Andalusiella |
Andalusiella mauthei
|
Nd |
Nd |
|
Anthosphaeridium |
Anthosphaeridium convolvuloides
|
Nd |
Nd |
|
Apectodinium |
Apectodinium homomorphum
|
Nd |
Nd |
|
Aprobolocysta |
Aprobolocysta eilema
|
Nd |
Nd |
|
Aptea |
Aptea polymorpha
|
Nd |
Nd |
|
Apteodinium |
Apteodinium granulatum
|
Nd |
Nd |
|
Aquadulcum |
Aquadulcum serpens
|
Nd |
Nd |
|
Araneosphaera |
Araneosphaera araneosa
|
Nd |
Nd |
|
Areoligera |
Areoligera senonensis
|
Nd |
Nd |
|
Areosphaeridium |
Areosphaeridium diktyoplokum
|
Nd |
Nd |
|
Arkellidinium |
Arkellidinium triapertum
|
Nd |
Late Callovian |
|
Arpylorus |
Arpylorus antiquus
|
Nd |
Nd |
|
Artemisiocysta |
Artemisiocysta cladodichotoma
|
Nd |
Nd |
|
Ascodinium |
Ascodinium acrophorum
|
Nd |
Nd |
|
Ataxiodinium |
Ataxiodinium choane
|
Nd |
Nd |
|
Athigmatocysta |
Athigmatocysta glabra
|
Nd |
Nd |
|
Atopodinium |
Atopodinium prostatum
|
Nd |
Nd |
|