Species of Pseudorthoceras present in the Pennsylvanian of the American Midcontinent
Desmoinesian to Virgilian; Extinct.
Texas to Missouri.
- Lawrence Formation (Haskell Limestone Member) (KS)
- Stranger Formation (Vinland Shale Member) (KS)
- Stranger Formation (Weston Shale Member) (KS)
- Dennis Limestone (Winterset Limestone Member) (MO)
- Drum Limestone (KS)
- Wyandotte Limestone (Farley Limestone Member) (KS)
- Boggy Formation (OK)
- East Mountain Shale (TX)
- Unknown Stage
- Cherokee Shale (KS)