Fractoricoronula |
Fractoricoronula
|
Nd |
Nd |
|
Fractoricoronula |
Fractoricoronula cubitalia
|
Nd |
Late Ordovician |
|
Fractoricoronula |
Fractoricoronula trirhetica
|
Nd |
Harnagian |
Longvillian |
Frankea |
Frankea
|
Nd |
Nd |
|
Frankea |
Frankea breviuscula
|
Nd |
Late Llanvirnian |
|
Frankea |
Frankea hamata
|
Nd |
Late Llanvirnian |
|
Frankea |
Frankea hamulata
|
Nd |
Late Llanvirnian |
|
Frankea |
Frankea longiuscula
|
Nd |
Late Llanvirnian |
|
Frankea |
Frankea sartbernardensis
|
Nd |
Arenigian |
|
Frasnacritetrus |
Frasnacritetrus
|
Nd |
Nd |
|
Frasnacritetrus |
Frasnacritetrus conatus
|
India(Himachal Pradesh) |
Middle Miocene |
Late Miocene |
Frasnacritetrus |
Frasnacritetrus josetteae
|
France(Pas-de-Calais) |
Frasnian |
|
Frasnacritetrus |
Frasnacritetrus taugourdeauii
|
India(Himachal Pradesh) |
Early Miocene |
|
Fromea |
Fromea
|
Nd |
Nd |
|
Fromea |
Fromea acambra
|
Nd |
Late Cretaceous |
|
Fromea |
Fromea amphora
|
Nd |
Albian |
Cenomanian |
Fromea |
Fromea apiculata
|
Nd |
Santonian |
Campanian |