Micrhystridium |
Micrhystridium lappellum
|
Oklahoma |
Late Gedinnian |
|
Micrhystridium |
Micrhystridium octospinosum
|
Canada(Alberta) |
Frasnian |
|
Micrhystridium |
Micrhystridium pascheri
|
Canada(Alberta) |
Late Famennian |
Mississippian |
Micrhystridium |
Micrhystridium pascheri
|
Canada(Saskatchewan) |
Late Famennian |
Mississippian |
Micrhystridium |
Micrhystridium pascheri
|
Canada(NWT) |
Late Famennian |
Mississippian |
Micrhystridium |
Micrhystridium paucispinum
|
Canada(Ontario) |
Eifelian |
Givetian |
Micrhystridium |
Micrhystridium profusum
|
Ohio |
Middle Famennian |
Late Famennian |
Micrhystridium |
Micrhystridium pustulatum
|
Canada(Ontario) |
Eifelian |
Givetian |
Micrhystridium |
Micrhystridium sericum
|
Canada(Ontario) |
Eifelian |
Givetian |
Micrhystridium |
Micrhystridium stellatum
|
Canada(Ontario) |
Late Siegenian |
Middle Givetian |
Micrhystridium |
Micrhystridium vigintispinum
|
Canada(Alberta) |
Frasnian |
|
Micrhystridium |
Micrhystridium vigintispinum
|
Canada(NWT) |
Givetian |
Frasnian |
Multiplicisphaeridium |
Multiplicisphaeridium amitum
|
Indiana |
Late Frasnian |
Early Famennian |
Multiplicisphaeridium |
Multiplicisphaeridium ampliatum
|
Canada(Ontario) |
Early Emsian |
|
Multiplicisphaeridium |
Multiplicisphaeridium anastomose
|
Ohio |
Middle Famennian |
Late Famennian |
Multiplicisphaeridium |
Multiplicisphaeridium ancorum
|
Indiana |
Late Frasnian |
Early Famennian |
Multiplicisphaeridium |
Multiplicisphaeridium leptaleoderos
|
Oklahoma |
Late Gedinnian |
|