Protosphaeridium |
Protosphaeridium gyratum
|
USSR(Ukrainian SSR) |
Precambriam |
|
Protosphaeridium |
Protosphaeridium laccatum
|
USSR(Karelian ASSR) |
Middle Precambrian |
|
Protosphaeridium |
Protosphaeridium laccatum
|
USSR(Ukrainian SSR) |
Middle Precambrian |
|
Protosphaeridium |
Protosphaeridium laccatum
|
USSR(Ukrainian SSR) |
Precambriam |
|
Protosphaeridium |
Protosphaeridium laccatum
|
USSR(Siberia) |
Middle Precambrian |
|
Protosphaeridium |
Protosphaeridium laccatum
|
USSR(Siberia) |
Riphean |
|
Protosphaeridium |
Protosphaeridium paleaceum
|
USSR(Ukrainian SSR) |
Middle Precambrian |
|
Protosphaeridium |
Protosphaeridium paleaceum
|
USSR(Siberia) |
Riphean |
|
Protosphaeridium |
Protosphaeridium papyraceum
|
USSR(Siberia) |
Riphean |
|
Protosphaeridium |
Protosphaeridium parvulum
|
USSR(Karelian ASSR) |
Middle Precambrian |
|
Protosphaeridium |
Protosphaeridium parvulum
|
USSR(Siberia) |
Riphean |
|
Protosphaeridium |
Protosphaeridium patelliforme
|
USSR(Ukrainian SSR) |
Middle Precambrian |
|
Protosphaeridium |
Protosphaeridium patelliforme
|
USSR(Ukrainian SSR) |
Precambriam |
|
Protosphaeridium |
Protosphaeridium patelliforme
|
USSR(Siberia) |
Middle Precambrian |
|
Protosphaeridium |
Protosphaeridium patelliforme
|
USSR(Siberia) |
Riphean |
|
Protosphaeridium |
Protosphaeridium planum
|
USSR(Siberia) |
Middle Precambrian |
|
Protosphaeridium |
Protosphaeridium pusillum
|
USSR(Siberia) |
Riphean |
|