And in fact, the researchers may have a candidate: a species from Patagonia called Dusicyon avus, which went extinct 6,000 to 8,000 years ago.    From Wordnik.com.  [EurekAlert! - Breaking News] Reference

Pampas Fox (Dusicyon gymnocercus), Campus de Tuyei, Argentina.    From Wordnik.com.  [Humid Pampas] Reference

There was a native land mammal: the Warrah or Antarctic wolf Dusicyon australis, sadly hunted to extinction by 1876.    From Wordnik.com.  [Archive 2006-05-01] Reference

Other species present include the mara Dolichotis patagonum, Argentine grey fox Dusicyon griseus, culpeo fox D. culpaeus and Geoffroy's cat Felis geoffroyi.    From Wordnik.com.  [Península Valdés, Argentina] Reference

The puma (Puma concolor), a fox (Dusicyon culpaeus) and two camelids, vicugna (Vicugna vicugna) and guanaco (Lama guanicoe), are the largest native animals in the area and are relatively numerous in some parts of the ecoregion.    From Wordnik.com.  [Southern Andean steppe] Reference

In 1833 he arrived at the Falkland Islands, where he met and ‘collected’ specimens of the now extinct Falkland Island fox or Warrah Dusicyon australis (image at left by John Keulemans), and in September 1835 The Beagle reached the Galapagos Islands.    From Wordnik.com.  [Archive 2007-01-01] Reference

Dusicyon australis or Yamainu or Japanese wolf C. lupus hodophilax.    From Wordnik.com.  [ScienceBlogs Channel : Life Science] Reference

Some of the common animals include the pampas deer (Ozotoceros bezoarticus celer), the puma (Felis concolor), Geoffroy's cat (Felis geoffroyi), pampa fox (Dusicyon gymnocercus) and the zorrino común (Conepatus chinga).    From Wordnik.com.  [Semi-arid Pampas] Reference

The puma (Puma concolor), two foxes (Dusicyon griseus and D. culpaeus), guanaco (Lama guanicoe), huemul (Hippocamelus bisulcus), pudu pudú (Pudu pudu), and huillín (Lutra provocax) are the largest native animals in the area and are relatively abundant in some parts of the ecoregion.    From Wordnik.com.  [Magellanic subpolar forests] Reference

Among the fauna we find great herbivores such as the pampas deer (Ozotoceros bezoarticus celer) and the guanaco (Lama guanicoe), carnivores such as the puma (Felis concolor), Geoffroy's cat (Felis geoffroyi), pampa fox (Dusicyon gymnocercus), zorrino común (Conepatus chinga) and grison (Galictis cuja).    From Wordnik.com.  [Humid Pampas] Reference