Auritulina |
Auritulina trilateroides
|
USSR(Urals) |
Hettangian |
Toarcian |
Auritulina |
Auritulina vulgaris
|
USSR(Urals) |
Hettangian |
Toarcian |
Bialina |
Bialina sacculifera
|
USSR(Urals) |
Valanginian |
|
Brachyphyllum |
Brachyphyllum vulgare
|
USSR(Urals) |
Callovian |
|
Bracteolina |
Bracteolina colliculoides
|
USSR(Urals) |
Keuper |
|
Bracteolina |
Bracteolina gigantea
|
USSR(Urals) |
Hettangian |
Toarcian |
Bracteolina |
Bracteolina retituberculata
|
USSR(Urals) |
Bathonian |
|
Bracteolina |
Bracteolina trichoris
|
USSR(Urals) |
Hettangian |
Toarcian |
Bracteolina |
Bracteolina ventoselliformis
|
USSR(Urals) |
Bathonian |
|
Bucculina |
Bucculina glabrescens
|
USSR(Urals) |
Late Bajocian |
Early Bathonian |
Bucculina |
Bucculina sp
|
USSR(Urals) |
Callovian |
Valanginian |
Bucculina |
Bucculina triangularis
|
USSR(Urals) |
Early Albian |
Middle Albian |
Bucculina |
Bucculina triquetra
|
USSR(Urals) |
Bajocian |
Callovian |
Bucculina |
Bucculina triquetra
|
USSR(Urals) |
Late Bajocian |
|
Bulbella |
Bulbella brevispina
|
USSR(Urals) |
Early Triassic |
|
Bullulina |
Bullulina aggerelloides
|
USSR(Urals) |
Late Bajocian |
Middle Albian |
Bullulina |
Bullulina media
|
USSR(Urals) |
Bajocian |
Bathonian |