| original |
Middle Siegenian |
|
France(Rhone) |
Moreau-Benoit,A. On some chitinozoans from the Lower Devonian of Anjou. |
1967 |
| original |
Ordovician |
|
France(Orne) |
Robardet,M. et al. A brief account of the chitinozoans from the Ordovician and Silurian of Cotentin, (Normandy-France). |
1971 |
| original |
Caradocian |
|
France(Manche) |
Robardet,M. et al. The Pont-de-Caen Formation (Carodocian) in the Domfront and Sees Synclines (Normandy). |
1972 |
| original |
Middle Siegenian |
|
France(Bretagne) |
Moreau-Benoit,A. Palynological and planktonic research on the Devonian and some Silurian formations of the southeast Massif Armoricain. |
1974 |
| original |
Late Caradocian |
Early Ashgillian |
Saudi Arabia |
Paris,F. et al. Ordovician chitinozoans from central Saudi Arabia. |
2000 |