Duvernaysphaera |
Duvernaysphaera angelae
|
North America |
Early Givetian |
Middle Givetian |
Duvernaysphaera |
Duvernaysphaera tenuicingulata
|
North America |
Late Emsian |
Frasnian |
Eisenackidium |
Eisenackidium appendiculum
|
North America |
Early Givetian |
Middle Givetian |
Estiastra |
Estiastra rhytidoa
|
North America |
Early Givetian |
Middle Givetian |
Exochoderma |
Exochoderma arca
|
North America |
Early Givetian |
Middle Givetian |
Exochoderma |
Exochoderma triangulata
|
North America |
Early Givetian |
Middle Givetian |
Goniolopadion |
Goniolopadion prolixum
|
North America |
Early Givetian |
Middle Givetian |
Gorgonisphaeridium |
Gorgonisphaeridium cumulatum
|
North America |
Late Siegenian |
Middle Givetian |
Gorgonisphaeridium |
Gorgonisphaeridium granatum
|
North America |
Late Siegenian |
Middle Givetian |
Gorgonisphaeridium |
Gorgonisphaeridium inflatum
|
North America |
Early Givetian |
Middle Givetian |
Hapsidopalla |
Hapsidopalla chela
|
North America |
Early Givetian |
Middle Givetian |
Hapsidopalla |
Hapsidopalla exornata
|
North America |
Late Eifelian |
Givetian |
Hapsidopalla |
Hapsidopalla invenusta
|
North America |
Early Givetian |
Middle Givetian |
Leiofusa |
Leiofusa pyrena
|
North America |
Early Givetian |
Middle Givetian |
Lophosphaeridium |
Lophosphaeridium dumale
|
North America |
Late Emsian |
Early Eifelian |
Lophosphaeridium |
Lophosphaeridium ochthos
|
North America |
Early Givetian |
Middle Givetian |
Micrhystridium |
Micrhystridium stellatum
|
North America |
Late Siegenian |
Middle Givetian |