Acanthaulax |
Acanthaulax aceras
|
W.Germany(Schleswig) |
Late Aptian |
|
Acanthaulax |
Acanthaulax aculeata
|
Germany |
Kimmeridgian |
|
Acanthaulax |
Acanthaulax angulosa
|
France |
Early Kimmeridgian |
|
Acanthaulax |
Acanthaulax downiei
|
Nd |
Nd |
|
Acanthaulax |
Acanthaulax paliuros
|
Nd |
Nd |
|
Acanthaulax |
Acanthaulax venusta
|
Nd |
Nd |
|
Achilleodinium |
Achilleodinium biformoides
|
Nd |
Nd |
|
Achomosphaera |
Achomosphaera alcicornu
|
Nd |
Nd |
|
Achomosphaera |
Achomosphaera bulla
|
Nd |
Nd |
|
Achomosphaera |
Achomosphaera cambra
|
India(Assam) |
Late Cretaceous |
|
Achomosphaera |
Achomosphaera convexa
|
Nd |
Nd |
|
Achomosphaera |
Achomosphaera crassipellis
|
Australia(Victoria) |
Early Eocene |
|
Achomosphaera |
Achomosphaera delicata
|
Nd |
Nd |
|
Achomosphaera |
Achomosphaera globata
|
Nd |
Nd |
|
Achomosphaera |
Achomosphaera grallaeformis
|
Nd |
Nd |
|
Achomosphaera |
Achomosphaera heterostylis
|
|
Danian |
|
Achomosphaera |
Achomosphaera linifera
|
Australia |
Late Paleocene |
|