Acanthaulax |
Acanthaulax crispa
|
England |
Middle Bajocian |
Late Bajocian |
Acanthaulax |
Acanthaulax crispa
|
France |
Middle Bajocian |
Late Bajocian |
Acanthaulax |
Acanthaulax granuligera
|
Nd |
Nd |
|
Acanthaulax |
Acanthaulax senta
|
Nd |
Nd |
|
Acanthaulax |
Acanthaulax wilsonii
|
Nd |
Nd |
|
Achilleodinium |
Achilleodinium biformoides
|
England |
Ypresian |
Rupelian |
Achomosphaera |
Achomosphaera
|
Nd |
Nd |
|
Achomosphaera |
Achomosphaera alcicornu
|
England |
Thanetian |
Chattian |
Achomosphaera |
Achomosphaera andalousiensis
|
Europe(S.Europe) |
Late Pliensbachian |
Middle Serravallian |
Achomosphaera |
Achomosphaera neptuni
|
England |
Portlandian |
Aptian |
Achomosphaera |
Achomosphaera ramulifera
|
Nd |
Nd |
|
Adnatosphaeridium |
Adnatosphaeridium caulleryi
|
Nd |
Nd |
|
Adnatosphaeridium |
Adnatosphaeridium multispinosum
|
Canada(Eastern Offshore) |
Eocene |
|
Adnatosphaeridium |
Adnatosphaeridium vittatum
|
Nd |
Nd |
|
Aldorfia |
Aldorfia
|
Nd |
Nd |
|
Aldorfia |
Aldorfia aldorfensis
|
England |
Late Bajocian |
Early Callovian |
Aldorfia |
Aldorfia aldorfensis
|
France |
Late Bajocian |
Early Callovian |