Missourian to Virgilian (also Permian); Extinct.
Texas to Missouri.
- Oread Formation (Kereford Limestone Member) (MO)
- Oread Limestone (KS)
- Cherryvale Shale (Westerville Limestone Member) (KS)
- Drum Limestone (KS)
- Drum Limestone (MO)
- Stanton Limestone (Rock Lake Shale Member) (KS)
- Stanton Limestone (Stoner Limestone Member) (KS)
- Unknown Stage
- Pueblo Formation (Camp Creek Shale Member) (TX)