| original |
Early Llandoverian |
|
USSR(Estonian SSR) |
Nestor,V.K. New chitinozoan species from the Lower Llandoverian of Estonia. |
1980 |
| details |
Middle Llandoverian |
Late Llandoverian |
USSR(Siberia) |
Zaslavskaya,N.M. Silurian of Siberian Platform chitinozoa |
1983 |
| details |
Late Llandoverian |
|
USSR(Estonian SSR) |
Nestor,V. Distribution of chitinozoans in the Late Llandoverian Rumba Formation (Pentamerus Oblongus Beds) of Estonia |
1984 |
| details |
Late Hirnantian |
Early Rhuddanian |
Worldwide |
Grahn,Y. Chitinozoan stratigraphy in the Ashgil and Llandovery. (In: A Global Analysis of the Ordovician-Silurian Boundary. L.R.M.Cocks and R.B.Rickards, editors) |
1988 |
| details |
Early Llandoverian |
|
USSR(Estonian SSR) |
Grahn,Y. Chitinozoan stratigraphy in the Ashgil and Llandovery. (In: A Global Analysis of the Ordovician-Silurian Boundary. L.R.M.Cocks and R.B.Rickards, editors) |
1988 |
| details |
Early Llandoverian |
|
Estonia |
Nestor,V. Biostratigraphy: Silurian chitinozoans |
1990 |
| details |
Late Rhuddanian |
|
China(Hupei) |
Geng,L.-Y. et al. Rhuddanian and Aeronian chitinozoans from Dazhongba of Yichang, Western Hubei. |
1995 |