Type
Subchron
Age range
168.73–168.65 Ma
Middle Jurassic
Bajocian
M42n.2n
M42.2r
M42.3n
168.73168.72168.72168.72168.71168.71168.70168.69168.69168.69168.68168.68168.67168.66168.66168.66168.65