[cmrdporcupine]

It's pretty dubious because horses themselves -- the kinds of horses we domesticated and ride -- are descendants from a pretty isolated genetic pocket in the Pontic-Caspian steppe, potentially all descended from a single male even.

The kind of horse that could be domesticated and ridden was not widespread, and in fact were really just hunted for meat until maybe 6500 years ago, and actually riding them came even later...

So, I mean, maybe there were equine species in North America, but their relationship to humans I doubt would be anything like what we think of horses like right now. More like a hunted species like bison or deer...

Now, dromedaries I can see. Camels, alpacas, and llamas etc. Long and ancient history with those, and in both hemispheres independently.

[7thaccount]

Camels are crazy and work well in both cold and hot climates. I saw something (I think a PBS documentary) that said they originally weren't adapted to the desert, but the artic of northern Canada or something crazy like that (many many millenia ago).

Edit: more like millions of years

https://en.m.wikipedia.org/wiki/Paracamelus

[MrRolleyes]

There was, in fact, an american horse that died out that we likely hunted (or at least coexisted with). There is zero evidence of domestication of which I'm aware, though.