Politusella |
Politusella sp
|
USSR(Urals) |
Callovian |
|
Politusella |
Politusella spinigera
|
USSR(Urals) |
Bajocian |
Bathonian |
Pollenites |
Pollenites convexus
|
USSR(Urals) |
Early Albian |
Middle Albian |
Pollinaria |
Pollinaria aktschagilensis
|
USSR(Urals) |
Bathonian |
|
Protosacculina |
Protosacculina glabrescens
|
USSR(Urals) |
Keuper |
|
Pterina |
Pterina crispa
|
USSR(Urals) |
Keuper |
|
Pterina |
Pterina obliqua
|
USSR(Urals) |
Hettangian |
Toarcian |
Pterina |
Pterina obliquiformis
|
USSR(Urals) |
Keuper |
|
Pyramidella |
Pyramidella exilis
|
USSR(Urals) |
Early Albian |
Middle Albian |
Pyramidella |
Pyramidella trisecta
|
USSR(Urals) |
Callovian |
Middle Albian |
Quadraeculina |
Quadraeculina prolongata
|
USSR(Urals) |
Valanginian |
Middle Albian |
Retectina |
Retectina cristata
|
USSR(Urals) |
Late Bajocian |
|
Retectina |
Retectina glabra
|
USSR(Urals) |
Keuper |
Early Bathonian |
Retectina |
Retectina glabrescens
|
USSR(Urals) |
Bathonian |
|
Retectina |
Retectina minor
|
USSR(Urals) |
Keuper |
Toarcian |
Retectina |
Retectina punctata
|
USSR(Urals) |
Keuper |
Toarcian |
Retectina |
Retectina rotundiformis
|
USSR(Urals) |
Bathonian |
|