Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
   Subclass †Enantiornithes Walker, 1981 see Infraclass Enantiornithes Walker, 1981
     Order †Boluochiformes Zhou & Zhang, 2006 see Order Longipterygiformes Zhang, Zhou, Hou & Gu, 2001
       1 Family †Boluochidae Zhou & Zhang, 2006 see Clade Longipterygidae Zhang, Zhou, Hou & Gu 2001 [O'Connor et al. 2009]