Archaesphaera |
Archaesphaera minima
|
USSR(Siberia) |
Silurian |
Early Devonian |
Azonotriletes |
Azonotriletes ovalis
|
USSR(Siberia) |
Frasnian |
|
Azonotriletes |
Azonotriletes platyrugosus
|
USSR(Siberia) |
Early Tournaisian |
|
Azonotriletes |
Azonotriletes platyrugosus
|
USSR(Siberia) |
Early Tournaisian |
Early Tournaisian |
Baltisphaeridium |
Baltisphaeridium echinodermum
|
USSR(Siberia) |
Late Gothlandian |
Early Devonian |
Conochitina |
Conochitina sp
|
USSR(Siberia) |
Silurian |
Frasnian |
Cyathochitina |
Cyathochitina infundibuliformis
|
USSR(Siberia) |
Frasnian |
|
Cyathochitina |
Cyathochitina sp
|
USSR(Siberia) |
Givetian |
|
Cymatiosphaera |
Cymatiosphaera sp
|
USSR(Siberia) |
Silurian |
|
Desmochitina |
Desmochitina sp
|
USSR(Siberia) |
Frasnian |
|
Dicommopalla |
Dicommopalla macadamii
|
USSR(Siberia) |
Late Gothlandian |
Early Devonian |
Gorgonisphaeridium |
Gorgonisphaeridium evexispinosum
|
USSR(Siberia) |
Frasnian |
|
Gorgonisphaeridium |
Gorgonisphaeridium spicatum
|
USSR(Siberia) |
Frasnian |
|
Hoegisphaera |
Hoegisphaera glabra
|
USSR(Siberia) |
Eifelian |
|
Hymenozonotriletes |
Hymenozonotriletes longus
|
USSR(Siberia) |
Late Tournaisian |
|
Hymenozonotriletes |
Hymenozonotriletes perplexus
|
USSR(Siberia) |
Late Tournaisian |
|
Hymenozonotriletes |
Hymenozonotriletes polyacanthus
|
USSR(Siberia) |
Silurian |
|