Leiosphaeridia |
Leiosphaeridia laevigata
|
USSR(Siberia) |
Silurian |
|
Lophosphaeridium |
Lophosphaeridium parverarum
|
USSR(Siberia) |
Silurian |
|
Hymenozonotriletes |
Hymenozonotriletes polyacanthus
|
USSR(Siberia) |
Silurian |
|
Sphaerochitina |
Sphaerochitina sphaerocephala
|
USSR(Siberia) |
Silurian |
|
Leiosphaeridia |
Leiosphaeridia sp
|
USSR(Siberia) |
Silurian |
|
Cymatiosphaera |
Cymatiosphaera sp
|
USSR(Siberia) |
Silurian |
|
Trachysphaeridium |
Trachysphaeridium pellucidum
|
USSR(Siberia) |
Silurian |
|
Archaesphaera |
Archaesphaera minima
|
USSR(Siberia) |
Silurian |
Early Devonian |
Conochitina |
Conochitina sp
|
USSR(Siberia) |
Silurian |
Frasnian |
Rhabdochitina |
Rhabdochitina sp
|
USSR(Siberia) |
Silurian |
Frasnian |
Dicommopalla |
Dicommopalla macadamii
|
USSR(Siberia) |
Late Gothlandian |
Early Devonian |
Baltisphaeridium |
Baltisphaeridium echinodermum
|
USSR(Siberia) |
Late Gothlandian |
Early Devonian |
Retusotriletes |
Retusotriletes subgibberosus
|
USSR(Siberia) |
Late Gothlandian |
Early Devonian |
Hoegisphaera |
Hoegisphaera glabra
|
USSR(Siberia) |
Eifelian |
|
Cyathochitina |
Cyathochitina sp
|
USSR(Siberia) |
Givetian |
|
Desmochitina |
Desmochitina sp
|
USSR(Siberia) |
Frasnian |
|
Lagenochitina |
Lagenochitina sp
|
USSR(Siberia) |
Frasnian |
|