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Hesperornithidae Marsh 1872 [Clarke 2004]<br />
> Hesperornis regalis ~ Bap<strong>to</strong>rnis advenus<br />
Carinatae Merrem 1813 [Carcraft 1986]<br />
> Neornithes ~ Hesperornis<br />
Gansuiformes Hou & Liu 1984 [converted clade name]<br />
> Gansus yumenensis ~ Passer domesticus, Hesperornis regalis, Ichthyornis anceps, Enantiornis<br />
leali<br />
Ichthyornithes Marsh 1873b [Clarke 2004]<br />
> YPM 1450 ~ Aves<br />
*Note: YPM 1450 is the holotype of Ichthyornis dispar<br />
Ichthyornithiformes Fürbringer 1888 [converted clade name]<br />
> Ichthyornis anceps ~ Hesperornis regalis, Gansus yumenensis, Passer domesticus<br />
Aves Linnaeus 1758 [Gauthier 1986]<br />
< Ratitae & Tinamidae & Neognathae<br />
Neornithes Gadow 1892 [Sereno 1998]<br />
< Struthio & Passer<br />
Galloanserae Sibley & al. 1988 [Gauthier & de Queiroz 2001]<br />
< Gallus gallus & Anser anser<br />
Anseriformes Wagler 1830 [converted clade name]<br />
> crown Anser anser ~ Gallus gallus, Passer domesticus<br />
*Note: crown extant as of the year 1830<br />
Ana<strong>to</strong>idea Leach 1820 [converted clade name]<br />
> Anser anser ~ Anseranas semipalmata<br />
Gaviiformes Wetmore & Miller 1926 [converted clade name]<br />
> crown Gavia immer ~ Podiceps cristatus, Passer domesticus<br />
*Note: crown extant as of the year 1926<br />
Charadriiformes Huxley 1867 [converted clade name]<br />
> crown Charadrius hiaticula ~ Passer domesticus<br />
*Note: crown extant as of the year 1867<br />
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