Pterospermella |
Pterospermella reticulata
|
Oklahoma |
Late Devonian |
|
Pterospermella |
Pterospermella sp
|
Oklahoma |
Early Devonian |
|
Pulvinosphaeridium |
Pulvinosphaeridium parvum
|
New York |
Middle Gothlandian |
|
Raphidodinium |
Raphidodinium fucatum
|
France |
Cretaceous |
|
Renidinium |
Renidinium membraniferum
|
Germany |
Paleocene |
|
Rhaetogonyaulax |
Rhaetogonyaulax arctica
|
Nd |
Nd |
|
Rhaetogonyaulax |
Rhaetogonyaulax rhaetica
|
Austria |
Late Triassic |
|
Rhiptosocherma |
Rhiptosocherma improcera
|
Oklahoma |
Middle Ordovician |
|
Rhombodinium |
Rhombodinium glabrum
|
England |
Eocene |
|
Rhopaliophora |
Rhopaliophora impexa
|
Indiana |
Late Ordovician |
|
Riculasphaera |
Riculasphaera fissa
|
Oklahoma |
Early Devonian |
|
Rottnestia |
Rottnestia borussica
|
Germany |
Early Eocene |
Late Oligocene |
Rugubivesiculites |
Rugubivesiculites rugosus
|
Nd |
Nd |
|
Saeptodinium |
Saeptodinium eurypylum
|
Canada(Arctic) |
Cretaceous |
|
Saeptodinium |
Saeptodinium hansonianum
|
Nd |
Nd |
|
Samlandia |
Samlandia chlamydophora
|
Germany |
Eocene |
Early Oligocene |
Schematophora |
Schematophora speciosa
|
Australia |
Eocene |
|