| original |
Barremian |
Aptian |
Maryland |
Skog,J.E. Pelletixia amelguita, a new species of fossil fern in the Potomac Group (Lower Cretaceous). |
1982 |
| details |
Barremian |
Aptian |
Maryland |
Dettmann,M.E. et al. Phylogeny and biogeography of Ruffordia, Mohria and Anemia (Schizaeaceae) and Ceratopteris (Pteridaceae): Evidence from in situ, and dispersed spores. |
1992 |
| details |
Cretaceous |
|
USA |
Balme,B.E. Fossil in situ, spores and pollen grains: An annotated catalogue. |
1995 |
| details |
Cretaceous |
|
Nd |
Playford,G. et al. Spores. (Principles and Applications. Applications. J.Jansonius and D.C.McGregor, editors.) |
1996 |