Achomosphaera |
Achomosphaera ramulifera
|
Gabon |
Campanian |
Maestrichtian |
Aldorfia |
Aldorfia aldorfensis
|
Germany |
Early Bathonian |
|
Alisocysta |
Alisocysta circumtabulata
|
California |
Danian |
|
Ambonosphaera |
Ambonosphaera calloviana
|
Greenland |
Callovian |
|
Amphorosphaeridium |
Amphorosphaeridium fenestratum
|
South Africa |
Campanian |
Maestrichtian |
Amphorosphaeridium |
Amphorosphaeridium fenestratum
|
South Africa |
Campanian |
Maestrichtian |
Amphorosphaeridium |
Amphorosphaeridium fenestratum
|
South Africa |
Campanian |
Maestrichtian |
Amphorosphaeridium |
Amphorosphaeridium fenestratum
|
South Africa |
Campanian |
Maestrichtian |
Andreedinium |
Andreedinium arcticum
|
Spitsbergen |
Toarcian |
|
Angustidinium |
Angustidinium acribes
|
France |
Early Albian |
|
Angustidinium |
Angustidinium vozzhennikovae
|
USSR(Vologda) |
Late Volgian |
|
Aprobolocysta |
Aprobolocysta eilema
|
England(Isle of Wight) |
Hauterivian |
|
Arachnodinium |
Arachnodinium antarcticum
|
Antarctica(Offshore) |
Early Tertiary |
|
Ataxiodinium |
Ataxiodinium choane
|
England(Shropshire) |
Holocene |
|
Avellodinium |
Avellodinium falsificum
|
England(Isle of Wight) |
Neocomian |
|
Boreocysta |
Boreocysta butticula
|
Alaska |
Early Hauterivian |
|
Bradleyella |
Bradleyella adela
|
England(Oxfordshire) |
Late Bajocian |
|