Filisphaeridium |
Filisphaeridium tornatum
|
USSR(Estonian SSR) |
Early Cambrian |
|
Filisphaeridium |
Filisphaeridium triviale
|
USSR |
Middle Cambrian |
Late Cambrian |
Filisphaeridium |
Filisphaeridium variabile
|
France |
Middle Jurassic |
|
Filisphaeridium |
Filisphaeridium velvetum
|
Poland |
Middle Cambrian |
|
Filisphaeridium |
Filisphaeridium watrousense
|
Canada |
Jurassic |
|
Filisphaeridium |
Filisphaeridium williereae
|
Belgium |
Silurian |
|
Filisphaeridium |
Filisphaeridium williereae
|
Belgium |
Silurian |
|
Filisphaeridium |
Filisphaeridium zagoraense
|
Morocco |
Tremadocian |
|
Filisphaeridium |
Filisphaeridium zhuravlevae
|
USSR(Kazakh SSR) |
Middle Cambrian |
|
Frankea |
Frankea florigera
|
Canada(Ontario) |
Middle Devonian |
|
Frankea |
Frankea hamata
|
Germany |
Middle Ordovician |
|
Frankea |
Frankea mucronata
|
Belgium |
Silurian |
|
Frankea |
Frankea petropolitana
|
USSR |
Early Cambrian |
|
Frankea |
Frankea ramificata
|
USSR |
Early Cambrian |
|
Globosphaeridium |
Globosphaeridium
|
Nd |
Nd |
|
Globosphaeridium |
Globosphaeridium cerinum
|
Poland |
Early Cambrian |
|
Goniosphaeridium |
Goniosphaeridium
|
Baltic |
Arenigian |
|