Prolixosphaeridium |
Prolixosphaeridium capitatum
|
Nd |
Nd |
|
Prolixosphaeridium |
Prolixosphaeridium conulum
|
Nd |
Nd |
|
Prolixosphaeridium |
Prolixosphaeridium granulosum
|
Nd |
Nd |
|
Prolixosphaeridium |
Prolixosphaeridium mixtispinosum
|
Nd |
Nd |
|
Prolixosphaeridium |
Prolixosphaeridium parvispinum
|
Nd |
Nd |
|
Protoellipsodinium |
Protoellipsodinium clavulus
|
Nd |
Nd |
|
Protoellipsodinium |
Protoellipsodinium spinocristatum
|
Nd |
Nd |
|
Protoellipsodinium |
Protoellipsodinium spinosum
|
Nd |
Nd |
|
Psaligonyaulax |
Psaligonyaulax cypraea
|
Nd |
Nd |
|
Psaligonyaulax |
Psaligonyaulax deflandrei
|
Nd |
Nd |
|
Psaligonyaulax |
Psaligonyaulax dualis
|
Canada(NWT,Franklin) |
Late Oxfordian |
Kimmeridgian |
Pseudoceratium |
Pseudoceratium dettmanniae
|
England(Cambridgeshire) |
Early Cenomanian |
|
Pseudoceratium |
Pseudoceratium expolitum
|
Nd |
Nd |
|
Pseudoceratium |
Pseudoceratium gochtii
|
Nd |
Nd |
|
Pseudoceratium |
Pseudoceratium nudum
|
Nd |
Nd |
|
Pseudoceratium |
Pseudoceratium parvum
|
Nd |
Nd |
|
Pseudoceratium |
Pseudoceratium pelliferum
|
Nd |
Nd |
|