Protosphaeridium |
Protosphaeridium rigidulum
|
USSR(Karelian ASSR) |
Middle Precambrian |
|
Protosphaeridium |
Protosphaeridium rigidulum
|
USSR(Ukrainian SSR) |
Middle Precambrian |
|
Protosphaeridium |
Protosphaeridium rigidulum
|
USSR(Ukrainian SSR) |
Precambriam |
|
Protosphaeridium |
Protosphaeridium rigidulum
|
USSR(Siberia) |
Riphean |
|
Protosphaeridium |
Protosphaeridium rugosum
|
USSR(Siberia) |
Riphean |
|
Protosphaeridium |
Protosphaeridium scabridum
|
USSR(Karelian ASSR) |
Middle Precambrian |
|
Protosphaeridium |
Protosphaeridium scabridum
|
USSR(Ukrainian SSR) |
Precambriam |
|
Protosphaeridium |
Protosphaeridium scabridum
|
USSR(Siberia) |
Middle Precambrian |
|
Protosphaeridium |
Protosphaeridium scabridum
|
USSR(Siberia) |
Riphean |
|
Protosphaeridium |
Protosphaeridium sp
|
USSR(Karelian ASSR) |
Middle Precambrian |
|
Protosphaeridium |
Protosphaeridium sp
|
USSR(Ukrainian SSR) |
Middle Precambrian |
|
Protosphaeridium |
Protosphaeridium sp
|
USSR(Ukrainian SSR) |
Precambriam |
|
Protosphaeridium |
Protosphaeridium sp
|
USSR(Siberia) |
Riphean |
|
Protosphaeridium |
Protosphaeridium torulosum
|
USSR(Siberia) |
Middle Precambrian |
|
Protosphaeridium |
Protosphaeridium torulosum
|
USSR(Siberia) |
Riphean |
|
Protosphaeridium |
Protosphaeridium tuberculiferum
|
USSR(Karelian ASSR) |
Middle Precambrian |
|
Protosphaeridium |
Protosphaeridium tuberculiferum
|
USSR(Ukrainian SSR) |
Middle Precambrian |
|