Type
Zone
Age range
323.4–322.5 Ma
Pennsylvanian
Bashkirian
Mississippian
Serpukhovian
Idiognathoides sinuatus
Declinognathodus noduliferus
Gnathodus postbilineatus
323.4323.4323.3323.3323.2323.1323.1323.1323.0322.9322.9322.9322.8322.8322.7322.6322.6322.6322.5