| details |
Early Lochkovian |
|
England(Shropshire) |
Edwards,D. et al. Tetrads in sporangia and spore masses from Upper Silurian and Lower Devonian of the Welsh Borderland |
1999 |
| original |
Early Llandoverian |
|
Egypt |
Schrank,E. Palaeozoic and Mesozoic palynomorphs from northeast Africa (Egypt and Sudan) with special reference to Late Cretaceous pollen and dinoflagellates. |
1987 |
| details |
Early Gothlandian |
|
Canada(Ontario) |
Eley,B.E. et al. Cherts of Southern Ontario |
1989 |
| details |
Early Devonian |
|
England(Herefordshire) |
Richardson,J.B. Abnormal spores and possible interspecific hybridization as a factor in the evolution of Early Devonian land plants |
1996 |
| details |
Early Devonian |
|
England(Shropshire) |
Richardson,J.B. Abnormal spores and possible interspecific hybridization as a factor in the evolution of Early Devonian land plants |
1996 |
| details |
Early Arenigian |
|
Argentina(Salta) |
Vergel,M.D.M. et al. Ordovician palynomorphs of Argentina: An integrated approach. (Aspects of the Ordovician System in Argentina.) |
2002 |
| details |
Ashgillian |
Early Devonian |
England(Shropshire) |
Edwards,D. et al. Hepatic characters in the earliest land plants. |
1995 |
| details |
Ashgillian |
Late Llandoverian |
|
Rubinstein,C.V. Silurian acritarchs from South America: A review. |
1996 |