Cyathidites |
Cyathidites minor
|
Alaska |
Kimmeridgian |
Campanian |
Cyclonephelium |
Cyclonephelium compactum
|
Alaska |
Aptian |
Campanian |
Cyclonephelium |
Cyclonephelium distinctum
|
Alaska |
Kimmeridgian |
Campanian |
Cyclonephelium |
Cyclonephelium membraniphorum
|
Alaska |
Aptian |
Cenomanian |
Cyclonephelium |
Cyclonephelium paucimarginatum
|
Alaska |
Turonian |
Coniacian |
Cyclonephelium |
Cyclonephelium vannophorum
|
Alaska |
Cenomanian |
|
Cymatiosphaera |
Cymatiosphaera sp
|
Alaska |
Late Triassic |
Early Jurassic |
Deflandrea |
Deflandrea acuminata
|
Alaska |
Santonian |
Campanian |
Deflandrea |
Deflandrea amphiata
|
Alaska |
Santonian |
Campanian |
Deflandrea |
Deflandrea biapertura
|
Alaska |
Maastrichtian |
|
Deflandrea |
Deflandrea decorosa
|
Alaska |
Santonian |
Campanian |
Deflandrea |
Deflandrea ditissima
|
Alaska |
Santonian |
Campanian |
Deflandrea |
Deflandrea microarma
|
Alaska |
Campanian |
|
Deflandrea |
Deflandrea phosphoritica
|
Alaska |
Early Tertiary |
|
Deflandrea |
Deflandrea pirnaensis
|
Alaska |
Cenomanian |
Campanian |
Deflandrea |
Deflandrea sp
|
Alaska |
Turonian |
Coniacian |
Deltoidospora |
Deltoidospora juncta
|
Alaska |
Permian |
Tithonian |