page_title: Anseriformes
section_title: Systematics
hierarchical_section_title: Anseriformes / Taxonomy / Systematics
caption_attribution_description: Nederlands: Vogels, afbeeldingen door Jan van Oort voor Het Vogeljaar door Jac. P. Thijsse. Vogels: Tafeleend, Wintertaling, Krooneend, allen behoren tot de familie Anatidae, de eendachtigen English: Common pochard, Eurasian teal, Red-crested pochard, Family of Anatidae
context_page_description: Anseriformes is an order of birds that comprise about 180 living species in three families: Anhimidae, Anseranatidae, and Anatidae, the largest family, which includes over 170 species of waterfowl, among them the ducks, geese, and swans. Most modern species in the order are highly adapted for an aquatic existence at the water surface. With the exception of screamers, all have phalli, a trait that has been lost in the Neoaves. Due to their aquatic nature, most species are web-footed.
context_section_description: Anatidae systematics, especially regarding placement of some "odd" genera in the dabbling ducks or shelducks, is not fully resolved. See the Anatidae article for more information, and for alternate taxonomic approaches. Anatidae is traditionally divided into subfamilies Anatinae and Anserinae. The Anatinae consists of tribes Anatini, Aythyini, Mergini and Tadornini. The higher-order classification below follows a phylogenetic analysis performed by Mikko's Phylogeny Archive and John Boyd's website.
  Order Anseriformes
   ?†Conflicto Claudia P. Tambussi et al. 2019
  †Naranbulagornis Zelenkov 2019
  Suborder Anhimae Wetmore & Miller 1926
  Genus †Chaunoides de Alvarenga 1999
  Family Anhimidae Stejneger 1885 (screamers)
  Genus Anhima (Linnaeus 1766) Brisson 1760 [Anhima minuta; Palamedea cornuta Linnaeus 1766] (Horned screamer)
  Genus Chauna Illiger 1811
  Suborder Anseres (true anseriformes)
  Superfamily Anseranatoidea
  Family Anseranatidae Sclater 1880
  Genus †Anserpica Mourer-Chauviré, Berthet & Hugueney 2004
  Genus †Eoanseranas Worthy & Scanlon 2009 (Hand's dawn magpie goose)
  Genus †Anatalavis Olson & Parris 1987 [Nettapterornis Mlikovsky 2002; Telmatornis Shufeldt 1915] (Late Cretaceous/Early Paleocene – Early Eocene)
  Genus Anseranas (Latham 1798) Lesson 1828 [Chenogeranus Brown 1842; Choristopus Eyton 1838] (Magpie goose)
  Superfamily Anatoidea
  Family †Presbyornithidae Wetmore 1926 (wading-"geese")
  Genus †Teviornis Kuročkin, Dyke & Karhu 2002
  Genus †Telmabates Howard 1955
  Genus †Headonornis (Lydekker 1891) Harrison & Walker 1976 [Agnopterus hantoniensis Lydekker 1891; Ptenornis Seeley 1866; ?Presbyornis isoni (Dyke 2001)]
  Genus †Presbyornis Wetmore 1926 [Nautilornis Wetmore 1926; Coltonia Hardy 1959]
  Genus †Wilaru Boles et al. 2013
  Family †Paranyrocidae Miller & Compton 1939
  Genus †Paranyroca Miller & Compton 1939 (Rosebud Early Miocene of Bennett County, USA) 
  Family Anatidae Leach 1820 (almost 150 species)
  Subfamily †Romainvilliinae Lambrecht 1933
  Genus †Romainvillia Lebedinský 1927 (Late Eocene/Early Oligocene)
  Genus †Saintandrea Mayr & De Pietri 2013
  Subfamily Dendrocygninae Reichenbach 1849–50
  Genus Dendrocygna Swainson 1837 (whistling ducks)
  Genus Thalassornis Eyton 1838 (White-backed duck)
  Subfamily †Dendrocheninae Livezey & Martin 1988
  Genus †Dendrochen Miller 1944
  Genus †Manuherikia Worthy et al. 2007
  Genus †Mionetta Livezey & Martin 1988
  Subfamily Stictonettinae
  Genus Stictonetta (Gould 1841) Reichenbach 1853 (Freckled duck)
  Subfamily Anserinae Vigors 1825 sensu Livezey 1996 (swans and geese)
  Genus †Anserobranta Kuročkin & Ganya 1972
  Genus †Asiavis Nesov 1986
  Genus †“Chenopis” De Vis 1905
  Genus †Cygnavus Lambrecht 1931
  Genus †Cygnopterus Lambrecht 1931
  Genus †Eremochen Brodkorb 1961
  Genus †Megalodytes Howard 1992
  Genus †Paracygnus Short 1969
  Genus †Presbychen Wetmore 1930
  Genus †Cnemiornis Owen 1866 (New Zealand Geese)
  Genus Coscoroba (Molina 1782) Reichenbach 1853 [Pseudolor Gray 1855] (Coscoroba swan)
  Genus Cereopsis Latham 1801 (Cape Barren goose)
  Genus Cygnus Garsault 1764 [Archaeocygnus De Vis 1905; Cygnanser Kretzoi 1957; Euolor Mathews & Iredale 1917; Palaeocygnus Oberholser 1908; Chenopis Wagler 1832]
  Genus †Afrocygnus chauvireae Louchart et al. 2005
  Genus Branta Scopoli 1769 [Brenthus Sundeval l1872 non Schoenherr 1826; Bernicla Oken 1817; Geochen Wetmore 1943; Nesochen Salvadori 1895]
  Tribe Anserini Vigors 1825
  Genus Anser Brisson 1760 [Chen Boie 1822; Chionochen Reichenbach 1852; Exanthemops Elliot 1868; Cygnopsis Brandt 1836; Eulabeia Reichenbach 1852; Philacte Bannister 1870; Heterochen Short 1970; Marilochen Reichenbach 1852]
  Subfamily Tadorninae Reichenbach 1849–50 (shelducks and sheldgeese)
  Genus †Australotadorna Worthy 2009
  Genus †Brantadorna Howard 1964
  Genus †Centrornis Andrews 1897 (Malagasy sheldgoose)
  Genus †Miotadorna Worthy et al. 2007 (St. Bathans shelduck)
  Genus †Nannonetta Campbell 1979
  Genus †Pleistoanser Agnolín 2006
  Genus Plectropterus (Linnaeus 1766)  (Spur-winged goose)
  Genus Merganetta Gould 1842 (Torrent duck)
  Genus Chloephaga Eyton 1838 [Foetopterus Moreno & Mercerat 1891]
  Genus Neochen Oberh
caption: Anatidae
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