Protosphaeridium |
Protosphaeridium rigidulum
|
USSR(Siberia) |
Riphean |
|
Protosphaeridium |
Protosphaeridium scabridum
|
USSR(Siberia) |
Riphean |
|
Protosphaeridium |
Protosphaeridium sp
|
USSR(Siberia) |
Riphean |
|
Protosphaeridium |
Protosphaeridium torulosum
|
USSR(Siberia) |
Riphean |
|
Protosphaeridium |
Protosphaeridium tuberculiferum
|
USSR(Siberia) |
Riphean |
|
Protosphaeridium |
Protosphaeridium vermium
|
USSR(Siberia) |
Riphean |
|
Pterospermopsimorpha |
Pterospermopsimorpha insolita
|
USSR(Siberia) |
Riphean |
|
Pterospermopsimorpha |
Pterospermopsimorpha pileiformis
|
USSR(Siberia) |
Riphean |
|
Pterospermopsimorpha |
Pterospermopsimorpha sp
|
USSR(Siberia) |
Riphean |
|
Stictosphaeridium |
Stictosphaeridium implexum
|
USSR(Siberia) |
Riphean |
|
Stictosphaeridium |
Stictosphaeridium pectinale
|
USSR(Siberia) |
Riphean |
|
Stictosphaeridium |
Stictosphaeridium sibiricum
|
USSR(Siberia) |
Riphean |
|
Stictosphaeridium |
Stictosphaeridium sinapticuliferum
|
USSR(Siberia) |
Riphean |
|
Stictosphaeridium |
Stictosphaeridium sp
|
USSR(Siberia) |
Riphean |
|
Stictosphaeridium |
Stictosphaeridium tortulosum
|
USSR(Siberia) |
Riphean |
|
Symplassosphaeridium |
Symplassosphaeridium sp
|
USSR(Siberia) |
Riphean |
|
Synsphaeridium |
Synsphaeridium conglutinatum
|
USSR(Siberia) |
Riphean |
|