| original |
Givetian |
|
Illinois |
Collinson,C. et al. Chitinozoan faunule of the Devonian Cedar Valley Formation. |
1958 |
| details |
Middle Devonian |
Late Devonian |
France(Manche) |
Doubinger,J. et al. Discovery of micro-organisms in the Red Series of Monmartin, (Manche), attribution of this series to the Middle or Upper Devonian. |
1964 |
| details |
Coblenzian |
|
Romania |
Raileanu,G. et al. Study of the Devonian in the Drilling at Mangalia. |
1964 |
| details |
Nd |
|
Nd |
Urban,J.B. A reexamination of chitinozoa from the Cedar Valley Formation of Iowa with observations on their morphology and distribution. |
1972 |
| details |
Early Devonian |
Middle Devonian |
Nd |
Taugourdeau,P. The chitinozoa. |
1979 |