Subclass Avialae Gauthier, 1986
see Clade Avialae Gauthier 1986
Infraclass Aves Linnaeus, 1758
see Subclass Aves Linnaeus, 1758
Parvclass Neornithes Gadow, 1893
see Subclass Neornithes Gadow, 1893
Cohort Neognathae Pycraft, 1900
Subcohort Neoaves Sibley et al., 1988
Division Natatores Baird, 1858
Subdivision Pygopodo-tubinares B.C. Livezey & R.L. Zusi, 2007
Superorder Gaviomorphae B.C. Livezey & R.L. Zusi, 2007
Order Gaviiformes Wetmore & Miller, 1926
1 Family Gaviidae Allen, 1897 - divers