Type
Subchron
Age range
166.31–166.23 Ma
Middle Jurassic
Bathonian
M39n.3r
M39n.4n
M39n.4r
166.31166.31166.30166.29166.29166.28166.28166.28166.27166.26166.26166.25166.25166.25166.24166.24166.23