Inoceramus barabini

Geological Range

Campanian to Maastrichtian

Alabama to Montana

Maastrichtian: Fox Hills Formation (CO); Fox Hills Formation (WY); Pierre Shale (MT); Pierre Shale (SD); Pierre Shale (WY)
Campanian: Bearpaw Shale (Upper) (MT) [Campanian]; Pierre Shale (CO); Pierre Shale (MT); Pierre Shale (SD) [Campanian]; Pierre Shale (WY) [Campanian]
Unknown Stage: Eutaw Formation (MS); Hygiene Formation (CO); Pierre Shale (CO); Pierre Shale (MT); Pierre Shale (SD); Pierre Shale (WY); Rocky Ridge Formation (CO); Rotten Limestone (AL); Tepee Butte (WY)