Arctacellularia |
Arctacellularia ellipsoidea
|
USSR(Ukrainian SSR) |
Middle Riphean |
Late Riphean |
Leiosphaeridia |
Leiosphaeridia aperta
|
USSR(Ukrainian SSR) |
Middle Riphean |
Late Riphean |
Leiosphaeridia |
Leiosphaeridia effusa
|
USSR(Ukrainian SSR) |
Middle Riphean |
Late Riphean |
Leiosphaeridia |
Leiosphaeridia jacutica
|
USSR(Ukrainian SSR) |
Middle Riphean |
Late Riphean |
Leiosphaeridia |
Leiosphaeridia parva
|
USSR(Ukrainian SSR) |
Middle Riphean |
Late Riphean |
Leiosphaeridia |
Leiosphaeridia vesljanica
|
USSR(Ukrainian SSR) |
Middle Riphean |
Late Riphean |
Nucellosphaeridium |
Nucellosphaeridium deminatum
|
USSR(Ukrainian SSR) |
Middle Riphean |
Late Riphean |
Stictosphaeridium |
Stictosphaeridium sinapticuliferum
|
USSR(Ukrainian SSR) |
Middle Riphean |
Late Riphean |
Symplassosphaeridium |
Symplassosphaeridium undosum
|
USSR(Ukrainian SSR) |
Middle Riphean |
Late Riphean |
Synsphaeridium |
Synsphaeridium sp
|
USSR(Ukrainian SSR) |
Middle Riphean |
Late Riphean |
Trachysphaeridium |
Trachysphaeridium sp
|
USSR(Ukrainian SSR) |
Middle Riphean |
Late Riphean |