Type
Zone
Age range
237–236.5 Ma
Late Triassic
Carnian
Middle Triassic
Ladinian
Metapolygnathus tadpole
Metapolygnathus intermedius
Paragondolella inclinata
237.02237.00236.98236.96236.94236.92236.90236.88236.86236.84236.82236.80236.78236.76236.74236.72236.70236.68236.66236.64236.62236.60236.58236.56236.54236.52236.50236.48