Protosphaeridium |
Protosphaeridium
|
USSR(Russian Platform) |
Late Proterozoic |
Cambrian |
Lophosphaeridium |
Lophosphaeridium
|
USSR(Russian Platform) |
Late Proterozoic |
Cambrian |
Trachysphaeridium |
Trachysphaeridium
|
USSR(Russian Platform) |
Late Proterozoic |
Cambrian |
Orygmatosphaeridium |
Orygmatosphaeridium
|
USSR(Russian Platform) |
Late Proterozoic |
Cambrian |
Zonosphaeridium |
Zonosphaeridium
|
USSR(Russian Platform) |
Late Proterozoic |
Cambrian |
Pseudozonosphaeridium |
Pseudozonosphaeridium
|
USSR(Russian Platform) |
Late Proterozoic |
Cambrian |
Leioligotriletum |
Leioligotriletum
|
USSR(Russian Platform) |
Early Cambrian |
|
Trachyoligotriletum |
Trachyoligotriletum
|
USSR(Russian Platform) |
Early Cambrian |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium
|
USSR(Russian Platform) |
Early Ordovician |
Middle Ordovician |
Veryhachium |
Veryhachium
|
USSR(Russian Platform) |
Early Ordovician |
Middle Ordovician |
Acanthodiacrodium |
Acanthodiacrodium
|
USSR(Russian Platform) |
Early Ordovician |
Middle Ordovician |
Dasydiacrodium |
Dasydiacrodium
|
USSR(Russian Platform) |
Early Ordovician |
Middle Ordovician |
Zonooidium |
Zonooidium
|
USSR(Russian Platform) |
Early Ordovician |
Middle Ordovician |
Hystrichosphaeridium |
Hystrichosphaeridium
|
USSR(Russian Platform) |
Early Ordovician |
Middle Ordovician |
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium
|
USSR(Russian Platform) |
Early Gothlandian |
Late Gothlandian |
Hystrichosphaeridium |
Hystrichosphaeridium
|
USSR(Russian Platform) |
Early Gothlandian |
Late Gothlandian |
Protosphaeridium |
Protosphaeridium
|
USSR(Russian Platform) |
Early Gothlandian |
Late Gothlandian |