†family Paranyrocidae Miller and Compton 1939 (waterfowl)
Full reference: A. H. Miller and L. V. Compton. 1939. Two fossil birds from the Lower Miocene of South Dakota. The Condor 41(4):153-156
Parent taxon: Anseriformes according to A. H. Miller and L. V. Compton 1939
Sister taxa: Anhimae, Anseres, Palaeopapia, Petropluvialis, Romainvillia
Subtaxa: Paranyroca
Ecology: volant herbivore