Type
Zone
Age range
383–381.2 Ma
Late Devonian
Frasnian
Middle Devonian
Givetian
Palmatolepis transitans
Mesotaxis guanwushanensis
Klapperina disparilis
383.0382.9382.8382.7382.6382.5382.4382.3382.2382.1382.0381.9381.8381.7381.6381.5381.4381.3381.2