Protolophosphaeridium |
Protolophosphaeridium aphtosum
|
Nd |
Nd |
|
Protolophosphaeridium |
Protolophosphaeridium faetonum
|
Nd |
Nd |
|
Protomassulina |
Protomassulina
|
Nd |
Nd |
|
Protomassulina |
Protomassulina simplex
|
Nd |
Nd |
|
Protomycterosphaeridium |
Protomycterosphaeridium
|
Nd |
Nd |
|
Protomycterosphaeridium |
Protomycterosphaeridium marmoratum
|
Nd |
Nd |
|
Protoocridosphaeridium |
Protoocridosphaeridium
|
Nd |
Nd |
|
Protoocridosphaeridium |
Protoocridosphaeridium elandii
|
Nd |
Middle Cambrian |
|
Protosalvinia |
Protosalvinia
|
Nd |
Nd |
|
Protosalvinia |
Protosalvinia huronensis
|
Nd |
Late Devonian |
|
Protosphaeridium |
Protosphaeridium
|
Nd |
Nd |
|
Protosphaeridium |
Protosphaeridium ace
|
Nd |
Late Precambrian |
|
Protosphaeridium |
Protosphaeridium areolatum
|
Nd |
Nd |
|
Protosphaeridium |
Protosphaeridium asaphum
|
Nd |
Early Cambrian |
|
Protosphaeridium |
Protosphaeridium britoi
|
Brazil(Amazonas) |
Arenigian |
Llanvirnian |
Protosphaeridium |
Protosphaeridium charnium
|
Nd |
Nd |
|
Protosphaeridium |
Protosphaeridium corrugatum
|
Nd |
Nd |
|