| details |
Ashgillian |
|
China(Sinkiang Uighur) |
Wang,Y. et al. Latest Ordovician Cryptospores from Southern Xinjiang, China |
1997 |
| details |
Ashgillian |
Llandoverian |
England(Shropshire) |
Edwards,D. et al. Tetrads in Sporangia and spores Masses from the Upper Silurian and Lower Devonian of the Welsh Borderland |
1999 |
| details |
Ashgillian |
Llandoverian |
China(Zhejiang) |
Yin,L. et al. Palynomorphs from the transitional sequences between Ordovician and Silurian of northwestern Zhejiang, South China. |
2000 |
| details |
Ashgillian |
|
Belgium |
Steemans,P. Ordovician cryptospores from the Oostduinkerke Borehole, Brabant Massif, Belgium. |
2001 |