Spiniferites |
Spiniferites ramosus
|
North Sea |
Ryazanian |
Albian |
Spiniferites |
Spiniferites speetonensis
|
North Sea |
Late Hauterivian |
Middle Barremian |
Stephodinium |
Stephodinium coronatum
|
North Sea |
Late Hauterivian |
Early Albian |
Stephodinium |
Stephodinium spinulosum
|
North Sea |
Late Aptian |
|
Stiphrosphaeridium |
Stiphrosphaeridium anthophorum
|
North Sea |
Late Volgian |
Early Albian |
Stiphrosphaeridium |
Stiphrosphaeridium dictyophorum
|
North Sea |
Late Volgian |
Early Albian |
Stiphrosphaeridium |
Stiphrosphaeridium arbustum
|
North Sea |
Ryazanian |
|
Subtilisphaera |
Subtilisphaera paeminosa
|
North Sea |
Early Ryazanian |
|
Subtilisphaera |
Subtilisphaera perlucida
|
North Sea |
Late Valanginian |
Early Aptian |
Subtilisphaera |
Subtilisphaera ventriosa
|
North Sea |
Hauterivian |
Aptian |
Surculosphaeridium |
Surculosphaeridium sp.I Dave.,1982
sp. nov. |
North Sea |
Middle Volgian |
Early Valanginian |
Surculosphaeridium |
Surculosphaeridium sp.II Dave.,1982
sp. nov. |
North Sea |
Ryazanian |
Early Valanginian |
Surculosphaeridium |
Surculosphaeridium sp.III Dave.,1982
sp. nov. |
North Sea |
Late Volgian |
Early Hauterivian |
Systematophora |
Systematophora areolata
|
North Sea |
Middle Volgian |
Early Valanginian |
Systematophora |
Systematophora complicata
|
North Sea |
Early Valanginian |
Hauterivian |
Systematophora |
Systematophora palmula
|
North Sea |
Middle Volgian |
Early Valanginian |
Systematophora |
Systematophora vestita
|
North Sea |
Middle Volgian |
Early Valanginian |