- Author:
- Dimichele,W.A.;Mahaffy,J.F.;Phillips,T.L.
- Year:
- 1979
- Title:
- Lycopods of Pennsylvanian age Coals
- Reference:
- Dimichele,W.A. et al. (1979) Lycopods of Pennsylvanian age Coals Canadian Journal of Botany Vol. 57 # 16 P. 1740- 1753
- Google Academy:
- try to search by title in english
| Genus | Species | Country(Region) | From | To |
|---|---|---|---|---|
| Valvisisporites | Valvisisporites nigrozonalis | Kentucky | Middle Pennsylvanian | |
| Valvisisporites | Valvisisporites nigrozonalis | Indiana | Middle Pennsylvanian |