- Author:
- Mamay,S.H.
- Year:
- 1950
- Title:
- Some American Carboniferous fern fructifications.
- Reference:
- Mamay,S.H. (1950) Some American Carboniferous fern fructifications. Annals of the Missouri Botanical Garden Vol. 37 P. 409- 476
- Google Academy:
- try to search by title in english
| Genus | Species | Country(Region) | From | To |
|---|---|---|---|---|
| Spore | Spore sp | Iowa | Desmoinesian | |
| Spore | Spore sp | Iowa | Desmoinesian | |
| Spore | Spore sp | Iowa | Desmoinesian |