Missourian to Virgilian; Extinct.
Kansas to Nebraska.
- Oread Limestone (Kereford Limestone Member) (KS)
- Bonner Springs Shale (KS)
- Cherryvale Shale (Westerville Limestone Member) (KS)
- Dennis Limestone (Winterset Limestone Member) (MO)
- Drum Limestone (KS)
- Drum Limestone (MO)
- Unknown Stage
- Coal Measures (NE)