Acanthaulax |
Acanthaulax acanthosphaera
|
Nd |
Early Oxfordian |
|
Acanthaulax |
Acanthaulax paliuros
|
Nd |
Oxfordian |
|
Acanthaulax |
Acanthaulax spinosissima
|
Nd |
Late Jurassic |
|
Acanthaulax |
Acanthaulax venusta
|
Nd |
Middle Oxfordian |
Kimmeridgian |
Acanthogonyaulax |
Acanthogonyaulax
|
Nd |
Nd |
|
Achomosphaera |
Achomosphaera alcicornu
|
Nd |
Oligocene |
|
Achomosphaera |
Achomosphaera cambra
|
Nd |
Late Cretaceous |
|
Achomosphaera |
Achomosphaera convexa
|
Nd |
Late Cretaceous |
|
Achomosphaera |
Achomosphaera delicata
|
Nd |
Late Cretaceous |
|
Achomosphaera |
Achomosphaera globata
|
Nd |
Late Cretaceous |
|
Achomosphaera |
Achomosphaera grallaeformis
|
Nd |
Oligocene |
|
Achomosphaera |
Achomosphaera hirundo
|
Nd |
Early Cretaceous |
|
Achomosphaera |
Achomosphaera hyperacantha
|
Nd |
Miocene |
|
Achomosphaera |
Achomosphaera neptuni
|
Nd |
Early Cretaceous |
|
Achomosphaera |
Achomosphaera operculata
|
Nd |
Late Cretaceous |
|
Achomosphaera |
Achomosphaera ramulifera
|
Nd |
Late Cretaceous |
|
Achomosphaera |
Achomosphaera ramulifera
|
Nd |
Early Eocene |
|