Parent taxon: Aves according to C. Acosta Hospitaleche et al. 2023
See also Carroll 1988, Cau and Arduini 2008, Chatterjee 2002, Chiappe and Calvo 1994, Gadow 1898, Hope 2002, Jaekel 1911, Kurochkin 2000, Livezey and Zusi 2007, Martin 1984, Naish et al. 2012, O'Connor and Zelenkov 2013, Sereno 1998, Sereno 1999, Thulborn 1975, Walker 1981, Wang et al. 2014, Wetmore 1940, Wetmore 1960 and You et al. 2006
Sister taxa: Accipitriformes, Alaripeda, Archaeornithipus, Archornithes, Aucornis, Avimimiformes, Avipedidae, Barrosopus, Bucerotiformes, Chaoyangornithidae, Charadriiformes, Climacarthrus, Dolichopterus, Dromiceiidae, Eoaves, Eociconia, Eopteryx, Eucavitaves, Eupterornis remensis, Eurhipidurae, Euryonotus, Falconiformes, Fontinalis, Gansuiformes, Gobioolithidae, Gruipeda, Gyeongsangornipes, Ibidopodia, Ignotornidae, Jeholornis, Jindongornipodidae, Jixiangornis, Koreanaornipodidae, Kuszholiidae, Liaoxiornithidae, Limiavipedidae, Loncornis, Longipennes, Manu, Metornithes, Micropodiformes, Minerva, Mirandornithes, Moguiornipes, Musophagiformes, Mystiornithiformes, Odontoglossae, Odontopterygiformes, Odontornithes, Omnivoropterygiformes, Onychopteryx, Pachycorioolithidae, Palaeoaves, Palaeolestes, Palaeopsittacus, Paludicolae, Pancharadriiformes, Pangalliformes, Panmirandornithes, Pansphenisciformes, Parvoolithus, Patagonichnornis, Paxavipedidae, Phaethontiformes, Platanavis, Plectophora, Praeornithes, Proherodius, Proherodius oweni, Proornis, Protoaviformes, Protopelargus, Protornis, Psittacopasseres, Psittacopedidae, Pygostylia, Qianshanornithidae, Querandiornis, Riacama, Sauriurae, Shandongornipodidae, Shenzhouraptor, Smiliornis, Tantalatos, Tantaleus, Tatarornipes, Telluraves, Telmatoformes, Teracus, Tricorynopus brinkmani, Tridentigerpes, Tshulia, Uhangrichnus, Yacoraitichnus, Yalavis
Subtaxa: Aequornithes Alectromorphae Cariamiformes Cathartiformes Colymbomorphae Coraciomorphae Eurypygiformes Galbuliformes Leptosomiformes Lonchodytes pterygius Mesitornithiformes Neognathae Odontognathae Otidiformes Palaeognathae Pelargomorphae Phoenicopteriformes Picocoraciae Pterocliformes