Type
Subchron
Age range
164.43–164.32 Ma
Middle Jurassic
Callovian
M38n.3n
M38n.3r
M38n.4n
164.43164.43164.42164.41164.41164.41164.40164.40164.39164.38164.38164.38164.37164.37164.36164.35164.35164.34164.34164.34164.33164.32164.32