Figs 5−8
Yakovlev et al. 2020: 99−103.
Type locality: Russia, North-Eastern Yakutia, Momsky District, 70 km E of Khonuu village.
Distribution: Momsky Range (North-Eastern Yakutia).
The conspecificity of P. arcticus and P. ammosovi does not look completely convincing due to the fact that there is still no good comparative material from the type locality of P. arcticus. Also, the subspecies belonging of the specimen collected on Yablonovyi Pass in Magadan Territory (Gorbunov 2008) is not known.