| details |
Ordovician |
Silurian |
Baltic |
Eisenack,A. Chitinozoa of the Baltic Region. |
1968 |
| details |
Early Ordovician |
Middle Ordovician |
Sweden |
Eisenack,A. The microfauna of the Ostseekalke. 1. Chitinozoa, Hystrichosphaeres. |
1965 |
| details |
Early Llanvirnian |
Middle Llandeilian |
USSR(Estonian SSR) |
Grahn,Y. Ordovician chitinozoa from Tallinn, Norther Estonia. |
1984 |
| details |
Late Llanvirnian |
Llandeilian |
Sweden |
Grahn,Y. Middle Ordovician chitinozoa from Oland |
1981 |
| details |
Middle Ordovician |
Late Ordovician |
Europe |
Taugourdeau,P. et al. Chitinozoans-Illustrated bibliographic analysis |
1967 |
| details |
Late Arenigian |
Early Llanvirnian |
Sweden |
Grahn,Y. Chitinozoophoran palaeoecology in the Ordovician of Oland |
1982 |
| details |
Late Ordovician |
Early Gothlandian |
Canada(Anticosti Island) |
Achab,A. Biostratigraphy of the chitinozoa of Upper Ordovician - Lower Silurian of Anticosti Island. Preliminary results. |
1981 |
| details |
Late Ordovician |
Early Gothlandian |
USSR(Pskov) |
Nolvak,J. et al. The Taucionys Formation (Holorhynchus Beds) in the Iljinskoje Boring (Pskov District). |
1989 |
| details |
Maysvillian |
Early Gamachian |
Greenland |
Grahn,Y. et al. Chitinozoans from Ordovician and Silurian Shelf and Slope sequences in North Greenland. (In: Palaeozoic fossils and stratigraphy from North Greenland) |
1989 |
| details |
Late Caradocian |
Early Ashgillian |
Europe |
Jenkins,W.A.M. et al. Stratigraphic ranges of selected chitinozoa. |
1979 |
| details |
Late Caradocian |
Early Ashgillian |
North America |
Jenkins,W.A.M. et al. Stratigraphic ranges of selected chitinozoa. |
1979 |
| details |
Caradocian |
Early Ashgillian |
Sweden |
Grahn,Y. Caradocian and Ashgillian chitinozoa from the subsurface of Gotland |
1982 |
| details |
Llandeilian |
Caradocian |
USSR(Taldy-Kurganskaya) |
Zaslavskaya,N.M. et al. Ordovician chitinozoa of South Djungaria. (In: Problematic Fossils of the USSR. B.S.Sokolov, editors) |
1990 |
| details |
Middle Arenigian |
Caradocian |
Europe |
Taugourdeau,P. Techniques of study, morphology and classification of chitinozoans. |
1966 |
| details |
Caradocian |
Ashgillian |
Canada(Quebec) |
Martin,F. Some Upper Ordovician chitinozoans and acritarchs from the White Head Formation of Gaspe, Quebec. Gaspesie, Quebec. |
1980 |
| details |
Late Caradocian |
Ashgillian |
Canada(Arctic) |
Achab,A. et al. Ordovician chitinozoans from the Arctic Platform and the Franklinian Miogeosyncline in northern Canada |
1995 |
| details |
Nd |
|
Nd |
Obut,A.M. On the geographical distribution, comparative morphology, ecology, phylogeny, and the taxonomic position of chitinozoa. |
1973 |