Apologies for a road kill, but this may be of interest. It appears it may be Pantanal Cat or Brazilian Pampas Cat, Leopardus braccatus, looking at the pampas cat group split. The location isn't exact, but quite close. We blew it off as a cougar kitten and I only ran across the picture today and made an effort to ID it. It was a roadside picnic lunch stop going from Catamayo to the Jurupe Reserve. I'll appreciate input!