Aythya

Taxobox
name = "Aythya"

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image_width = 250px
image_caption = Canvasback ("Aythya valisineria")
regnum = Animalia
phylum = Chordata
classis = Aves
ordo = Anseriformes
familia = Anatidae
genus = "Aythya"
genus_authority = Boie, 1822
subdivision_ranks = Species
subdivision = See text.

"Aythya" is a genus of diving ducks.

pecies

*Canvasback "Aythya valisineria"
*Common Pochard "Aythya ferina"
*Redhead "Aythya americana"
*Ring-necked Duck "Aythya collaris"
*Hardhead "Aythya australis"
*Baer's Pochard "Aythya baeri"
*Ferruginous Duck "Aythya nyroca"
*Madagascar Pochard "Aythya innotata"
*New Zealand Scaup "Aythya novaeseelandiae"
*Tufted Duck "Aythya fuligula"
*Greater Scaup "Aythya marila"
*Lesser Scaup "Aythya affinis"

"Aythya shihuibas" was described from the Late Miocene of China. An undescribed prehistoric species is known only from Early Pleistocene fossil remains found at Dursunlu, Turkey [Louchart "et al." (1998)] ; it might however be referrable to a paleosubspecies of an extant species considering its age (see also Greater Scaup).

The Miocene Verify source|date=February 2008"Aythya" arvernensis" is now placed in "Mionetta", while "Aythya" chauvirae" seems to contain the remains of 2 species, at least one of which does not seem to be a diving duck. [Worthy "et al." (2007)]

References

* (1998): L'avifaune de Dursunlu, Turquie, Pléistocène inférieur: climat, environnement et biogéographie. "C. R. Acad. Sci. Paris IIA" 327(5): 341-346. [French with English abridged version] DOI|10.1016/S1251-8050(98)80053-0 (HTML abstract)
* (2007): Miocene waterfowl and other birds from central Otago, New Zealand. "J. Syst. Palaeontol." 5(1): 1-39. doi|10.1017/S1477201906001957 (HTML abstract)