- Author:
- Sweet,A.R.;Hills,L.V.
- Year:
- 1971
- Title:
- Evolution of Azolla and Azollopsis during the Upper Cretaceous and Lower Tertiary.
- Reference:
- Sweet,A.R. et al. (1971) Evolution of Azolla and Azollopsis during the Upper Cretaceous and Lower Tertiary. American Journal of Botany Vol. 50 # 5 P. 473- 473
- Google Academy:
- try to search by title in english
| Genus | Species | Country(Region) | From | To |
|---|---|---|---|---|
| Azolla | Azolla | Canada(Alberta) | Cretaceous | Early Paleocene |
| Azolla | Azolla conspicua | Canada(Alberta) | Cretaceous | Early Paleocene |
| Azollopsis | Azollopsis | Canada(Alberta) | Cretaceous | Early Paleocene |
| Azollopsis | Azollopsis sp | Canada(Alberta) | Cretaceous | Early Paleocene |