Adjective
holarctic (not comparable)
(biology) Distributed in a geographic range around the North Pole; restricted to Arctic regions.
The Holarctic has four endemic families: divers (Gaviidae), grouse (Tetraoninae), auks (Alcidae), and the waxwings (Bombycillidae). Source: Internet
However, the most currently accepted taxonomy recognizes either the two continental subspecies or recognize G. gulo as a single Holarctic taxon. Source: Internet