| details |
Late Llanvirnian |
|
Wales |
Trythall,R.J.B. et al. Age and controls of Ironstone deposition (Ordovician) North Wales. |
1987 |
| details |
Ludlovian |
|
USSR(Tuvinskaya A.O.) |
Sheshegova,L.I. Phytoplankton of the Silurian from the Tuva, (the section of the "Elegest"). |
1975 |
| details |
Llanvirnian |
Early Caradocian |
USSR(Estonian SSR) |
Uutela,A. et al. Ordovician acritarchs from the Rapla borehole, Estonia |
1991 |
| details |
Llanvirnian |
|
Tunisia |
Vecoli,M. et al. Palynostratigraphy of Upper Cambrian-upper Ordovician intracratonic clastic sequences, North Africa. |
1999 |
| details |
Middle Ordovician |
|
Sweden |
Kjellstrжm,G. Middle Ordovician microplankton from the Grotlingbo borehole No.1 in Gotland, Sweden. |
1971 |
| details |
Caradocian |
|
Portugal |
Elaouad-Debbaj,Z. Late Ordovician acritarches of the Bucaco Syncline (Portugal); systematics-biostratigraphy-paleogeographic interests. |
1978 |
| details |
Harnagian |
|
Portugal |
Elaouad-Debbaj,Z. et al. Wallstructure of Aremoricanium rigaudae Deunff, 1955, (Acritarch, Ordovician). |
1980 |
| 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 |
Llandeilian |
|
Poland |
Gгrka,H. Middle Ordovician microplankton from Strabla (Poland). |
1980 |
| 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 |
Middle Ordovician |
|
Oklahoma |
Loeblich,A.R.,Jr. et al. North American species of the Ordovician acritarch genus Aremoricanium. |
1971 |
| details |
Early Paleozoic |
|
Nd |
Cramer,F.H. et al. Lower Paleozoic acritarchs. |
1979 |
| details |
Silurian |
|
Nd |
Sarjeant,W.A.S. Acritarchs; anellotubulates; dinoflagellates; hystrichospheres; melanosclerites; tasmanitids. (Edited by Fairbridge and Jablonsky) |
1979 |
| details |
Nd |
|
Nd |
Downie,C. et al. Bibliography and index of fossil dinoflagellates and acritarchs. |
1965 |
| details |
Llandoverian |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Paleozoic |
|
Nd |
Sarjeant,W.A.S. Fossil algae and modern rock-dating. |
1963 |