Definition of "holarctic"

It is also pertinent to note that the current obvious decline in work on holarctic hepatics most surely reflects a current obsession with cataloging and with nomenclature of the organisms—as divorced from their study as living entities.

1992, Rudolf M[athias] Schuster, The Hepaticae and Anthocerotae of North America: East of the Hundredth Meridian, volume V, New York, N.Y.: Columbia University Press, page ix