| details |
Late Tremadocian |
Early Arenigian |
Turkey |
Martin,F. Recognition of the acritarch-Based "Trifidum flora" (Ordovician) in the absence of the Eponymous species |
1996 |
| details |
Late Tremadocian |
Arenigian |
Nd |
Molyneux,S.G. et al. Paleozoic phytoplankton. (Principles and Applications. Applications. J.Jansonius and D.C.McGregor, editors.) |
1996 |
| details |
Late Tremadocian |
|
Germany(Rostock) |
Servais,T. et al. The "messaoudensis-trifidum" acritarch assemblage (Ordovician: Tremadoc-Early Arenigian) from the subsurface of Rugen (Baltic Sea, northeast Germany). |
1997 |
| details |
Hunneberg |
|
Russia(St.Petersburg) |
Raevskaya,E.G. Early Arenig acritarchs from the Leetse Formation (St. Petersburg region, northwest Russia) and their palaeogeographic significance. |
1999 |
| details |
Late Tremadocian |
Early Arenigian |
S.Ireland(Kerry) |
Connery,C. et al. Tremadoc-Arenig acritarchs from the Annascaul Formation, Dingle Peninsula, County Kerry, Ireland. |
1999 |
| details |
Late Tremadocian |
Early Arenigian |
S.Ireland(Kerry) |
Todd,S.P. et al. An Early Ordovician age for the Annascaul Formation of the southeast Dingle Peninsula southwest Ireland. |
2000 |
| details |
Late Arenigian |
|
Pakistan |
Quintavalle,M. et al. Lower to Middle Ordovician acritarchs and chitinozoans from northern Karakorum Mountains, Pakistan. |
2000 |
| details |
Late Tremadocian |
Early Arenigian |
Spain |
Servais,T. et al. The messaoudensis-trifidum acritarch assemblage (Ordovician: Late Tremadoc - Early Arenig) of the Barriga Shale Formation, Sierra Morena (southwest Spain). |
2000 |
| details |
Late Tremadocian |
Early Arenigian |
Norway |
Ribecai,C. et al. Acritarchs from the Ordovician of the Oslo Region, Norway. |
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 |
| details |
Late Cambrian |
Early Ordovician |
Algeria |
Stricanne,L. et al. A statistical approach to classification of the Cambro-Ordovician galeate acritarch plexus |
2002 |
| details |
Early Arenigian |
Middle Arenigian |
Argentina(La Rioja) |
Vergel,M.D.M. et al. Ordovician palynomorphs of Argentina: An integrated approach. (Aspects of the Ordovician System in Argentina.) |
2002 |
| details |
Late Tremadocian |
Early Arenigian |
Argentina(Salta) |
Vergel,M.D.M. et al. Ordovician palynomorphs of Argentina: An integrated approach. (Aspects of the Ordovician System in Argentina.) |
2002 |
| details |
Tremadocian |
Arenigian |
Argentina(La Rioja) |
Rubinstein,C.V. Ordovician acritarchs from northwestern Argentina: new insights into the biostratigraphy and paleonvironmental aspects of the Central Andean Basin and Famatina. (In: Ordovician from the Andes. G.L.Albanesi,M.S.Beresi,S.H.Peralta,editors) |
2003 |