| original |
Late Ludlovian |
Early Gedinnian |
Spain |
Cramer,F.H. et al. Acritarchs from the San Pedro Formation (Upper Silurian) from Torrestio, Leon Province, Spain. |
1976 |
| details |
Late Llandoverian |
Ludlovian |
Turkey |
Erkmen,U. et al. Acritarchs from the Dadas Formation in Southeast Turkey. |
1979 |
| details |
Ludlovian |
Early Siegenian |
Spain |
Rodriguez Gonzalez,R.M. Palynology of the Upper Silurian-Lower Devonian Formations of the Cantabrica Cordillera, Northeast Spain. |
1983 |
| details |
Late Ludlovian |
Early Gedinnian |
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Late Gothlandian |
Early Devonian |
Spain |
Sarjeant,W.A.S. et al. The Micrhystridium and Veryhachium Complexes (Acritarcha: Acanthomorphitae and Polygonomorphitae): A taxonomic reconsideration. |
1994 |