Phylum Chordata Bateson, 1885 - chordates
Class Aves Linnaeus, 1758 - birds
see Subclass Aves Linnaeus, 1758
Subclass Neornithes Gadow, 1893
see Clade Neornithes Gadow, 1893
Superorder Neognathae Pycraft, 1900
see Cohort Neognathae Pycraft, 1900
Order Gaviiformes Wetmore & Miller, 1926
Family Gaviidae Allen, 1897 - divers
Genus Gavia Forster, 1788
Gavia arctica (Linnaeus, 1758) - black-throated diver