Type
Epoch
Age range
323.4–298.9 Ma
Paleozoic
Permian
Cisuralian
Asselian
Carboniferous
Pennsylvanian
Gzhelian
Kasimovian
Moscovian
Bashkirian
Mississippian
Serpukhovian
324323322321320319318317316315314313312311310309308307306305304303302301300299298