| original |
Wenlockian |
Late Ludlovian |
England(Shropshire) |
Hinde,G.J. On Annelid jaws from the Wenlock and Ludlow formations of the west of England. |
1880 |
| details |
Middle Ordovician |
|
Europe |
Taugourdeau,P. Scolecodont dispersa |
1978 |
| 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 |
Early Sheinwoodian |
|
Sweden |
Bergman,C.F. Silurian Paulinitid Polychaetes from Gotland |
1989 |