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Anseranatidae

Cladus: Eukaryota
Supergroup: Opisthokonta
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Superclassis: Tetrapoda
Classis: Aves
Subclassis: Carinatae
Infraclassis: Neornithes
Parvclassis: Neognathae
Ordo: Anseriformes
Familia: Anseranatidae
Genus: Anseranas

Name

Anseranatidae (Sclater, 1880)

Vernacular names
Internationalization
Dansk: Skadegås
Deutsch: Spaltfußgans
English: Magpie-goose
Français: Anséranatidés
Frysk: Spaltpoatguozzen
Lietuvių: Skeltapėdės žąsys

Anseranatidae, the magpie-geese, is a biological family of waterbirds. It is a unique member of the order Anseriformes. The only living species, the Magpie Goose, is a resident breeder in northern Australia and in southern New Guinea.

Systematics and evolution

This family is placed in the order Anseriformes, having the characteristic bill structure, but is considered to be distinct from the other families in this taxon. The related and extant families, Anhimidae (screamers) and Anatidae (ducks, geese and swans), contain all the other taxa.[1]

A cladistic study of the morphology of waterfowl found that the Magpie Goose was an early and distinctive offshoot, diverging after screamers and before all other ducks, geese and swans.[2]

This family is quite old, a living fossil, having apparently diverged before the Cretaceous–Paleogene mass extinction - the relative Vegavis iaai lived some 68-67 million years ago. The fossil record is limited, nonetheless. The enigmatic genus Anatalavis (Hornerstown Late Cretaceous or Early Paleocene of New Jersey, USA - London Clay Early Eocene of Walton-on-the-Naze, England) is sometimes considered to be the earliest known anseranatid. Other Paleogene birds sometimes considered magpie-geese are the genera Geranopsis from the Hordwell Formation Late Eocene to the Early Oligocene of England and Anserpica from the Late Oligocene of Billy-Créchy (France)[3]. The earliest known member of the group in Australia is an unnamed species represented by fossils found in the late Oligocene Carl Creek Limestone of Queensland. Additional fossils from North America and Europe suggest that the family was spread across the globe during the late Paleogene period.[4]

References

1. ^ Myers, P. et al. (2008)
2. ^ Livezey, Bradley C. (1986). "A phylogenetic analysis of recent anseriform genera using morphological characters." (Full text). Auk 103 (4): 737–754. http://elibrary.unm.edu/sora/Auk/v103n04/p0737-p0754.pdf.
3. ^ Hugueney, M. et al. (2003)
4. ^ Worthy, T.H. and Scanlon, J.D. (2009). "An Oligo-Miocene Magpie Goose (Aves: Anseranatidae) from Riversleigh, Northwestern Queensland, Australia." Journal of Vertebrate Paleontology, 29(1): 205-211. doi:10.1671/039.029.0103

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Source: Wikipedia, Wikispecies: All text is available under the terms of the GNU Free Documentation License