Full reference: Z. Zhou and F. Zhang. 2006. Mesozoic birds of China—a synoptic review. Vertebrata PalAsiatica 44(1):60-98
Parent taxon: Enantiornithes according to Z. Zhou and F. Zhang 2006
Sister taxa: Aberratiodontuidae, Alexornithiformes, Avimaia, Avisauridae, Bohaiornithidae, Boluochiformes, Brevirostruavis, Castignovolucris, Cathayornis, Cathayornis aberransis, Cathayornis chabuensis, Cathayornithiformes, Concornis, Cruralispennia, Dunhuangia, Elektorornis, Elsornis, Enantiornithiformes, Eoalulavis, Eocathayornis, Eoenantiornis, Eoenantiornithiformes, Euenantiornithes, Euornithiformes, Evgenavis, Falcatakely, Feitianius, Flexomornis, Fortipesavis, Fortunguavis, Gobipipus, Gobipteryx, Gretcheniao, Holbotia, Houornis, Huoshanornis, Iberomesornis, Imparavis, Junornis, Lectavis, Linyiornis, Longipterygidae, Longipterygiformes, Longirostravisiformes, Microenantiornis, Mirusavis, Monoenantiornis, Musivavis, Navaornis, Noguerornis, Orienantius, Otogornis, Paraprotopteryx, Parvavis, Pengornithidae, Piscivorenantiornis, Protopteryx, Pterygornis, Qiliania, Shangyang, Sinornis, Vescornis, Xiangornis, Yatenavis, Yuanjiawaornis, Yungavolucris, Yuornis
Subtaxa: Protopterygidae
Ecology: ground dwelling carnivore
Distribution: there are no occurrences of Protopterygiformes in the database