Examples from the Web for holarctic
In the second place, the line of migration seems to have been outward from the holarctic region.American Weasels|E. Raymond Hall
So on the whole, this region has not developed so rapidly as the Holarctic.
In our part of the Holarctic, that is, the Nearctic, the familiar birds about us do not nest also in the tropical regions.
But these distinctions should be and are retained in the divisions of the Holarctic.
There are no orders, and there seem to be no families which are found in the Holarctic and nowhere else.