Gonyaulacysta |
Gonyaulacysta wetzelii
|
Nd |
Nd |
|
Gorgonisphaeridium |
Gorgonisphaeridium ohioense
|
Indiana |
Late Devonian |
Mississippian |
Gorgonisphaeridium |
Gorgonisphaeridium plerispinosum
|
Oklahoma |
Late Devonian |
|
Gracilisphaeridium |
Gracilisphaeridium encantador
|
Sweden |
Early Gothlandian |
|
Gunflintia |
Gunflintia
|
South Africa |
|
|
Guttatisphaeridium |
Guttatisphaeridium pandum
|
Ohio |
Late Devonian |
Mississippian |
Heibergella |
Heibergella asymmetrica
|
Canada |
Late Triassic |
|
Heteraulacacysta |
Heteraulacacysta campanula
|
Alabama |
Middle Eocene |
|
Heteraulacacysta |
Heteraulacacysta campanula
|
Alabama |
Middle Eocene |
|
Heteromorphidion |
Heteromorphidion echinopillum
|
Oklahoma |
Early Devonian |
|
Heterosiphonia |
Heterosiphonia
|
South Africa |
|
|
Hildenbrandia |
Hildenbrandia
|
South Africa |
|
|
Histiocysta |
Histiocysta palla
|
France |
Late Cretaceous |
|
Homotryblium |
Homotryblium plectilum
|
Mississippi |
Oligocene |
|
Horologinella |
Horologinella spinosa
|
Australia |
Late Eocene |
|
Huroniospora |
Huroniospora macroreticulata
|
South Africa |
|
|
Huroniospora |
Huroniospora microreticulata
|
South Africa |
|
|