Protoleiosphaeridium |
Protoleiosphaeridium major
|
Canada(Alberta) |
Frasnian |
|
Protoleiosphaeridium |
Protoleiosphaeridium microgranifer
|
Canada(Alberta) |
Frasnian |
|
Protoleiosphaeridium |
Protoleiosphaeridium microsaetosum
|
Canada(Alberta) |
Givetian |
Famennian |
Protoleiosphaeridium |
Protoleiosphaeridium microsaetosum
|
Canada(NWT) |
Givetian |
Famennian |
Protoleiosphaeridium |
Protoleiosphaeridium microsaetosum
|
Canada(Saskatchewan) |
Givetian |
Famennian |
Protoleiosphaeridium |
Protoleiosphaeridium microsaetosum
|
Canada(Alberta) |
Frasnian |
Famennian |
Protoleiosphaeridium |
Protoleiosphaeridium microsaetosum
|
Canada(Saskatchewan) |
Frasnian |
Famennian |
Protoleiosphaeridium |
Protoleiosphaeridium minutum
|
Canada(Alberta) |
Frasnian |
|
Protoleiosphaeridium |
Protoleiosphaeridium orbiculatum
|
Canada(Alberta) |
Frasnian |
Famennian |
Protoleiosphaeridium |
Protoleiosphaeridium orbiculatum
|
Canada(Saskatchewan) |
Frasnian |
Famennian |
Protoleiosphaeridium |
Protoleiosphaeridium orbiculatum
|
Canada(NWT) |
Frasnian |
Famennian |
Protoleiosphaeridium |
Protoleiosphaeridium papillatum
|
Canada(Alberta) |
Frasnian |
|
Protoleiosphaeridium |
Protoleiosphaeridium parvigranulosum
|
Canada(Alberta) |
Frasnian |
|
Pterospermella |
Pterospermella atekmarta
|
Oklahoma |
Late Gedinnian |
|
Pterospermella |
Pterospermella capitana
|
Ohio |
Middle Famennian |
Late Famennian |
Pterospermella |
Pterospermella cerebella
|
Oklahoma |
Late Gedinnian |
|
Pterospermella |
Pterospermella circumstriata
|
Oklahoma |
Late Gedinnian |
|