Lophosphaeridium |
Lophosphaeridium ochthos
|
Ohio |
Givetian |
|
Lophosphaeridium |
Lophosphaeridium torus
|
Oklahoma |
Late Gedinnian |
|
Micrhystridium |
Micrhystridium adductum
|
Indiana |
Late Frasnian |
Early Famennian |
Micrhystridium |
Micrhystridium adductum
|
Ohio |
Middle Famennian |
Late Famennian |
Micrhystridium |
Micrhystridium albertense
|
Canada(Alberta) |
Frasnian |
|
Micrhystridium |
Micrhystridium alloiteauii
|
Canada(Ontario) |
Eifelian |
Givetian |
Micrhystridium |
Micrhystridium angustum
|
Canada(Alberta) |
Frasnian |
|
Micrhystridium |
Micrhystridium bistchoense
|
Canada(Alberta) |
Frasnian |
|
Micrhystridium |
Micrhystridium breviciliatum
|
Canada(Alberta) |
Frasnian |
|
Micrhystridium |
Micrhystridium complurispinosum
|
Ohio |
Middle Famennian |
Late Famennian |
Micrhystridium |
Micrhystridium coronatum
|
Indiana |
Late Frasnian |
Early Famennian |
Micrhystridium |
Micrhystridium crassiechinatum
|
Canada(Alberta) |
Frasnian |
|
Micrhystridium |
Micrhystridium duvernayense
|
Canada(Alberta) |
Frasnian |
|
Micrhystridium |
Micrhystridium echinosum
|
Canada(Alberta) |
Frasnian |
|
Micrhystridium |
Micrhystridium erugatum
|
Ohio |
Middle Famennian |
Late Famennian |
Micrhystridium |
Micrhystridium flexibile
|
Ohio |
Middle Famennian |
Late Famennian |
Micrhystridium |
Micrhystridium inusitatum
|
Ohio |
Middle Famennian |
Late Famennian |