| original |
Tremadocian |
|
Algeria |
Deunff,J. A microplankton of hystrichospheres in the Tremadocian of the Sahara. |
1961 |
| details |
Ordovician |
|
Nd |
Servais,T. Some considerations on acritarch classification |
1996 |
| details |
Late Cambrian |
|
USSR(Arkhangelsk Oblast) |
Volkova,N.A. Paleogeography of phytoplankton at Cambrian-Ordovician boundary |
1997 |
| details |
Late Cambrian |
|
USSR(Leningrad) |
Volkova,N.A. Paleogeography of phytoplankton at Cambrian-Ordovician boundary |
1997 |
| details |
Late Cambrian |
|
Estonia |
Volkova,N.A. Paleogeography of phytoplankton at Cambrian-Ordovician boundary |
1997 |
| details |
Late Cambrian |
|
USSR(Yaroslav) |
Volkova,N.A. Paleogeography of phytoplankton at Cambrian-Ordovician boundary |
1997 |
| details |
Late Cambrian |
|
Russia |
Volkova,N.A. Paleogeography of phytoplankton at Cambrian-Ordovician boundary |
1997 |
| details |
Late Cambrian |
|
Estonia |
Volkova,N.A. Paleogeography of phytoplankton at Cambrian-Ordovician boundary |
1997 |
| details |
Late Cambrian |
|
Sweden |
Volkova,N.A. Paleogeography of phytoplankton at Cambrian-Ordovician boundary |
1997 |
| details |
Nd |
|
Nd |
Williams,G.L. et al. The Lentin and Williams Index of Fossil Dinoflagellates.1998 Edition. |
1998 |
| details |
Late Tremadocian |
Early Arenigian |
Estonia |
Paalits,I. Biostratigraphy: Acritarchs |
1990 |
| details |
Late Cambrian |
Tremadocian |
Canada(Alberta) |
Molyneux,S.G. et al. Paleozoic phytoplankton. (Principles and Applications. Applications. J.Jansonius and D.C.McGregor, editors.) |
1996 |
| details |
Late Arenigian |
Early Llanvirnian |
England(Cumberland) |
Cooper,A.H. et al. The stratigraphy, correlation, provenance and palaeogeography of the Skiddaw Group (Ordovician) in the English Lake District |
1995 |
| details |
Early Ordovician |
|
China(Hupei) |
Yin,L.-M. New forms of acritarch from Early Ordovician sediments in Yichang, Hubei, China. |
1994 |
| details |
Nd |
|
Nd |
Servais,T. et al. A discussion and proposals concerning the Lower Paleozoic "Galeate" acritarch Plexus |
1995 |
| details |
Tremadocian |
|
France(Aveyron) |
Fournier-Vinas,C. et al. Lower Ordovician and Cambrian acritarchs from the Mountains East of Laucaune, (Aveyron).Northern Slope of the Black Mountains. |
1977 |
| details |
Nd |
|
Nd |
Loeblich,A.R.,Jr. et al. Some new and revised organic-walled phytoplankton microfossil genera. |
1976 |