| original |
Middle Ordovician |
Late Ordovician |
Oklahoma |
Wilson,L.R. et al. Chitinozoa in the Tulip Creek Formation, Simpson Group (Ordovician), of Oklahoma. |
1964 |
| details |
Ordovician |
|
Missouri |
Echols,D.J. et al. Ordovician chitinozoa from Missouri. |
1966 |
| details |
Middle Ordovician |
Late Ordovician |
Oklahoma |
Taugourdeau,P. Techniques of study, morphology and classification of chitinozoans. |
1966 |
| details |
Arenigian |
Llandeilian |
USA |
Taugourdeau,P. Techniques of study, morphology and classification of chitinozoans. |
1966 |
| details |
Middle Ordovician |
|
North America |
Taugourdeau,P. et al. Chitinozoans-Illustrated bibliographic analysis |
1967 |
| details |
Middle Ordovician |
|
Asia |
Taugourdeau,P. et al. Chitinozoans-Illustrated bibliographic analysis |
1967 |
| details |
Middle Ordovician |
Late Ordovician |
Oklahoma |
Locquin,M.V. Thie Chitinomycetes of chitinozoa Paleozoic fossils |
1976 |
| details |
Llandeilian |
|
USSR(Ukrainian SSR) |
Zaslavskaya,N.M. et al. Chitinozoans in Ordovician and Silurian deposits of the Altai Mountains. (In: The Fauna and Biostratigraphy of Upper Ordovician and Silurian of the Altai-Sajan Region) |
1978 |
| details |
Arenigian |
|
Russia(Siberia) |
Sennikov,N.V. et al. Synthesis of the graptolite and chitinozoan scales for the Altai-Salair Ordovician Basin (Siberia, Russia). |
2003 |