Prismatocystis |
Prismatocystis
|
Nd |
Nd |
|
Prismatocystis |
Prismatocystis cylindrica
|
Nd |
Albian |
Cenomanian |
Prismatocystis |
Prismatocystis ewingii
|
Nd |
Albian |
Cenomanian |
Protoarchaeosacculina |
Protoarchaeosacculina
|
Nd |
Nd |
|
Protoarchaeosacculina |
Protoarchaeosacculina atava
|
Nd |
Riphean |
|
Protobolella |
Protobolella
|
Nd |
Nd |
|
Protobolella |
Protobolella jonesii
|
Nd |
Late Precambrian |
|
Protoleiosphaeridium |
Protoleiosphaeridium
|
Nd |
Nd |
|
Protoleiosphaeridium |
Protoleiosphaeridium alpha
|
Nd |
Nd |
|
Protoleiosphaeridium |
Protoleiosphaeridium angulatum
|
Nd |
Nd |
|
Protoleiosphaeridium |
Protoleiosphaeridium araneosum
|
Nd |
Late Proterozoic |
|
Protoleiosphaeridium |
Protoleiosphaeridium beta
|
Nd |
Nd |
|
Protoleiosphaeridium |
Protoleiosphaeridium britoi
|
Brazil(Amazonas) |
Arenigian |
Llanvirnian |
Protoleiosphaeridium |
Protoleiosphaeridium bullatum
|
USSR(Russian Platform) |
Late Proterozoic |
|
Protoleiosphaeridium |
Protoleiosphaeridium cambriense
|
Nd |
Middle Cambrian |
|
Protoleiosphaeridium |
Protoleiosphaeridium capitellum
|
Nd |
Sinian |
|
Protoleiosphaeridium |
Protoleiosphaeridium cellulare
|
Nd |
Nd |
|