Why is haplogroup U1 (mtDNA) absent in the pics/discussions?

[SverreS]

Hello!

Probably a silly newbie question, but I belong to the mtDNA U1 group. And I can't seem to find it on the Eupedia charts & figures.

Yours,
SverreS

[Rethel]

Because no one serious cares about mts.

[A. Papadimitriou]

As far as I understand it is that way because the frequency is extremely low
https://en.wikipedia.org/wiki/Haplogroup_U_(mtDNA)#Haplogroup_U1