Type
Zone
Age range
274.7–274.5 Ma
Cisuralian
Kungurian
Mesogondolella lamberti-Neostreptognathodus sulcoplicatus
Sweetognathus guizhouensis
Neostreptognathodus prayi
274.70274.69274.68274.67274.66274.65274.64274.63274.62274.61274.60274.59274.58274.57274.56274.55274.54274.53274.52274.51274.50