Orthosphaeridium |
Orthosphaeridium densiverrucosum
|
Sweden |
Ordovician |
|
Orthosphaeridium |
Orthosphaeridium inflatum
|
Nd |
Nd |
|
Orthosphaeridium |
Orthosphaeridium insculptum
|
Oklahoma |
Late Ordovician |
|
Orthosphaeridium |
Orthosphaeridium octospinosum
|
Baltic |
Late Ordovician |
|
Orthosphaeridium |
Orthosphaeridium rectangulare
|
Oklahoma |
Late Ordovician |
|
Orthosphaeridium |
Orthosphaeridium rectangulare
|
Baltic |
Late Ordovician |
|
Orthosphaeridium |
Orthosphaeridium rectangulare
|
Sweden |
Ordovician |
|
Orthosphaeridium |
Orthosphaeridium trabeculatum
|
Sweden |
Ordovician |
|
Orthosphaeridium |
Orthosphaeridium vibrissiferum
|
Oklahoma |
Middle Ordovician |
|
Ovum |
Ovum hispidum
|
Nd |
Nd |
|
Ovum |
Ovum hispidum
|
Nd |
Nd |
|
Ozotobrachion |
Ozotobrachion dicrus
|
Nd |
Nd |
|
Palaeostomocystis |
Palaeostomocystis apiculata
|
Australia(W.Australia) |
Senonian |
|
Palaeostomocystis |
Palaeostomocystis apiculata
|
Australia(W.Australia) |
Campanian |
|
Palaeostomocystis |
Palaeostomocystis chytra
|
Australia(W.Australia) |
Senonian |
|
Palaeostomocystis |
Palaeostomocystis chytra
|
California |
Maastrichtian |
Danian |
Palaeostomocystis |
Palaeostomocystis cretacea
|
Germany |
Senonian |
|