If, at this point, you’re wondering where mammals like mustelids, seals, bears, etc. The evolutionary history of the dog family is still not completely resolved (and may never be, as new fossil finds and molecular techniques offer new insights), but the following is a generally accepted hypothesis.Readers interested in a more detailed appraisal of dog evolution are directed to Xiaoming Wang and Richard Tedford’s authoritative account in their 2008 book and I recommend the reader visits Wiki Pedia and The Searching Wolf.When the ice melted the Holarctic clade spread south and east, while the Nearctic clade spread north, the two meeting in central Canada.
Recent genetic work by Keith Aubry and his colleagues at the Pacific Northwest Research Station in Washington, however, has revealed new information on the spread of the Red fox in North America.Aubry’s data suggest that this species first reached North America during the Illinoian glaciation that lasted from roughly 300,000 to 130,000 years ago; during the next 30,000 years (the Sangamon interglacial period) the foxes spread south from Alaska, across what is now the contiguous USA.A couple of million years later the dogs started arriving in Eurasia, and the Pliocene (4-5 mya) saw the dogs spread into Africa and South America.Around six mya, the first wolf-like dog arrived in western Europe.In their 1982 comparison of Red and Arctic ( comes from the Old World and dates to the early Pleistocene (between 1.8 and 1 mya) of Hungary and, in her 2008 study of Red fox dentition, Polish Academy of Sciences mammalogist Elwira Szuma suggested that the current line evolved either in Asia Minor or North Africa around this time.
As fox populations rose in Eurasia, those in North America appear to have dwindled.
Fox domestication Living with the wild: interacting with wild foxes Interaction with other Species Small and Medium-sized Mammals Livestock Gamebirds Arctic Foxes and other Carnivores Deer Native Animals in Australia Plants and Invertebrates Questions and Answers Evolution and Early Distribution: Dogs and cats are Carnivorans, that is, they’re members of the taxonomic order Carnivora (note this is different to simply being a carnivore, or meat-eater, which is not a taxonomic grouping), which is one of 29 orders within the class Mammalia.
The evolution of carnivorans appears to have been a gradual process that happened in both North America and Eurasia, making it difficult to infer when it all started.
This radiation was probably in response to a vacant niche opening up as the borophagines started to die-out, and not only marked the birth of all the dog species we know today but also heralded the appearance of three modern-day genera in the south-western USA: (true foxes).
In essence, it was around 10 mya that the fox lineage split from the wolf-dog lineage.
There is then something of a hiatus in the vulpine fossil record until the early Pliocene (about 4 mya), with foxes from China and Turkey among the earliest Eurasian specimens.