Aldorfia |
Aldorfia deflandrei
|
England |
Middle Cenomanian |
Early Maestrichtian |
Aldorfia |
Aldorfia dictyota
|
France |
Callovian |
Early Kimmeridgian |
Aldorfia |
Aldorfia dictyota
|
Nd |
Nd |
|
Aldorfia |
Aldorfia dictyota
|
France |
Callovian |
Kimmeridgian |
Aldorfia |
Aldorfia dictyota
|
France |
Late Bajocian |
Kimmeridgian |
Aldorfia |
Aldorfia vectensis
|
Nd |
Nd |
|
Alexandrium |
Alexandrium tamarense
|
Nd |
Nd |
|
Algidasphaeridium |
Algidasphaeridium minutum
|
Nd |
Nd |
|
Alisocysta |
Alisocysta circumtabulata
|
England |
Maestrichtian |
Paleocene |
Alisocysta |
Alisocysta margarita
|
England |
Middle Thanetian |
|
Alisocysta |
Alisocysta reticulata
|
England |
Middle Danian |
|
Alterbidinium |
Alterbidinium
|
Nd |
Nd |
|
Alterbidinium |
Alterbidinium acutulum
|
Nd |
Nd |
|
Alterbidinium |
Alterbidinium daveyi
|
Nd |
Nd |
|
Ambonosphaera |
Ambonosphaera calloviana
|
Nd |
Nd |
|
Ambonosphaera |
Ambonosphaera utera
|
Nd |
Nd |
|
Amiculosphaera |
Amiculosphaera umbraculum
|
Europe(S.Europe) |
Turonian |
Early Pliocene |