Protosphaeridium |
Protosphaeridium densum
|
USSR(Chelyabinskaya) |
Middle Riphean |
|
Protosphaeridium |
Protosphaeridium flexuosum
|
USSR(Chelyabinskaya) |
Riphean |
Kudashian |
Protosphaeridium |
Protosphaeridium sp
|
USSR(Chelyabinskaya) |
Riphean |
Vendian |
Protosphaeridium |
Protosphaeridium vermium
|
USSR(Chelyabinskaya) |
Middle Riphean |
Late Riphean |
Pterospermopsimorpha |
Pterospermopsimorpha sp
|
USSR(Chelyabinskaya) |
Middle Riphean |
Vendian |
Pterospermopsis |
Pterospermopsis dubius
|
USSR(Chelyabinskaya) |
Late Riphean |
|
Pterospermopsis |
Pterospermopsis simicus
|
USSR(Chelyabinskaya) |
Late Riphean |
|
Satka |
Satka elongata
|
USSR(Chelyabinskaya) |
Middle Riphean |
Late Riphean |
Satka |
Satka favosa
|
USSR(Chelyabinskaya) |
Early Riphean |
Middle Riphean |
Satka |
Satka granulosa
|
USSR(Chelyabinskaya) |
Vendian |
|
Siphonophycus |
Siphonophycus costatus
|
USSR(Chelyabinskaya) |
Late Riphean |
|
Siphonophycus |
Siphonophycus kestron
|
USSR(Chelyabinskaya) |
Late Riphean |
|
Siphonophycus |
Siphonophycus sp
|
USSR(Chelyabinskaya) |
Late Riphean |
|
Stictosphaeridium |
Stictosphaeridium implexum
|
USSR(Chelyabinskaya) |
Early Riphean |
|
Stictosphaeridium |
Stictosphaeridium sp
|
USSR(Chelyabinskaya) |
Riphean |
Kudashian |
Symplassosphaeridium |
Symplassosphaeridium undosum
|
USSR(Chelyabinskaya) |
Early Riphean |
|
Synsphaeridium |
Synsphaeridium sp
|
USSR(Chelyabinskaya) |
Riphean |
Early Vendian |