Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758 Subclass †Enantiornithes Walker, 1981 see Infraclass Enantiornithes Walker, 1981 Order †Protopterygiformes Zhou & Zhang, 2006 Family †Protopterygidae Zhou & Zhang, 2006 ?Genus †Vescornis Zhang et al., 2004 1 †Vescornis hebeiensis Zhang et al., 2004