Parent taxon: Neornithes according to B. C. Livezey and R. L. Zusi 2007
See also Bertelli et al. 2007, 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, Lindow and Dyke 2006, Mayr 2009, Meyer and Zardoya 2003, Slack et al. 2006 and Wetmore 1960
Sister taxa: Aequornithes, Cariamiformes, Cathartiformes, Eurypygiformes, Galbuliformes, Leptosomiformes, Lonchodytes pterygius, Mesitornithiformes, Odontognathae, Otidiformes, Palaeognathae, Phoenicopteriformes, Picocoraciae, Pterocliformes, Yacoraitichnus
Subtaxa: Alciformes Anas benedeni Anas creccoides Bucerotiformes Eurolimnornithiformes Galloanserae Gracilitarsidae Neoaves Odontoanserae Pelagornithidae Perplexicervix Vastanavis