Type
Zone
Age range
312.5–310.8 Ma
Pennsylvanian
Moscovian
Neoghanthodus medexultimus-Streptognathodus-concinnus
Streptognathodus dissectus
Neognathodus uralicus
312.5312.4312.3312.2312.1312.0311.9311.8311.7311.6311.5311.4311.3311.2311.1311.0310.9310.8