| details |
Middle Ordovician |
Early Gothlandian |
Nd |
Taugourdeau,P. The chitinozoa. |
1979 |
| details |
Late Caradocian |
|
Spain |
Robardet,M. et al. The Summit of the Ordovician in the Centre of the Iberia Peninsula |
1980 |
| details |
Early Llanvirnian |
|
Saudi Arabia |
Al-Hajri,S. Biostratigraphy of the Ordovician chitinozoa of Northwestern Saudi Arabia. (In: Palaeozoic Palynostratigraphy of the Kingdom of Saudi Arabia. B.Owens et al, editors) |
1995 |
| details |
Late Arenigian |
Caradocian |
Algeria |
Oulebsir,L. et al. Ordovician chitinozoa from Algeria: Biostratigraphy and paleogeography |
1995 |
| details |
Kukruse |
Johvi |
USSR(Estonian SSR) |
Grahn,Y. et al. Precise chitinozoan dating of Ordovician impact events in Baltoscandia. |
1996 |
| details |
Late Hirnantian |
|
Algeria |
Paris,F. et al. The effects of the final stages of the Late Ordovician glaciation on marine palynomorphs (chitinozoans, acritarchs, leiospheres) in Well NI-2 (northeast Algerian Sahara). |
2000 |