Monodon monoceros Linnaeus, 1758 . Syst. Nat., 10th ed., 1:75.

TYPE LOCALITY: "Habitat in Oceano Septentrionali Americae, Europae." (= northern seas of Europe and America) .

DISTRIBUTION: Arctic Ocean; rarely in Beaufort, Chuckchi and East Siberian Seas; occasional strays as far south as the Newfoundland, the Netherlands, British Isles and Japan.

STATUS: CITES - Appendix II; IUCN - Insufficiently known.

SYNONYMS: microcephalus, monodon, narhval, vulgaris .

COMMENTS: Reviewed by Reeves and Tracey (1980, Mammalian Species, 127) and Hay and Mansfield (1989).