Albertia |
Albertia recticornis
|
Nd |
Turonian |
|
Amphidiadema |
Amphidiadema denticulata
|
Nd |
Senonian |
|
Amphidinium |
Amphidinium mitratum
|
USSR(Tomskaya Oblast) |
Turonian |
Middle Senonian |
Amphidinium |
Amphidinium operculatum
|
Nd |
Recent |
|
Amphidinium |
Amphidinium sibericum
|
Nd |
Nd |
|
Amphorosphaeridium |
Amphorosphaeridium bipolare
|
Nd |
Nd |
|
Amphorosphaeridium |
Amphorosphaeridium fenestratum
|
Nd |
Campanian |
Maastrichtian |
Amphorosphaeridium |
Amphorosphaeridium fenestratum
sp. nov. |
Nd |
Campanian |
Maastrichtian |
Amphorosphaeridium |
Amphorosphaeridium latitubulum
|
Nd |
Campanian |
Maastrichtian |
Amphorosphaeridium |
Amphorosphaeridium multibrevum
|
Nd |
Campanian |
Maastrichtian |
Amphorula |
Amphorula metaelliptica
|
Nd |
Tithonian |
|
Anhystrichosphaeridium |
Anhystrichosphaeridium
|
Nd |
Nd |
|
Anthosphaeridium |
Anthosphaeridium convolvuloides
|
Nd |
Santonian |
Early Campanian |
Aptea |
Aptea polymorpha
|
Nd |
Early Cretaceous |
|
Aptea |
Aptea rugulosa
|
Nd |
Santonian |
|
Apteodinium |
Apteodinium ciliatum
|
Nd |
Nd |
|
Apteodinium |
Apteodinium conjunctum
|
Nd |
Aptian |
|