| original |
Ludlovian |
Gedinnian |
Europe |
Paris,F. The chitinozoans in the Paleozoic of Southwest Europe. |
1981 |
| details |
Early Pridolian |
|
USSR(Ukrainian SSR) |
Paris,F. et al. Chitinozoa of the Silurian-Devonian boundary sections in Podolia, Ukraine |
1996 |
| details |
Ludfordian |
|
China(Kiangsu) |
Geng,L.-Y. et al. Chitinozoan biostratigraphy in China. |
2000 |
| details |
Late Pridolian |
Lochkovian |
Czech Republic |
Fatka,O. et al. Organic-walled microfossils at the Silurian/Devonian boundary stratotype (Klonk near Suchomasty, Barrandian area, Czech Republic). |
2003 |