| details |
Wenlockian |
|
England |
Eisenack,A. Contributions to Annelid research |
1975 |
| details |
Middle Ordovician |
|
Europe |
Taugourdeau,P. Scolecodont dispersa |
1978 |
| details |
Nd |
|
Nd |
Edgar,D.R. Polychaetes of the Lower and Middle Paleozoic. A multi-element analysis and a phylogenetic outline. |
1984 |
| details |
Llandeilian |
Early Ashgillian |
Poland |
Szaniawski,H. Jaw apparatuses of the Ordovician and Silurian polychaetes, from Nielnik borehole. |
1970 |
| details |
Caradocian |
|
Poland |
Kielan-Jaworowska,Z. New Ordovician genera of polychaete jaw apparatuses. |
1962 |
| details |
Middle Ordovician |
|
Poland |
Szaniawski,H. Scolecodonts and conodonts of Poland and their problems of systematics |
1975 |
| details |
Middle Ordovician |
|
Poland |
Kielan-Jaworowska,Z. Polychaete jaw apparatuses from the Ordovician and Silurian of Poland and a comparison with modern forms. |
1966 |
| details |
Silurian |
|
Sweden |
Bergman,C.F. Polychaete jaws. (In: Lower Wenlock faunal and flora dynamics-Vattenfallet section, Gotland. V.Jaanusson, S.Laufeld and R.Skoglund, editors) |
1979 |
| details |
Llandoverian |
|
USSR(Siberia) |
Myannil,R.M. et al. Silurian polychaetes from northern Siberia |
1985 |