| details |
Llanvirnian |
Early Caradocian |
USSR(Estonian SSR) |
Uutela,A. et al. Ordovician acritarchs from the Rapla borehole, Estonia |
1991 |
| details |
Llandeilian |
Caradocian |
Portugal |
Henry,J.L. et al. Interest in the stratigraphic and paleogeography of the microplankton and acritarchs found in the Ordovician of Serra de Bucaco, (Portugal). |
1971 |
| details |
Llanvirnian |
Caradocian |
Nd |
Diez,M.D.C.R. et al. Range chart of selected Lower Paleozoic acritarch Taxa. |
1974 |
| details |
Ashgillian |
|
Bulgaria |
Kalvacheva,R.K. Acritarch stratigraphy of Lower Paleozoic formations in the West Balkan Mountains, Bulgaria. |
1978 |
| details |
Early Paleozoic |
|
Nd |
Cramer,F.H. et al. Lower Paleozoic acritarchs. |
1979 |
| details |
Llandeilian |
|
Poland |
Gгrka,H. Middle Ordovician microplankton from Strabla (Poland). |
1980 |
| details |
Llandeilian |
|
Baltic |
Gгrka,H. Middle Ordovician microplankton from Strabla (Poland). |
1980 |
| details |
Silurian |
|
Nd |
Sarjeant,W.A.S. Acritarchs; anellotubulates; dinoflagellates; hystrichospheres; melanosclerites; tasmanitids. (Edited by Fairbridge and Jablonsky) |
1979 |
| details |
Llandeilian |
|
Poland |
Gгrka,H. The Middle Ordovician acritarchs of Olsztyn IG2, (Poland). |
1979 |
| details |
Middle Ordovician |
|
Oklahoma |
Tappan,H. The Paleobiology of Plant Protists. |
1980 |
| details |
Caradocian |
|
Portugal |
Elaouad-Debbaj,Z. Late Ordovician acritarches of the Bucaco Syncline (Portugal); systematics-biostratigraphy-paleogeographic interests. |
1978 |
| details |
Harnagian |
|
France(Finistere) |
Elaouad-Debbaj,Z. et al. Wallstructure of Aremoricanium rigaudae Deunff, 1955, (Acritarch, Ordovician). |
1980 |
| details |
Harnagian |
|
Portugal |
Elaouad-Debbaj,Z. et al. Wallstructure of Aremoricanium rigaudae Deunff, 1955, (Acritarch, Ordovician). |
1980 |
| details |
Early Caradocian |
|
France(Finistere) |
Henry,J.L. Micro-organisms incertae sedis (acritarchs and chitinozoans) of the Ordovician of the Crozon Peninsula (Finistere). Beds of Mort-Anglaise and Kerglintin. |
1969 |
| details |
Late Llanvirnian |
|
Wales |
Trythall,R.J.B. et al. Age and controls of Ironstone deposition (Ordovician) North Wales. |
1987 |
| details |
Nd |
|
Nd |
Downie,C. et al. Bibliography and index of fossil dinoflagellates and acritarchs. |
1965 |
| details |
Middle Ordovician |
|
Sweden |
Kjellstrжm,G. Middle Ordovician microplankton from the Grotlingbo borehole No.1 in Gotland, Sweden. |
1971 |