Type
Zone
Age range
238–237 Ma
Late Triassic
Carnian
Middle Triassic
Ladinian
Daxatina canadensis
Frankites sutherlandi
Macl. maclearni
238.0237.9237.9237.8237.8237.8237.7237.7237.6237.6237.5237.4237.4237.3237.3237.3237.2237.2237.1237.1237.0