Hallowed Hippology - Equos toto orbe terrarum
Rock paintings are difficult to carbon date. Rock paintings in the Americas tended to be exposed to the elements and have sustained varying degrees of damage.
Identifying Ice Age Megafauna by visual appearance is somewhat controversial, but Iriarte et al (2022) propose that the archeological evidence of humans existing at the same time at the megafauna, the relative location of site with the correct pigments corresponding to late Pleistocene strata, and the naturalistic appeance being consistant with the fossil record serve as evidence that the animals depicted are indeed Ice Age megafauna.
Equus evolved in North American and dispersed to South American while Hippidion evolved in South America. The pictured animal has much in common with these precursors to the extant horse. (Janis and Bernor, 2019)
Equus ferus przewalskii
"Photo of reintroduced Przewalski's horse taken at the "Seer" release site, managed by the Association pour le cheval de Przewalski: TAKH, in the Khar Us Nuur National Park Buffer Zone. The mare in the photo is Bergeronette, born on 14 July 1998 at Le Villaret, France. In 2005, she was transported to the Seer release site in the Khomyn Tal region along with her one-year-old son, Boléro, as part of a group of ten reintroduced horses. Bergeronette lived a long life and was, for several years, the oldest known living Przewalski's horse in Khomyn Tal before her death in 2023."
https://la.wikipedia.org/wiki/Equus_przewalskii#cite_note-1
Photo Credit: By Claudia Feh - Opus proprium, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=40820924