| details |
Rhuddanian |
|
Estonia |
Loydell,D.K. et al. Integrated biostratigraphy of the lower Silurian of the Ohesaare core, Saaremaa, Estonia. |
1998 |
| details |
Early Silurian |
|
Iran |
Ghavidel-Syooki,M. Chitinozoan biostratigraphy and palaeogeography of Late Ordovician and Early Silurian strata at southwestern Bojnurd City in eastern Alborz Mountain Ranges (Kopet Dagh Region), Southeastern Caspian Sea. |
1998 |
| details |
Early Silurian |
|
Nevada |
Soufiane,A. et al. Upper Ordovician and Lower Silurian chitinozoans from central Nevada and Arctic Canada. |
2000 |