Polyedrosphaeridium |
Polyedrosphaeridium hidusense
|
USSR(Siberia) |
Early Cambrian |
|
Polyedryxium |
Polyedryxium deflandrei
|
Canada |
Devonian |
|
Polystephanephorus |
Polystephanephorus calathus
|
England |
Late Jurassic |
|
Polystephanosphaera |
Polystephanosphaera valensii
|
England |
Oxfordian |
|
Priscogalea |
Priscogalea barbara
|
Africa |
Tremadocian |
|
Priscotheca |
Priscotheca raia
|
Africa |
Tremadocian |
|
Protoarchaeosacculina |
Protoarchaeosacculina atava
|
USSR |
Precambriam |
|
Protoleiosphaeridium |
Protoleiosphaeridium conglutinatum
|
USSR |
Early Proterozoic |
Early Paleozoic |
Protoocridosphaeridium |
Protoocridosphaeridium elandii
|
Sweden |
Middle Cambrian |
|
Prototrematosphaeridium |
Prototrematosphaeridium holtedahlii
|
Norway |
Early Cambrian |
|
Pseudoceratium |
Pseudoceratium pelliferum
|
Germany |
Hauterivian |
|
Pseudodeflandrea |
Pseudodeflandrea gigantea
|
Germany |
Middle Miocene |
|
Pterocystidiopsis |
Pterocystidiopsis stephaniana
|
France |
Cretaceous |
|
Pterodinium |
Pterodinium aliferum
|
Germany |
Aptian |
|
Pterospermopsimorpha |
Pterospermopsimorpha kelar
|
Sweden |
Nd |
|
Pterospermopsis |
Pterospermopsis danica
|
Germany |
Danian |
|
Pulvinosphaeridium |
Pulvinosphaeridium pulvinellum
|
Baltic |
Silurian |
|