Cygnus paloregonus

Cygnus paloregonus; Temporal range: Middle Pleistocene
	Left carpometacarpus from the hand of an extinct swan (Olor paloregonus = Cygnus paloregonus) from Oregon.[1] note on a a: pathological condition that consists in a more or less abundant exudation of spongy, osseous material that appeared upon the proximal part of the first or pollex metacarpal of the carpo-metacarpus
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Dinosauria
Class:	Aves
Order:	Anseriformes
Family:	Anatidae
Genus:	Cygnus
Species:	C. paloregonus
Binomial name
	Cygnus paloregonus; Cope, 1878[2]
Synonyms
	Anser condoni Schufeldt 1892[3][4]; Cygnus matthewi Schufeldt 1913[5]; Olor matthewi Schufeldt 1913[5]; Olor paloregonus (Cope)[3]; Sthenelides paloregonus[6];

Cygnus paloregonus is a fossil swan. It is an ancestor of, and distantly allied to, the mute swan. It is known from the Pleistocene from Fossil Lake, Oregon, Froman's Ferry, Idaho, and from Arizona. It is referred to by Hildegarde Howard in Delacour's The Waterfowl of the World as "probably the mute type swan".[7]

References

Notes On Paleopathology. R. W. Shufeldt, M. D., Popular Science Monthly, Volume 42, March 1893 (link retrieved 9 April 2016)
The Silver Lake of Oregon and its Region, E. D. Cope, The American Naturalist, Vol. 23, No. 275 (Nov., 1889), page 978 (Stable URL)
Review: Shufeldt on Fossil Birds from Oregon. Reviewed Work: A Study of the Fossil Avifauna of the Equus Beds of the Oregon Desert by R. W. Shufeldt. Review by: J. A. A., The Auk, Vol. 10, No. 4 (Oct., 1893), page 344, doi:10.2307/4067816
Brodkorb, Pierce (1964). "Catalogue of Fossil Birds: Part 2 (Anseriformes through Galliformes)". Bulletin of the Florida State Museum. 8 (3): 195–335.
Review of the Fossil Fauna of the Desert Region of Oregon, with a Description of additional Material collected there. R. W. Schufeldt. Bulletin of the American Museum of Natural History, VoL. XXXII, Aut, VI, pages 123-178, New York, 1913 (link retrieved 9 April 2016)
Cygnus paloregonus at the Paleobiology Database (retrieved 9 April 2016)
Delacour, Jean Théodore. The Waterfowl of the World. pp. 262–265.

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