Orygmatosphaeridium |
Orygmatosphaeridium
|
USSR |
Riphean |
|
Polyedrosphaeridium |
Polyedrosphaeridium
|
USSR |
Riphean |
|
Protosphaeridium |
Protosphaeridium
|
USSR |
Riphean |
|
Protosphaeridium |
Protosphaeridium densum
|
USSR |
Riphean |
|
Protosphaeridium |
Protosphaeridium gibberosum
|
USSR |
Riphean |
|
Protosphaeridium |
Protosphaeridium laccatum
|
USSR |
Riphean |
|
Protosphaeridium |
Protosphaeridium patelliforme
|
USSR |
Riphean |
|
Protosphaeridium |
Protosphaeridium torulosum
|
USSR |
Riphean |
|
Protosphaeridium |
Protosphaeridium tuberculiferum
|
USSR |
Riphean |
|
Pterospermopsimorpha |
Pterospermopsimorpha
|
USSR |
Riphean |
|
Pterospermopsimorpha |
Pterospermopsimorpha
|
USSR |
Riphean |
|
Pterospermopsimorpha |
Pterospermopsimorpha pileiformis
|
USSR |
Riphean |
|
Pulvinomorpha |
Pulvinomorpha
|
USSR |
Riphean |
|
Sphaerohystrichomorphida |
Sphaerohystrichomorphida
|
USSR |
Riphean |
|
Stictosphaeridium |
Stictosphaeridium
|
USSR |
Riphean |
|
Stictosphaeridium |
Stictosphaeridium implexum
|
USSR |
Riphean |
|
Stictosphaeridium |
Stictosphaeridium sinapticuliferum
|
USSR |
Riphean |
|