| details |
Llanvirnian |
|
Morocco |
Rahmani,K. Palynologic study of Paleozoic (Ordovician, Silurian, Devonian) of the Rabat Region, (Oued Bou-Regreg), Morocco. |
1983 |
| details |
Caradocian |
Early Ashgillian |
Morocco |
Elaouad-Debbaj,Z. Chitinozoa from the Lower Ktaoua Formation, Upper Ordovician of the Anti-Atlas, (Morocco). |
1986 |
| details |
Oeland |
Early Virgulian |
Estonia |
Nolvak,J. Biostratigraphy: Ordovician chitinozoans |
1990 |
| details |
Late Ashgillian |
|
Morocco |
Soufiane,A. et al. Chitinozoa assemblages from the Ordovician Tadla Basin, Morocco. |
1993 |
| details |
Early Caradocian |
Middle Caradocian |
Tennessee |
Siesser,W.G. et al. Caradocian chitinozoans from the Central Basin, Tennessee |
1998 |
| details |
Llanvirnian |
Early Caradocian |
W.Germany(Rhineland) |
Paris,F. et al. A revised chitinozoan classification |
1999 |