Pocockia |
Pocockia
|
Australia(W.Australia) |
Hauterivian |
Early Aptian |
Pocockia |
Pocockia cincta
|
Australia(W.Australia) |
Hauterivian |
Early Aptian |
Pocockia |
Pocockia waltonii
|
Canada(W.Canada) |
Oxfordian |
Late Malm |
Polygonifera |
Polygonifera evittii
|
Nd |
Oxfordian |
Kimmeridgian |
Polykrikos |
Polykrikos
|
Nd |
Nd |
|
Polysphaeridium |
Polysphaeridium amalthei
|
Nd |
Late Toarcian |
|
Polysphaeridium |
Polysphaeridium asperum
|
Nd |
Middle Miocene |
|
Polysphaeridium |
Polysphaeridium belgicum
|
Nd |
Early Eocene |
|
Polysphaeridium |
Polysphaeridium caminuspinum
|
Nd |
Early Sinemurian |
|
Polysphaeridium |
Polysphaeridium deflandrei
|
Nd |
Middle Jurassic |
|
Polysphaeridium |
Polysphaeridium fabium
|
Nd |
Albian |
|
Polysphaeridium |
Polysphaeridium follium
|
Nd |
Albian |
|
Polysphaeridium |
Polysphaeridium fucosum
|
Nd |
Late Cretaceous |
|
Polysphaeridium |
Polysphaeridium laminaspinosum
|
Nd |
Cenomanian |
|
Polysphaeridium |
Polysphaeridium langii
|
Nd |
Hettangian |
Sinemurian |
Polysphaeridium |
Polysphaeridium majus
|
Nd |
Senonian |
|
Polysphaeridium |
Polysphaeridium marsupium
|
Nd |
Albian |
|