Staurocephalites |
Staurocephalites longirostris
|
North America |
Middle Devonian |
|
Staurocephalites |
Staurocephalites longus
|
North America |
Middle Devonian |
|
Staurocephalites |
Staurocephalites mccallae
|
North America |
Middle Ordovician |
|
Staurocephalites |
Staurocephalites mierowae
|
North America |
Middle Ordovician |
|
Staurocephalites |
Staurocephalites nettingi
|
North America |
Middle Ordovician |
|
Staurocephalites |
Staurocephalites paquettensis
|
North America |
Middle Ordovician |
|
Staurocephalites |
Staurocephalites pyramis
|
North America |
Early Gothlandian |
|
Staurocephalites |
Staurocephalites triplus
|
North America |
Middle Ordovician |
|
Stauronereisites |
Stauronereisites abditivus
|
North America |
Late Devonian |
|
Stauronereisites |
Stauronereisites adversarius
|
North America |
Late Devonian |
|
Stauronereisites |
Stauronereisites aequalis
|
North America |
Late Devonian |
|
Stauronereisites |
Stauronereisites auriculatus
|
North America |
Late Devonian |
|
Thalenessites |
Thalenessites lobatus
|
North America |
Middle Ordovician |
|
Trianguligenys |
Trianguligenys lacinata
|
North America |
Late Devonian |
|
Ungulites |
Ungulites aculeatus
|
North America |
Middle Ordovician |
|
Ungulites |
Ungulites acutidactylus
|
North America |
Late Devonian |
|
Ungulites |
Ungulites agglomeratus
|
North America |
Late Devonian |
|