Species of Amphiscapha present in the Pennsylvanian of the American Midcontinent
Desmoinesian to Virgilian (also Permian); Extinct.
Texas to Kansas.
- Calhoun Shale (KS)
- Stotler Limestone (KS)
- Wood Siding Formation (Brownville Limestone Member) (KS)
- Brad Formation (Ranger Limestone Member) (TX)
- Graford Formation (TX)
- Graford Formation (Brownwood Shale Member) (TX)
- Nellie Bly Formation (OK)
- Holdenville Shale (OK)
- Wewoka Formation (OK)