Anseranatidae
| Magpie Geese Temporal range: Eocene-Recent, 35–0 Ma possible Late Cretaceous record |
|
|---|---|
 |
|
| Modern Magpie Goose, Anseranas semipalmata | |
Scientific classification  |
|
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Superorder: | Galloanserae |
| Order: | Anseriformes |
| clade: | Anseres |
| Family: | Anseranatidae Sclater, 1880 |
| Genera | |
|
see text |
|
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.
[edit] 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]
[edit] References
- ^ Myers, P. et al. (2008)
- ^ 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.
- ^ Hugueney, M. et al. (2003)
- ^ 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
 |
This Anseriformes article is a stub. You can help Wikipedia by expanding it. |
