Hystrichosphaeridium |
Hystrichosphaeridium subrecurvum
|
USSR(Russian Platform) |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium longispinosum
|
USSR(Russian Platform) |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium conspicuum
|
USSR(Russian Platform) |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium monstruosum
|
USSR(Russian Platform) |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium scapigerum
|
USSR(Russian Platform) |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium marginatum
sp. nov. |
USSR(Russian Platform) |
Early Ordovician |
|
Veryhachium |
Veryhachium trispinosum
|
USSR(Russian Platform) |
Early Ordovician |
|
Leiofusa |
Leiofusa vittatum
|
USSR(Russian Platform) |
Early Ordovician |
|
Leioligotriletum |
Leioligotriletum minutissimus
|
USSR(Russian Platform) |
Early Cambrian |
Middle Cambrian |
Trachyoligotriletes |
Trachyoligotriletes minutus
|
USSR(Russian Platform) |
Early Cambrian |
Middle Cambrian |
Leioligotriletum |
Leioligotriletum minutissimus
|
USSR(Russian Platform) |
Late Gothlandian |
|
Protoleiosphaeridium |
Protoleiosphaeridium circumscissum
|
USSR(Russian Platform) |
Late Gothlandian |
|
Protoleiosphaeridium |
Protoleiosphaeridium perfoliatum
|
USSR(Russian Platform) |
Late Gothlandian |
|
Protoleiosphaeridium |
Protoleiosphaeridium sp
|
USSR(Russian Platform) |
Late Gothlandian |
|
Zonosphaeridium |
Zonosphaeridium aquicusum
|
USSR(Russian Platform) |
Late Gothlandian |
|
Zonosphaeridium |
Zonosphaeridium perfusum
|
USSR(Russian Platform) |
Late Gothlandian |
|
Zonosphaeridium |
Zonosphaeridium cavernosum
|
USSR(Russian Platform) |
Late Gothlandian |
|