Type
Zone
Age range
247.6–247.4 Ma
Early Triassic
Olenekian
Triassospathodus sosioensis
Neospathodus triangularis
Icriospathodus collinsoni
247.60247.59247.58247.57247.56247.55247.54247.53247.52247.51247.50247.49247.48247.47247.46247.45247.44247.43247.42247.41247.40