| original |
Ordovician |
Silurian |
Poland |
Kielan-Jaworowska,Z. Polychaete jaw apparatuses from the Ordovician and Silurian of Poland and a comparison with modern forms. |
1966 |
| details |
Early Ordovician |
|
Europe |
Taugourdeau,P. Scolecodont dispersa |
1978 |
| details |
Llandoverian |
Wenlockian |
USSR(Siberia) |
Myannil,R.M. et al. Silurian polychaetes from northern Siberia |
1985 |
| details |
Ordovician |
Silurian |
Poland |
Eriksson,M. Lower Silurian polychaetaspid polychaetes from Gotland, Sweden. |
1997 |
| details |
Late Llandoverian |
Early Wenlockian |
Sweden(Gotland) |
Eriksson,M. Lower Silurian polychaetaspid polychaetes from Gotland, Sweden. |
1997 |
| 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 |