Type
Zone
Age range
384–383 Ma
Middle Devonian
Givetian
Mesotaxis guanwushanensis
Klapperina disparilis
Schmidtognathus hermanni
384.0383.9383.9383.9383.8383.8383.7383.6383.6383.6383.5383.4383.4383.4383.3383.3383.2383.1383.1383.1383.0