| details |
Ordovician |
|
Ohio |
Corradini,D. et al. Ultrastructure of some fossil and recent polychaete jaws, (scolecodonts). |
1974 |
| 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 |
Late Tremadocian |
Early Arenigian |
Canada(Newfoundland) |
Underhay,N.K. et al. Lower Ordovician scolecodonts from the Cow Head Group, Western Newfoundland. |
1995 |
| details |
Late Richmondian |
|
Oklahoma |
Eriksson,M. et al. Microfossils from the upper Sylvan Shale (Late Ordovician), Oklahoma, USA. (In: Ordovician from the Andes. G.L.Albanesi,M.S.Beresi,S.H.Peralta,editors) |
2003 |
| details |
Richmondian |
|
Kentucky |
Eriksson,M. Late Ordovician polychaetaspid polychaete annelids from the type Cincinnatian region, USA.(In: Ordovician from the Andes. G.L.Albanesi,M.S.Beresi,S.H.Peralta,editors) |
2003 |
| details |
Richmondian |
|
Indiana |
Eriksson,M. Late Ordovician polychaetaspid polychaete annelids from the type Cincinnatian region, USA.(In: Ordovician from the Andes. G.L.Albanesi,M.S.Beresi,S.H.Peralta,editors) |
2003 |
| details |
Richmondian |
|
Ohio |
Eriksson,M. Late Ordovician polychaetaspid polychaete annelids from the type Cincinnatian region, USA.(In: Ordovician from the Andes. G.L.Albanesi,M.S.Beresi,S.H.Peralta,editors) |
2003 |