Parent taxon: Neornithes according to B. C. Livezey and R. L. Zusi 2007
See also Bertelli et al. 2007, Bertelli et al. 2010, Bertelli et al. 2013, Carroll 1988, Chatterjee and Templin 2007, Clarke et al. 2007, Clarke et al. 2005, Fordyce and Thomas 2011, Gardiner 1982, Gauthier 1986, Ksepka and Clarke 2010, Kurochkin 2000, Lindow and Dyke 2006, Mayr 2009, Meyer and Zardoya 2003, Olson 1992, Slack et al. 2006, Wang and Mayr 2012, Wetmore 1940, Wetmore 1956 and Wetmore 1960
Sister taxa: Aequornithes, Alectromorphae, Cariamiformes, Cathartiformes, Colymbomorphae, Coraciomorphae, Eurypygiformes, Galbuliformes, Leptosomiformes, Lonchodytes pterygius, Mesitornithiformes, Odontognathae, Otidiformes, Palaeognathae, Pelargomorphae, Phoenicopteriformes, Picocoraciae, Pterocliformes
Subtaxa: Alciformes Anas benedeni Anas creccoides Caprimulgiformes Eurolimnornithiformes Gracilitarsidae Juncitarsus Neoaves Odontoanserae Pangalloanserae Passeriformes Perplexicervix Scandiavis Vastanavis