| original |
Late Arenigian |
Early Llanvirnian |
Poland |
Szaniawski,H. Systematic description of chitinozoa. (In: Chitinozoa from the Ordovician Conglomerates at Miedzygorz in the Holy Cross Mountains. R.Chlebowski and N. Szaniawski) |
1974 |
| original |
Late Arenigian |
|
Poland |
Chlebowski,R. et al. Chitinozoa from the Ordovician Conglomerates at Miedzygorz in the Holy Cross Mountains. |
1974 |
| details |
Late Arenigian |
Early Llanvirnian |
Poland |
Chlebowski,R. et al. Chitinozoa from the Ordovician Conglomerates at Miedzygorz in the Holy Cross Mountains. |
1974 |
| details |
Arenigian |
|
Baltic |
Nolvak,J. et al. Ordovician chitinozoan zones from Baltoscandia |
1993 |
| details |
Arenigian |
|
Scandinavia |
Nolvak,J. et al. Ordovician chitinozoan zones from Baltoscandia |
1993 |
| details |
Arenigian |
|
Baltic |
Lindstrom,M. et al. Post-impact deposits in Tvaren, a marine Middle Ordovican Crater Southern of Stockholm, Sweden |
1994 |
| details |
Late Tremadocian |
Arenigian |
China(Kiangsu) |
Geng,L.-Y. et al. Chitinozoan biostratigraphy in China. |
2000 |