Lophosphaeridium |
Lophosphaeridium ruidum
|
USSR(Russian Platform) |
Early Cambrian |
|
Laminarites |
Laminarites antiquissimus
|
USSR(Russian Platform) |
Early Cambrian |
|
Trachysphaeridium |
Trachysphaeridium complanatum
|
USSR(Russian Platform) |
Early Cambrian |
|
Protoleiosphaeridium |
Protoleiosphaeridium cultum
|
USSR(Russian Platform) |
Middle Cambrian |
|
Trachysphaeridium |
Trachysphaeridium nevelense
|
USSR(Russian Platform) |
Middle Cambrian |
|
Zonosphaeridium |
Zonosphaeridium salebrosum
|
USSR(Russian Platform) |
Middle Cambrian |
|
Zonosphaeridium |
Zonosphaeridium sokolovii
|
USSR(Russian Platform) |
Middle Cambrian |
|
Protoleiosphaeridium |
Protoleiosphaeridium flavum
|
USSR(Russian Platform) |
Middle Cambrian |
|
Zonosphaeridium |
Zonosphaeridium absolutum
|
USSR(Russian Platform) |
Early Ordovician |
|
Leioligotriletum |
Leioligotriletum minutissimus
|
USSR(Russian Platform) |
Early Ordovician |
|
Trachyoligotriletes |
Trachyoligotriletes minutus
|
USSR(Russian Platform) |
Early Ordovician |
|
Lophosphaeridium |
Lophosphaeridium plicatum
|
USSR(Russian Platform) |
Early Ordovician |
|
Acanthosphaeridium |
Acanthosphaeridium aciculare
|
USSR(Russian Platform) |
Early Ordovician |
|
Acanthosphaeridium |
Acanthosphaeridium corrugativum
|
USSR(Russian Platform) |
Early Ordovician |
|
Acanthodiacrodium |
Acanthodiacrodium sukatschevii
|
USSR(Russian Platform) |
Early Ordovician |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium tener
|
USSR(Russian Platform) |
Early Ordovician |
|
Archaeohystrichosphaeridium |
Archaeohystrichosphaeridium sp
|
USSR(Russian Platform) |
Early Ordovician |
|