| original |
Late Arenigian |
|
Morocco |
Cramer,F.H. et al. Seven new Late Arenigian species of the acritarch genus Coryphidium Vavrdova,1972. |
1976 |
| details |
Middle Arenigian |
Late Arenigian |
Bulgaria |
Kalvacheva,R.K. Palynological evidence for the Early-Ordovician (Arenigian) age of ophiolites in the Botevgran District (West Balkan Mountain) Bulgaria. |
1982 |
| details |
Late Arenigian |
|
Bulgaria |
Kalvacheva,R.K. Palynology and stratigraphy of the Diavase-Phyllitoid complex in the West Balkan Mountains. |
1982 |
| details |
Arenigian |
Llanvirnian |
Morocco |
Marhoumi,M.R. et al. The microfossils, (chitinozoans and acritarchs) of the Schists of Tazekka, western Morocco. |
1982 |
| details |
Late Arenigian |
|
Bulgaria |
Kalvacheva,R.K. Acritarch evidence for Ordovician System in West Bulgaria |
1984 |
| details |
Arenigian |
Llanvirnian |
Morocco |
Fournier-Vinas,C. Ordovician acritarchs of Zekkara, (East Morocco). |
1985 |
| details |
Early Arenigian |
|
Wales |
Molyneux,S.G. Appendix: Acritarchs and chitinozoa from the Arenig series of southwest Wales. (In: The Arenig Series in South Wales: Stratigraphy and palaeontology.) |
1987 |
| details |
Late Arenigian |
|
Portugal |
Cunha,T.Q.E. et al. Acritarchs of the "Xistos Com Phyllodocites" Formation, Barrancos Region, southeast of Portugal. |
1988 |
| details |
Arenigian |
|
Italy(Sardinia) |
Albani,R. Ordovician, (Arenigian) acritarchs from the Solanas Sandstone Formation, Central Sardinia, Italy. |
1989 |
| details |
Late Arenigian |
Early Llanvirnian |
Spain |
Mette,W. Acritarchs from Lower Paleozoic rocks of the Western Sierra Morena, southwest Spain and biostratigraphic results. |
1989 |
| details |
Late Arenigian |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Arenigian |
Llanvirnian |
Portugal |
Oliveira,J.T. et al. English Title |
1991 |
| details |
Arenigian |
|
Austria |
Reitz,E. et al. Palynological evidence for Lower Ordovician rocks (Tremadoc and Arenig) in the northern Greywacke zone (Eastern Alps) |
1992 |
| details |
Arenigian |
|
Pakistan |
Le Fort,P. et al. Discovery of a Crystalline Basement and Early Ordovician marine transgression in the Karakorum Mountain range, Pakistan. |
1994 |
| details |
Arenigian |
|
Pakistan |
Tongiorgi,M. et al. Palynological dating (Arenig) of the sedimentary sequence overlying the Ishkarwaz Granite (Upper Yarkhun Valley, Chitral, Pakistan). |
1994 |
| details |
Llandoverian |
Wenlockian |
S.Ireland(Kildare) |
Maziane-Serraj,N. et al. Ordovician and Silurian acritarch assemblages from the west Leinster and Slievenamon areas of southeast Ireland. |
2000 |
| details |
Arenigian |
|
Iran |
Ghavidel-Syooki,M. Palynostratigraphy and paleobiogeography of the Lower Paleozoic sequence in the northeastern Alborz Range (Kopet-Dagh Region) of Iran. |
2001 |