| original |
Late Tremadocian |
Early Arenigian |
China(Kirin) |
Martin,F. et al. Early Ordovician acritarchs from Southern Jilin Province, northeast China. |
1988 |
| details |
Early Ordovician |
|
Australia(W.Australia) |
Wicander,R. et al. Selected Early Ordovician acritarchs from the Barbwire terrace, Canning Basin, Western Australia. |
1988 |
| details |
Tremadocian |
|
Texas |
Barker,G.W. et al. Tremadocian (Lower Ordovician) acritarchs from the subsurface of West Texas |
1989 |
| details |
Nd |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Early Ordovician |
|
China(Hupei) |
Yin,L.-M. New forms of acritarch from Early Ordovician sediments in Yichang, Hubei, China. |
1994 |
| details |
Nd |
|
Nd |
Molyneux,S.G. et al. Paleozoic phytoplankton. (Principles and Applications. Applications. J.Jansonius and D.C.McGregor, editors.) |
1996 |
| details |
Late Tremadocian |
|
Texas |
Volkova,N.A. Paleogeography of phytoplankton at Cambrian-Ordovician boundary |
1997 |
| details |
Ordovician |
|
Nd |
Servais,T. An annotated bibliographical review of Ordovician acritarchs |
1997 |