Arkonites |
Arkonites bilixus
|
North America |
Early Givetian |
Middle Givetian |
Baltisphaeridium |
Baltisphaeridium anfractum
|
North America |
Late Siegenian |
Early Eifelian |
Baltisphaeridium |
Baltisphaeridium distentum
|
North America |
Late Siegenian |
Middle Givetian |
Baltisphaeridium |
Baltisphaeridium microfurcatum
|
North America |
Late Siegenian |
Givetian |
Cymatiosphaera |
Cymatiosphaera acrochorda
|
North America |
Early Givetian |
Middle Givetian |
Cymatiosphaera |
Cymatiosphaera canadensis
|
North America |
Late Siegenian |
Givetian |
Cymatiosphaera |
Cymatiosphaera cornifera
|
North America |
Late Siegenian |
Givetian |
Cymatiosphaera |
Cymatiosphaera multisepta
|
North America |
Emsian |
Middle Givetian |
Cymatiosphaera |
Cymatiosphaera peifferi
|
North America |
Early Givetian |
Middle Frasnian |
Cymatiosphaera |
Cymatiosphaera perimembrana
|
North America |
Early Givetian |
Middle Frasnian |
Cymatiosphaera |
Cymatiosphaera winderi
|
North America |
Emsian |
Middle Givetian |
Dictyotidium |
Dictyotidium cohorum
|
North America |
Early Givetian |
Middle Givetian |
Dictyotidium |
Dictyotidium dictyotum
|
North America |
Early Givetian |
Middle Givetian |
Dictyotidium |
Dictyotidium variatum
|
North America |
Late Siegenian |
Givetian |
Diexallophasis |
Diexallophasis remota
|
North America |
Late Siegenian |
Givetian |
Diexallophasis |
Diexallophasis simplex
|
North America |
Early Givetian |
Middle Givetian |
Divietipellis |
Divietipellis ventricosa
|
North America |
Late Siegenian |
Givetian |