| details |
Early Guadalupian |
|
Oklahoma |
Clapham,W.B. Permian miospores from the Flowerpot Formation of western Oklahoma |
1970 |
| details |
Early Guadalupian |
|
Oklahoma |
Clapham,W.B. Nature and paleogeography of Middle Permian floras of Oklahoma from their pollen record |
1970 |
| details |
Artinskian |
Roadian |
Canada(Arctic) |
Bamber,E.W. et al. Appendix B.Fossil identification. (In: Reconnaissance and preliminary interpretation of Upper Devonian to Permian stratigraphy of North eastern Ellesmere Island, Canadian Arctic Archipelago-U.Mayr) |
1992 |