Glaphyrocysta |
Glaphyrocysta semitecta
|
Northern Hemisphere |
Lutetian |
Early Rupelian |
Gramocysta |
Gramocysta verricula
|
Southern Hemisphere |
Serravallian |
Tortonian |
Gramocysta |
Gramocysta verricula
|
Northern Hemisphere |
Serravallian |
Tortonian |
Habibacysta |
Habibacysta tectata
|
Southern Hemisphere |
Serravallian |
Holocene |
Habibacysta |
Habibacysta tectata
|
Northern Hemisphere |
Serravallian |
Holocene |
Hemiplacophora |
Hemiplacophora semilunifera
|
Northern Hemisphere |
Middle Bartonian |
Late Priabonian |
Hemiplacophora |
Hemiplacophora semilunifera
|
Southern Hemisphere |
Middle Bartonian |
Late Priabonian |
Heteraulacacysta |
Heteraulacacysta porosa
|
Southern Hemisphere |
Santonian |
Middle Bartonian |
Heteraulacacysta |
Heteraulacacysta porosa
|
Northern Hemisphere |
Santonian |
Middle Bartonian |
Heterosphaeridium |
Heterosphaeridium difficile
|
Southern Hemisphere |
Early Turonian |
Coniacian |
Heterosphaeridium |
Heterosphaeridium difficile
|
Northern Hemisphere |
Early Turonian |
Coniacian |
Homotryblium |
Homotryblium floripes
|
Southern Hemisphere |
Middle Lutetian |
Messinian |
Homotryblium |
Homotryblium floripes
|
Northern Hemisphere |
Middle Lutetian |
Messinian |
Homotryblium |
Homotryblium tenuispinosum
|
Southern Hemisphere |
Late Thanetian |
Serravallian |
Homotryblium |
Homotryblium tenuispinosum
|
Northern Hemisphere |
Late Thanetian |
Serravallian |
Hystrichokolpoma |
Hystrichokolpoma bulbosum
|
Southern Hemisphere |
Late Maestrichtian |
Early Danian |
Hystrichokolpoma |
Hystrichokolpoma bulbosum
|
Northern Hemisphere |
Late Maestrichtian |
Early Danian |