Type
Zone
Age range
307–305.7 Ma
Pennsylvanian
Kasimovian
Moscovian
Idiognathodus sagittalis
Streptognathodus subexcelsus
Neoghanthodus round-Streptognathodus cancellosus
307.0306.9306.8306.7306.6306.5306.4306.3306.2306.1306.0305.9305.8305.7