original |
Late Caradocian |
Early Ashgillian |
Canada(Anticosti Island) |
Achab,A. Chitinozoa from the Dicellograptus complanatus zone, Vaureal Formation (Upper Ordovician) Ile d'Anticosti, Quebec. |
1977 |
original |
Llanvirnian |
|
Europe |
Paris,F. The chitinozoans in the Paleozoic of Southwest Europe. |
1981 |
original |
Wenlockian |
|
Spain |
Schweineberg,J. Silurian chitinozoa from the Palencia Province (Cantabrian Mountains, North Spain). |
1987 |
original |
Early Ordovician |
Middle Ordovician |
USSR(Dzhambulskaya) |
Zhemchuzhnikov,V.G. et al. The position of the Dzhanytas series in the Lesser Karatau section in connection with the discovery of chitinozoans |
1989 |
original |
Llanvirnian |
|
Libya |
Abuhmida,F. et al. Palynostratigraphy and paleoenvironmental study of Middle and Upper Ordovician sequences in NW Sirt Basin, Libya. (In: Ordovician from the Andes. G.L.Albanesi,M.S.Beresi,S.H.Peralta,editors) |
2003 |