Baltisphaeridium |
Baltisphaeridium lasium
|
Worldwide |
Tremadocian |
|
Baltisphaeridium |
Baltisphaeridium latviense
|
USSR(Russian Platform) |
Middle Cambrian |
|
Baltisphaeridium |
Baltisphaeridium medium
|
Nd |
Nd |
|
Baltisphaeridium |
Baltisphaeridium murciatum
|
Worldwide |
Sheinwoodian |
|
Baltisphaeridium |
Baltisphaeridium parvulisidereum
|
Nd |
Nd |
|
Baltisphaeridium |
Baltisphaeridium plicatispinae
|
Nd |
Nd |
|
Baltisphaeridium |
Baltisphaeridium pseudofaveolatum
|
USSR(Russian Platform) |
Middle Cambrian |
|
Baltisphaeridium |
Baltisphaeridium spiculum
|
Nd |
Late Tremadocian |
|
Barakella |
Barakella fortunata
|
Nd |
Nd |
|
Barathrisphaeridium |
Barathrisphaeridium pumilispinosum
|
Nd |
Nd |
|
Botryococcus |
Botryococcus
|
Nd |
Nd |
|
Buedingiisphaeridium |
Buedingiisphaeridium tremadocum
|
Canada(Alberta) |
Early Tremadocian |
|
Caldariola |
Caldariola glabra
|
Nd |
Late Tremadocian |
Ashgillian |
Calyxiella |
Calyxiella izhoriensis
|
USSR(Russian Platform) |
Late Cambrian |
|
Carminella |
Carminella maplewoodensis
|
Worldwide |
Late Aeronian |
Gorstian |
Cheleutochroa |
Cheleutochroa diaphorosa
|
Worldwide |
Actonian |
Ashgillian |
Cheleutochroa |
Cheleutochroa gymnobrachiata
|
Worldwide |
Ashgillian |
|