| details |
Llandoverian |
Wenlockian |
Guinea |
Villeneuve,M. et al. New palaeontological data from the Palaeozoic series of the Bove Basin, (Guinea, West Africa); Stratigraphical consequences. |
1989 |
| details |
Late Llandoverian |
Wenlockian |
USSR(Estonian SSR) |
Nestor,V. Chitinozoans at the Llandovery-Wenlock transition in the Jaagarahu core, Estonia. |
1993 |
| details |
Ordovician |
Silurian |
Baltic |
Eisenack,A. Chitinozoa of the Baltic Region. |
1968 |
| details |
Ludlovian |
Siegenian |
Poland |
Wrona,R.M. Upper Silurian-Lower Devonian chitinozoa from the subsurface of Southeastern Poland. |
1980 |
| details |
Late Pridolian |
Siegenian |
Poland |
Wrona,R.M. Upper Silurian-Lower Devonian chitinozoa from the subsurface of Southeastern Poland. |
1980 |
| details |
Llandoverian |
Pridolian |
Europe |
Paris,F. The chitinozoans in the Paleozoic of Southwest Europe. |
1981 |
| details |
Lochkovian |
Pragian |
Canada(Nova Scotia) |
Bouyx,E. et al. Biostratigraphy and paleobiogeography of the Silurian-Devonian the Maguma Zone, Nova Scotia, Canada. |
1997 |
| details |
Early Llandoverian |
Middle Llandoverian |
Kentucky |
Grahn,Y. et al. Chitinozoans from the Ordovician-Silurian boundary Beds in the eastern Cincinnati Region in Ohio and Kentucky |
1985 |
| details |
Early Llandoverian |
Middle Llandoverian |
Ohio |
Grahn,Y. et al. Chitinozoans from the Ordovician-Silurian boundary Beds in the eastern Cincinnati Region in Ohio and Kentucky |
1985 |
| details |
Wenlockian |
Ludlovian |
England(Shropshire) |
Dorning,K.J. Silurian chitinozoa from the type Wenlock and Ludlow of Shropshire, England. |
1981 |
| details |
Late Llandoverian |
Ludlovian |
Sweden |
Laufeld,S. Silurian chitinozoa from Gotland. |
1974 |
| details |
Middle Wenlockian |
Ludlovian |
Sweden |
Grahn,Y. Upper Silurian (Upper Wenlock-Lower Pridoli) chitinozoa and biostratigraphy of Skane, Southern Sweden. |
1996 |
| details |
Middle Wenlockian |
Ludlovian |
Sweden(Gotland) |
Grahn,Y. Upper Silurian (Upper Wenlock-Lower Pridoli) chitinozoa and biostratigraphy of Skane, Southern Sweden. |
1996 |
| details |
Early Wenlockian |
Late Wenlockian |
USSR(Estonian SSR) |
Nestor,V. Chitinozoan Zonal Assemblages, (Wenlock, Estonia). |
1982 |
| details |
Early Aeronian |
Late Telychian |
Sweden(Gotland) |
Grahn,Y. Lower Silurian chitinozoa and biostratigraphy of subsurface Gotland. |
1995 |
| details |
Early Aeronian |
Late Telychian |
Sweden(Gotland) |
Grahn,Y. Lower Silurian chitinozoa and biostratigraphy of subsurface Gotland. |
1995 |
| details |
Middle Gothlandian |
Late Gothlandian |
Spain |
Cramer,F.H. et al. Taxonomic considerations on the acritarchs of the Middle and Upper Silurian of northern Spain. |
1968 |