Type
Chron
Age range
137.94–136.87 Ma
Early Cretaceous
Valanginian
Berriasian
M11A
M12
M12A
137.9137.9137.8137.8137.8137.7137.7137.6137.6137.5137.4137.4137.3137.3137.3137.2137.2137.1137.1137.0136.9136.9136.8