Description

Beloitoceras plebium
Nautiloid
Ordovician
Platteville Group – Grand Detour
Rock County, Wisconsin, USA

Big 125mm plate with 70mm nautiloid and partials.

Cephalopod.

Beloitoceras is a genus of nautiloid known from the Ordovician of various parts of the world (North America, Europe, China, and Australia).  It lived at a time when nautiloids were becoming the apex predators of the seas.

And yes, it was named in honor of Beloit, Wisconsin, one of the jewels of the Upper Midwest.