Arkonia |
Arkonia tenuata
|
E.Germany |
Late Llanvirnian |
|
Arkonia |
Arkonia triangulata
|
Nd |
Late Arenigian |
Early Llanvirnian |
Arkonia |
Arkonia virgata
|
E.Germany |
Late Llanvirnian |
|
Arkonites |
Arkonites
|
Nd |
Nd |
|
Arkonites |
Arkonites bilixus
|
Nd |
Givetian |
|
Aryballomorpha |
Aryballomorpha
|
Nd |
Nd |
|
Aryballomorpha |
Aryballomorpha grootaertii
|
Nd |
Late Tremadocian |
|
Ascostomocystis |
Ascostomocystis
|
Nd |
Nd |
|
Ascostomocystis |
Ascostomocystis gigantea
|
Nd |
Early Cenomanian |
|
Ascostomocystis |
Ascostomocystis granosa
|
Nd |
Early Miocene |
Middle Miocene |
Ascostomocystis |
Ascostomocystis granulata
|
France(Paris Basin) |
Middle Eocene |
Early Oligocene |
Ascostomocystis |
Ascostomocystis hydria
|
Nd |
Early Eocene |
|
Ascostomocystis |
Ascostomocystis laevigata
|
Nd |
Late Eocene |
|
Ascostomocystis |
Ascostomocystis maxima
|
Nd |
Late Albian |
|
Ascostomocystis |
Ascostomocystis potane
|
Nd |
Oligocene |
|
Asketopalla |
Asketopalla
|
Nd |
Nd |
|
Asketopalla |
Asketopalla formosula
|
Nd |
Llandeilian |
|