Archaeoperisaccus |
Archaeoperisaccus balticus
|
USSR(Estonian SSR) |
Early Cambrian |
|
Archaeopertusina |
Archaeopertusina atava
|
USSR |
Precambriam |
|
Aremoricanium |
Aremoricanium rigaudiae
|
France |
Ordovician |
|
Areoligera |
Areoligera senonensis
|
Belgium |
Senonian |
|
Ascodinium |
Ascodinium acrophorum
|
Australia(W.Australia) |
Late Albian |
Cenomanian |
Asperatopsophosphaera |
Asperatopsophosphaera sp
|
Nd |
Nd |
|
Bacisphaeridium |
Bacisphaeridium bacifer
|
Baltic |
Ordovician |
|
Baltisphaeridium |
Baltisphaeridium longispinosum
|
Baltic |
Silurian |
|
Bavlinella |
Bavlinella sp
|
Nd |
Nd |
|
Belodinium |
Belodinium dysculum
|
Australia(W.Australia) |
Tithonian |
|
Bicarinellum |
Bicarinellum castaninium
|
France |
Eocene |
|
Biechelerella |
Biechelerella jurassica
|
France |
Jurassic |
|
Blepharocysta |
Blepharocysta sp
|
Nd |
Nd |
|
Brochopsophosphaera |
Brochopsophosphaera minima
|
USSR |
Nd |
|
Broomea |
Broomea ramosa
|
Australia(W.Australia) |
Late Jurassic |
|
Buedingiisphaeridium |
Buedingiisphaeridium permicum
|
Germany |
Late Permian |
|
Bulbodinium |
Bulbodinium seitzii
|
Baltic |
Senonian |
|