Athabascaella |
Athabascaella rossii
|
Canada(Alberta) |
Tremadocian |
|
Athabascaella |
Athabascaella sunwaptana
|
Canada(Alberta) |
Tremadocian |
|
Axisphaeridium |
Axisphaeridium cylindratum
|
Nd |
Nd |
|
Baiomeniscus |
Baiomeniscus camurus
|
Worldwide |
Late Rhuddanian |
Early Steinmergel |
Baltisphaeridium |
Baltisphaeridium
|
Nd |
Nd |
|
Baltisphaeridium |
Baltisphaeridium aliquigranulum
|
Worldwide |
Ashgillian |
|
Baltisphaeridium |
Baltisphaeridium aniae
|
Worldwide |
Aeronian |
|
Baltisphaeridium |
Baltisphaeridium archaicum
|
Nd |
Nd |
|
Baltisphaeridium |
Baltisphaeridium areolatum
|
Tunisia |
Ludlovian |
|
Baltisphaeridium |
Baltisphaeridium areolatum
|
Worldwide |
Gorstian |
|
Baltisphaeridium |
Baltisphaeridium basiconstrictum
|
Nd |
Nd |
|
Baltisphaeridium |
Baltisphaeridium capillatum
|
Worldwide |
Aeronian |
Telychian |
Baltisphaeridium |
Baltisphaeridium crinitum
|
Canada(Newfoundland) |
Late Cambrian |
Ordovician |
Baltisphaeridium |
Baltisphaeridium dasos
|
Nd |
Nd |
|
Baltisphaeridium |
Baltisphaeridium dubium
|
Poland |
Early Cambrian |
|
Baltisphaeridium |
Baltisphaeridium dubium
|
USSR(Russian Platform) |
Early Cambrian |
|
Baltisphaeridium |
Baltisphaeridium furcosum
|
Worldwide |
Early Sheinwoodian |
|