Gonyaulacysta |
Gonyaulacysta cassidata
|
North Sea |
Middle Barremian |
Albian |
Gonyaulacysta |
Gonyaulacysta centriconnata
|
North Sea |
Late Volgian |
Early Ryazanian |
Gonyaulacysta |
Gonyaulacysta cladophora
|
North Sea |
Valanginian |
Hauterivian |
Gonyaulacysta |
Gonyaulacysta diutina
|
North Sea |
Middle Volgian |
Early Albian |
Gonyaulacysta |
Gonyaulacysta exsanguia
|
North Sea |
Late Volgian |
Barremian |
Gonyaulacysta |
Gonyaulacysta fastigiata
|
North Sea |
Late Volgian |
Hauterivian |
Gonyaulacysta |
Gonyaulacysta helicoidea
|
North Sea |
Middle Volgian |
Early Albian |
Gonyaulacysta |
Gonyaulacysta jurassica
|
North Sea |
Middle Volgian |
Early Ryazanian |
Gonyaulacysta |
Gonyaulacysta kostromiensis
|
North Sea |
Valanginian |
Middle Barremian |
Gonyaulacysta |
Gonyaulacysta ordocava
|
North Sea |
Early Hauterivian |
|
Gonyaulacysta |
Gonyaulacysta perforobtusa
|
North Sea |
Late Hauterivian |
|
Gonyaulacysta |
Gonyaulacysta sp.A Dave.,1979
sp. nov. |
North Sea |
Late Volgian |
Ryazanian |
Heslertonia |
Heslertonia heslertonensis
|
North Sea |
Middle Volgian |
Early Aptian |
Heslertonia |
Heslertonia pellucida
|
North Sea |
Middle Volgian |
Early Aptian |
Hystrichodinium |
Hystrichodinium furcatum
|
North Sea |
Early Barremian |
Middle Barremian |
Hystrichodinium |
Hystrichodinium ramoides
|
North Sea |
Middle Barremian |
|
Hystrichodinium |
Hystrichodinium voigtii
|
North Sea |
Middle Volgian |
Albian |