Lunulidia |
Lunulidia lunula
|
Baltic |
Ordovician |
|
Micrhystridium |
Micrhystridium inconspicuum
|
France |
Cretaceous |
|
Micrhystridium |
Micrhystridium stellatum
|
USSR |
Ordovician |
|
Nucellosphaeridium |
Nucellosphaeridium deunffii
|
Baltic |
Late Gothlandian |
|
Ooidium |
Ooidium rossicum
|
USSR |
Cambrian |
|
Orygmatosphaeridium |
Orygmatosphaeridium ruminatum
|
Baltic |
Ordovician |
|
Paleopedicistus |
Paleopedicistus rodeoensis
|
Canada |
Devonian |
|
Peteinosphaeridium |
Peteinosphaeridium bergstroemii
|
Canada |
Ordovician |
|
Poikilofusa |
Poikilofusa spinata
|
Canada |
Ordovician |
|
Polyedrosphaeridium |
Polyedrosphaeridium hidusense
|
Canada |
Early Cambrian |
|
Polyedryxium |
Polyedryxium deflandrei
|
Canada |
Devonian |
|
Polyplanifer |
Polyplanifer exoticum
|
Spain |
Silurian |
|
Priscogalea |
Priscogalea barbara
|
USSR(Far East) |
Ordovician |
|
Priscotheca |
Priscotheca raia
|
Africa |
Tremadocian |
|
Protoocridosphaeridium |
Protoocridosphaeridium elandii
|
Switzerland |
Middle Cambrian |
|
Protosphaeridium |
Protosphaeridium densum
|
USSR |
Vendian |
|
Pterospermopsimorpha |
Pterospermopsimorpha kelar
|
Switzerland |
Nd |
|