| details |
Llandoverian |
|
Ohio |
Grahn,Y. Llandoverian and Early Wenlockian chitinozoa from Southern Ohio and northern Kentucky, USA. |
1985 |
| details |
Late Rhuddanian |
Aeronian |
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 |
Middle 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 |
Llandoverian |
Wenlockian |
USSR(Estonian SSR) |
Bassett,M.G. et al. The Baltic Region. (In: A Global Standard for the Silurian System. C.H. Holland and M.G.Bassett, editors) |
1989 |
| details |
Middle Llandoverian |
|
Estonia |
Nestor,V. Biostratigraphy: Silurian chitinozoans |
1990 |
| details |
Middle Llandoverian |
|
Estonia |
Nestor,N. Locality 9:1 Silurian sequences at Sarghaua Field Station |
1990 |
| details |
Aeronian |
|
China(Hupei) |
Geng,L.-Y. et al. Rhuddanian and Aeronian chitinozoans from Dazhongba of Yichang, Western Hubei. |
1995 |