Gonyaulax |
Gonyaulax scottii
|
Australia(W.Australia) |
Early Kimmeridgian |
Middle Kimmeridgian |
Gonyaulax |
Gonyaulax serrata
|
New Guinea(Papua) |
Late Jurassic |
Neocomian |
Gonyaulax |
Gonyaulax superornata
|
W.Germany |
Middle Dogger |
|
Gonyaulax |
Gonyaulax tenuiceras
|
W.Germany(Schleswig) |
Late Aptian |
|
Gonyaulax |
Gonyaulax transparens
|
England(Yorkshire) |
Early Callovian |
|
Gonyaulax |
Gonyaulax wetzelii
|
Germany |
Senonian |
|
Hystrichogonyaulax |
Hystrichogonyaulax
|
Europe |
Middle Jurassic |
Late Jurassic |
Hystrichogonyaulax |
Hystrichogonyaulax cornigera
|
France(Poitou) |
Bajocian |
Bathonian |
Hystrichogonyaulax |
Hystrichogonyaulax nealei
|
England(Yorkshire) |
Oxfordian |
|
Hystrichokolpoma |
Hystrichokolpoma clavigerum
|
France(Paris Basin) |
Senonian |
|
Hystrichokolpoma |
Hystrichokolpoma xipheum
|
W.Germany |
Middle Miocene |
|
Hystrichosphaera |
Hystrichosphaera hyperacantha
|
Australia(Victoria) |
Miocene |
|
Hystrichosphaera |
Hystrichosphaera leptoderma
|
W.Germany |
Middle Oligocene |
Middle Miocene |
Hystrichosphaera |
Hystrichosphaera xanthiopyxides
|
Germany |
Late Senonian |
|
Hystrichosphaeridium |
Hystrichosphaeridium aemulum
|
France(Calvados) |
Oxfordian |
|
Hystrichosphaeridium |
Hystrichosphaeridium alcicornu
|
Poland |
Oligocene |
|
Hystrichosphaeridium |
Hystrichosphaeridium alcicornu
|
W.Germany |
Oligocene |
|