Type
Zone
Age range
358.4–357.4 Ma
Mississippian
Tournaisian
Siphonodella sandbergi-Siphonodella belkai
Siphonodella duplicata
Siphonodella sulcata
358.4358.4358.3358.3358.2358.1358.1358.1358.0357.9357.9357.9357.8357.8357.7357.6357.6357.6357.5357.4357.4