| original |
Arenigian |
Middle Ordovician |
USSR(Yaroslav) |
Umnova,N.I. Distribution of chitinozoa in the Ordovician of the Russian Platform |
1964 |
| details |
Late Caradocian |
Early Llandoverian |
Europe |
Taugourdeau,P. Techniques of study, morphology and classification of chitinozoans. |
1966 |
| details |
Late Caradocian |
Early Llandoverian |
Africa(Sahara) |
Taugourdeau,P. Techniques of study, morphology and classification of chitinozoans. |
1966 |
| details |
Late Ordovician |
|
France(Manche) |
Rauscher,R. et al. Associations of chitinozoans of Normandy and comparisons with fauna already described. |
1967 |