Type
Subchron
Age range
164.15–164.05 Ma
Middle Jurassic
Callovian
M38n.1r
M38n.2n
M38n.2r
164.15164.15164.14164.13164.13164.13164.12164.12164.11164.10164.10164.09164.09164.09164.08164.07164.07164.06164.06164.06164.05