Necrobroomea |
Necrobroomea tricornoides
|
Nd |
Nd |
|
Nelsoniella |
Nelsoniella aceras
|
Nd |
Santonian |
Campanian |
Nelsoniella |
Nelsoniella semireticulata
|
Nd |
Santonian |
Campanian |
Nelsoniella |
Nelsoniella tuberculata
|
Nd |
Santonian |
Campanian |
Ovoidinium |
Ovoidinium
|
England(Isle of Wight) |
Cenomanian |
|
Ovoidinium |
Ovoidinium cinctum
|
Nd |
Late Neocomian |
Early Aptian |
Ovoidinium |
Ovoidinium indistinctum
|
Australia(W.Australia) |
Aptian |
Albian |
Ovoidinium |
Ovoidinium kansanum
|
Kansas |
Albian |
|
Ovoidinium |
Ovoidinium ovale
|
Australia(W.Australia) |
Albian |
Cenomanian |
Ovoidinium |
Ovoidinium scabrosum
|
Nd |
Albian |
Early Cenomanian |
Ovoidinium |
Ovoidinium verrucosum
|
Nd |
Cenomanian |
|
Ovoidinium |
Ovoidinium verrucosum
|
Nd |
Albian |
Early Cenomanian |
Ovoidinium |
Ovoidinium waltonii
|
Canada(W.Canada) |
Oxfordian |
Late Malm |
Palaeocystodinium |
Palaeocystodinium australinum
|
Australia(Victoria) |
Paleocene |
|
Palaeocystodinium |
Palaeocystodinium benjaminii
|
Nd |
Maastrichtian |
Danian |
Palaeocystodinium |
Palaeocystodinium deflandrei
|
Nd |
Late Paleocene |
|
Palaeocystodinium |
Palaeocystodinium denticulatum
|
Nd |
Turonian |
|