Protosphaeridium |
Protosphaeridium debilum
|
USSR(Siberia) |
Middle Proterozoic |
|
Protosphaeridium |
Protosphaeridium flexuosum
|
USSR(Siberia) |
Middle Proterozoic |
|
Protosphaeridium |
Protosphaeridium infriatum
|
USSR(Siberia) |
Middle Proterozoic |
|
Protosphaeridium |
Protosphaeridium sigillarum
|
USSR(Siberia) |
Middle Proterozoic |
|
Protosphaeridium |
Protosphaeridium sorediforme
|
USSR(Siberia) |
Middle Proterozoic |
|
Protosphaeridium |
Protosphaeridium subcrassatum
|
USSR(Siberia) |
Late Proterozoic |
|
Trachyminuscula |
Trachyminuscula
|
USSR(Siberia) |
Late Proterozoic |
|
Trachysphaeridium |
Trachysphaeridium complanatum
|
USSR(Siberia) |
Middle Proterozoic |
|
Trachysphaeridium |
Trachysphaeridium patellare
|
USSR(Siberia) |
Late Proterozoic |
|
Trachysphaeridium |
Trachysphaeridium patellare
|
USSR(Siberia) |
Precambriam |
|
Trematosphaeridium |
Trematosphaeridium
|
USSR(Siberia) |
Late Proterozoic |
|
Zonosphaeridium |
Zonosphaeridium limpatum
|
USSR(Siberia) |
Precambriam |
|