original |
Middle Ordovician |
Late Ordovician |
Oklahoma |
Wilson,L.R. et al. Chitinozoa in the Tulip Creek Formation, Simpson Group (Ordovician), of Oklahoma. |
1964 |
original |
Caradocian |
|
Sweden |
Laufeld,S. Caradocian chitinozoa from Dalarna, Sweden. |
1967 |
original |
Caradocian |
|
Portugal |
Paris,F. Chitinozoans of the Louredo Formation, Upper Ordovician of the Bucaco Syncline, (Portugal). |
1979 |
original |
Middle Wenlockian |
Early Ludlovian |
Belgium |
Verniers,J. The Silurian chitinozoa of the Mehaigne area (Brabant Massif, Belgium). |
1982 |
original |
Late Wenlockian |
|
USSR(Estonian SSR) |
Nestor,V. Chitinozoan Zonal Assemblages, (Wenlock, Estonia). |
1982 |
original |
Arenigian |
|
Australia(Queensland) |
Playford,G. et al. Chitinozoa from Lower Ordovician strata of the Georgina Basin, Queensland, (Australia). |
1988 |
original |
Llandoverian |
|
China(Szechwan) |
Fang,X. et al. Silurian microflora and chitinozoa in Guanyinqiao Qijiang County Sichuan Province and their stratigraphic significance |
1988 |
original |
Gorstian |
|
Belgium |
Andre,L. et al. Guidebook to the excursion on the stratigraphy and Magmatic Roc of the Brabant Massif, Belgium. |
1991 |
original |
Kosovian |
|
Czechoslovakia |
Dufka,P. et al. Chitinozoans and acritarchs from the Ordovician - Silurian boundary of the Prague Basin, Czech Republic. (In: Contributions to Acritarch and Chitinozoan Research. S.G.Molyneux and K.J.Doring, editors) |
1993 |
original |
Kukruse |
|
USSR(Estonian SSR) |
Grahn,Y. et al. Precise chitinozoan dating of Ordovician impact events in Baltoscandia. |
1996 |
original |
Mohawkian |
|
Canada(New Brunswick) |
Asselin,E. et al. Biostratigraphic significance of lower Paleozoic microfaunas from eastern Canada. |
2004 |
original |
Mohawkian |
|
Canada(Quebec) |
Asselin,E. et al. Biostratigraphic significance of lower Paleozoic microfaunas from eastern Canada. |
2004 |