Comasphaeridium |
Comasphaeridium capillum
|
USSR(Siberia) |
Silurian |
|
Micrhystridium |
Micrhystridium apiculatum
|
USSR(Siberia) |
Cambrian |
|
Micrhystridium |
Micrhystridium certum
|
USSR(Siberia) |
Late Precambrian |
Early Cambrian |
Micrhystridium |
Micrhystridium duplex
|
USSR(Siberia) |
Cambrian |
|
Micrhystridium |
Micrhystridium insuetum
|
USSR(Siberia) |
Late Precambrian |
Early Cambrian |
Micrhystridium |
Micrhystridium perleve
|
USSR(Siberia) |
Late Precambrian |
|
Micrhystridium |
Micrhystridium unilaterale
|
USSR(Siberia) |
Cambrian |
|
Pulvinosphaeridium |
Pulvinosphaeridium ansanellum
|
USSR(Siberia) |
Wenlockian |
|
Pulvinosphaeridium |
Pulvinosphaeridium novum
|
USSR(Siberia) |
Early Gothlandian |
|
Veryhachium |
Veryhachium connexum
|
USSR(Siberia) |
Late Ordovician |
|
Veryhachium |
Veryhachium parvum
|
USSR(Siberia) |
Early Gothlandian |
|
Comasphaeridium |
Comasphaeridium villosum
|
USSR(Ukrainian SSR) |
Early Cambrian |
|
Filisphaeridium |
Filisphaeridium brachyspinosum
|
USSR(Ukrainian SSR) |
Early Cambrian |
|
Filisphaeridium |
Filisphaeridium staplini
|
USSR(Ukrainian SSR) |
Late Gothlandian |
|
Comasphaeridium |
Comasphaeridium brachyspinosum
|
USSR(Ukrainian SSR) |
Early Cambrian |
|
Heliosphaeridium |
Heliosphaeridium lubomlense
|
USSR(Ukrainian SSR) |
Early Cambrian |
|
Micrhystridium |
Micrhystridium breviradiatum
|
USSR(Ukrainian SSR) |
Early Gothlandian |
|