-Wooly rhinceros wasnt part of pleistocene north american ecosystems
-Moose is megafauna
-considering that Equus ferus was present in north america, and most, if not all (depends on whetever vicugna is ancestor, or just close relative of alpaca) camelids were domesticated, I wouldnt have...
genetic research showed that horse diversity in americas wasnt that high, some species turned to be Equus ferus, and we domesticated this one.. other species were part of Equus lineage as well, even the south american species..
Caribou might spread even bit more southwards, while pronghorn might form "mega-herds" on prairie (bisons were partly able to form them, because of extinction of other prairie ungulates). overally, cougar and wolf would loose significant part of their prey, so I expect dramatic decline in...
Coyotes and dogs are closely related species with same number of chromosomes. If there would be any hybrid between Canis and Lycaopex, it would be almost surely infertile..
Please do not confuse south american canids with "true foxes" just because of silly english terminology. Lycalopex closest relatives are canids of genus canis (wolves, jackals etc.). However, I doubt culpeo could interbreed with dogs, they have 2n=74 chromosomes.