Order Cecomorphae Huxley 1867 (avialan)
Synonym: Pygopodes
Parent taxon: Euornithes according to O. P. Hay 1902
See also Shufeldt 1891
Sister taxa: Chenomorphae, Gallinae, Grallae, Herodii, Picariae
Subtaxa: Colymboidea
Ecology: ground dwelling carnivore