Species of Ulocrinus present in the Pennsylvanian of the American Midcontinent
Desmoinesian to Virgilian; Extinct.
Texas to Missouri.
- Harpersville Formation (TX)
- Oread Limestone (Toronto Limestone Member) (KS)
- Dennis Limestone (OK)
- Dennis Limestone (Winterset Limestone Member) (KS)
- Iola Limestone (KS)
- Plattsburg Limestone (KS)
- Stanton Limestone (OK, KS)
- Wyandotte Formation (Argentine Limestone Member) (MO)
- Wyandotte Formation (Frisbie Limestone Member) (MO)
- Mineral Wells Formation (TX)
- Oologah Limestone (OK)