Skalenoprion |
Skalenoprion bugensis
|
Europe |
Late Gothlandian |
|
Staurocephalites |
Staurocephalites absimilis
|
Africa(Sahara) |
Middle Ordovician |
|
Staurocephalites |
Staurocephalites absis
|
North America |
Middle Ordovician |
|
Staurocephalites |
Staurocephalites acutidentatus
|
North America |
Middle Ordovician |
|
Staurocephalites |
Staurocephalites admirabilis
|
North America |
Middle Ordovician |
|
Staurocephalites |
Staurocephalites aduncus
|
North America |
Middle Ordovician |
|
Staurocephalites |
Staurocephalites aequilateralis
|
Africa(Sahara) |
Middle Devonian |
Late Devonian |
Staurocephalites |
Staurocephalites aequilateralis
|
North America |
Middle Devonian |
Late Devonian |
Staurocephalites |
Staurocephalites agriodos
|
North America |
Late Devonian |
|
Staurocephalites |
Staurocephalites alterostris
|
North America |
Early Ordovician |
|
Staurocephalites |
Staurocephalites alterostris
|
North America |
Middle Gothlandian |
|
Staurocephalites |
Staurocephalites alterostris
|
North America |
Middle Devonian |
Carboniferous |
Staurocephalites |
Staurocephalites antiquus
|
North America |
Middle Ordovician |
|
Staurocephalites |
Staurocephalites appositus
|
Africa(Sahara) |
Middle Ordovician |
|
Staurocephalites |
Staurocephalites arcuatus
|
Africa(Sahara) |
Middle Devonian |
Late Devonian |
Staurocephalites |
Staurocephalites arcus
|
Africa(Sahara) |
Middle Ordovician |
|
Staurocephalites |
Staurocephalites articulatus
|
North America |
Late Devonian |
|