| original |
Middle Ordovician |
|
Poland |
Kielan-Jaworowska,Z. Polychaete jaw apparatuses from the Ordovician and Silurian of Poland and a comparison with modern forms. |
1966 |
| details |
Middle Ordovician |
|
Europe |
Taugourdeau,P. Scolecodont dispersa |
1978 |
| details |
Late Tremadocian |
Early Arenigian |
Canada(Newfoundland) |
Underhay,N.K. et al. Lower Ordovician scolecodonts from the Cow Head Group, Western Newfoundland. |
1995 |
| details |
Middle Ordovician |
Late Ordovician |
Atlantic Ocean(Northwest) |
Hinte,J.E. Van et al. Palaeozoic microfossils from Orphan Knoll, northwest Atlantic Ocean. |
1995 |
| details |
Llandeilian |
Rakvere |
Estonia |
Hints,O. Late Viruan (Caradoc) polychaete jaws from North Estonia and the St. Petersburg region. |
1998 |
| details |
Llandeilian |
Rakvere |
Russia(St.Petersburg) |
Hints,O. Late Viruan (Caradoc) polychaete jaws from North Estonia and the St. Petersburg region. |
1998 |