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 |
|
Canada(Newfoundland) |
Neville,R.S.W. Ordovician chitinozoa from Western Newfoundland. |
1974 |
original |
Late Gothlandian |
|
Australia(NSW) |
Dorning,K.J. Chitinozoan preservation and microbiota of the Silurian Quidong Formation, New South Wales, Australia. |
1977 |
original |
Caradocian |
|
Portugal |
Paris,F. Chitinozoans of the Louredo Formation, Upper Ordovician of the Bucaco Syncline, (Portugal). |
1979 |
original |
Llanvirnian |
|
Argentina(La Rioja) |
Volkheimer,W. et al. Ordovician chitinozoans from the type locality of the Gualcamayo Formation Southwest of the Guandacol, Precordillera of La Rioja, Argentina. |
1980 |
original |
Arenigian |
|
Europe |
Paris,F. The chitinozoans in the Paleozoic of Southwest Europe. |
1981 |
original |
Late Arenigian |
|
Canada(Quebec) |
Achab,A. Chitinozoans of the Upper Arenigian, (Zone D) of the Levis Formation, Quebec, Canada. |
1982 |
original |
Arenigian |
|
Australia(Queensland) |
Playford,G. et al. Chitinozoa from Lower Ordovician strata of the Georgina Basin, Queensland, (Australia). |
1988 |
original |
Early Ludlovian |
|
Estonia |
Rubel,M. Biostratigraphy: Composite standard |
1990 |
original |
Rhuddanian |
Early Aeronian |
Czechoslovakia(Bohemia) |
Dufka,P. Lower Silurian chitinozoans of the Prague Basin (Barrandian, Czechoslovakia)-Preliminary results. |
1992 |
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 |
Idavere |
|
Sweden |
Grahn,Y. et al. Precise chitinozoan dating of Ordovician impact events in Baltoscandia. |
1996 |
original |
Kukruse |
|
USSR(Estonian SSR) |
Grahn,Y. et al. Precise chitinozoan dating of Ordovician impact events in Baltoscandia. |
1996 |
original |
Late Caradocian |
Early Ashgillian |
Saudi Arabia |
Paris,F. et al. Ordovician chitinozoans from central Saudi Arabia. |
2000 |
original |
Early Aeronian |
|
Paraguay |
Grahn,Y. et al. Silurian and Lower Devonian chitinoan biostratigraphy of the Parana Basin in Brazil and Paraguay. |
2000 |
original |
Middle Caradocian |
|
Belgium |
Samuelsson,J. et al. Ordovician chitinozoan biozonation of the Brabant Massif, Belgium. |
2000 |