Type
Zone
Age range
251.9–251.7 Ma
Early Triassic
Induan
Lopingian
Changhsingian
Neogondollela krystyni
Isarcicella isarcica
Hindeodus parvus
Clarkina zhejiangensis-Clarkina meishanensis
251.90251.89251.88251.87251.86251.85251.84251.83251.82251.81251.80251.79251.78251.77251.76251.75251.74251.73251.72251.71251.70