| details |
Middle Ordovician |
Devonian |
Worldwide |
Taugourdeau,P. Importance of evolution of the dispersed scolecodonts, (Annelids) in the stocking of seas during Paleozoic times. |
1983 |
| details |
Nd |
|
Nd |
Szaniawski,H. Scolecodonts. (Principles and Applications. Applications. J.Jansonius and D.C.McGregor, editors.) |
1996 |
| original |
Mohawkian |
|
Minnesota |
Stauffer,C.R. Middle Ordovician polychaeta from Minnesota. |
1933 |
| original |
Mohawkian |
|
Iowa |
Stauffer,C.R. Middle Ordovician polychaeta from Minnesota. |
1933 |
| details |
Mohawkian |
|
Minnesota |
Kozur,H. A study on the classification of fossil Phyllodocida and Eunicida (polychaeta). |
1970 |