| details |
Tournaisian |
|
England |
Smith,D.L. The spores of Alcicornopteris Hallei Walton. |
1962 |
| details |
Tournaisian |
|
England |
Smith,D.L. The spores of Alcicornopteris Hallei Walton. |
1962 |
| details |
Tournaisian |
|
England |
Smith,D.L. The spores of Alcicornopteris Hallei Walton. |
1962 |
| details |
Tournaisian |
|
England |
Smith,D.L. The spores of Alcicornopteris Hallei Walton. |
1962 |
| details |
Early Carboniferous |
|
Nd |
Millay,M.A. et al. Paleozoic seed fern pollen organs. |
1979 |
| details |
Carboniferous |
|
Scotland |
Balme,B.E. Fossil in situ, spores and pollen grains: An annotated catalogue. |
1995 |