Stephanelytron |
Stephanelytron scarburghense
|
Russian Platform |
Bathonian |
Kimmeridgian |
Stephanelytron |
Stephanelytron redcliffense
|
Russian Platform |
Bathonian |
Kimmeridgian |
Stephanelytron |
Stephanelytron sp
|
Russian Platform |
Oxfordian |
Middle Oxfordian |
Stiphrosphaeridium |
Stiphrosphaeridium dictyophorum
|
Russian Platform |
Ryazanian |
|
Subtilisphaera |
Subtilisphaera inaffecta
|
Russian Platform |
Late Kimmeridgian |
Early Volgian |
Subtilisphaera |
Subtilisphaera paeminosa
|
Russian Platform |
Late Kimmeridgian |
Early Volgian |
Surculosphaeridium |
Surculosphaeridium vestitum
|
Russian Platform |
Late Callovian |
Early Oxfordian |
Systematophora |
Systematophora valensii
|
Russian Platform |
Late Callovian |
Ryazanian |
Systematophora |
Systematophora penicillata
|
Russian Platform |
Bathonian |
Ryazanian |
Systematophora |
Systematophora areolata
|
Russian Platform |
Late Callovian |
Ryazanian |
Systematophora |
Systematophora sp
|
Russian Platform |
Late Callovian |
Ryazanian |
Systematophora |
Systematophora daveyi
|
Russian Platform |
Late Callovian |
Ryazanian |
Systematophora |
Systematophora valensii
|
Russian Platform |
Late Callovian |
Kimmeridgian |
Systematophora |
Systematophora sp
|
Russian Platform |
Late Callovian |
Middle Volgian |
Tasmanites |
Tasmanites sp
|
Russian Platform |
Late Callovian |
Volgian |
Trichodinium |
Trichodinium sp
|
Russian Platform |
Kimmeridgian |
Middle Volgian |
Trichodinium |
Trichodinium scarburghense
|
Russian Platform |
Late Callovian |
Kimmeridgian |