ammonites
Bolbocephalus jeffersonensis Cullison 1944 (trilobite)

Trilobita - Proetida - Bathyuridae

Belongs to Bolbocephalus according to Cullison 1944

Sister taxa: Bolbocephalus convexus, Bolbocephalus kindlei, Bolbocephalus myktos, Bolbocephalus stitti

Ecology: fast-moving low-level epifaunal deposit feeder