| details |
Middle Arenigian |
|
Czechoslovakia |
Paris,F. et al. Arenigian chitinozoans from the Klabava Formation, Bohemia. |
1984 |
| details |
Middle Arenigian |
|
Gondwanaland |
Paris,F. The Ordovician chitinozoan biozones of the northern Gondwana Domain |
1990 |
| details |
Early Ordovician |
|
Worldwide |
Achab,A. Biogeography of Ordovician chitinozoa. (In: Advances in Ordovician Geology. C.R.Barnes and S.H.Williams, editors) |
1991 |
| details |
Late Tremadocian |
Arenigian |
China(Kiangsu) |
Geng,L.-Y. et al. Chitinozoan biostratigraphy in China. |
2000 |