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en.wikipedia.org/wiki/American_cheetah

The American cheetah is either of two feline species of the extinct genus Miracinonyx, endemic to North America during the Pleistocene epoch (2.6 million to 12,000 years ago) and morphologically similar to the modern cheetah (Acinonyx jubatus). These cats were originally known from fragments of skeletons, but nearly complete skeletons have been recovered from Natural Trap Cave in northern Wyoming.

www.extinctanimals.org/american-cheetah.htm

American Cheetah is an extinct genus of two feline species that were endemic to North America. Their existence only came to be known from their skeleton samples. Species belonging to genus Miracinonyx were larger compared to modern Cheetah found in Africa. In fact, their size was similar to a cougar.

www.thoughtco.com/american-cheetah-miracinonyx-1093041

The American cheetah is an extinct genus of two feline species that were endemic to North America during the Pleistocene period, Miracinonyx inexpectatus and Miracinonyx intrumani. Researchers have pieced together fragments of an American cheetah skeleton to derive a picture of what these predators may have looked like.

www.answers.com/Q/Why_did_the_American_cheetah_go_extinct

Well it's not completely known why the American Cheetah went extinct. They likely died off with a large number of other North American animals (American Lions, Horses, Mammoths etc.) at the end of ...

blueline2011.wordpress.com/2011/12/03/extinct-animals

• The name “American cheetah” is often used to describe two extinct North American cats, the other being M. inexpectatus , which was a larger, and even more ancient species. In terms of appearance, this cat was halfway between the living cheetah and the living puma, and it may have been a more generalist predator than M. trumani.

www.livescience.com/51793-extinct-ice-age-megafauna.html

Extinct giants, such as the American cheetah and ground sloth, lived in North America until they mysteriously died out about 10,000 years ago.

animals.fandom.com/wiki/American_Cheetah

American Cheetah (Miracinonyx ) is an extinct genus of cheetahs. They lived in North America approximately 2.6 to 12,000 years ago. Although these cheetahs are only known from parts of skeletons that have been found, they were morphologically similar to modern cheetahs. American cheetahs were...

www.thoughtco.com/recently-extinct-tigers-and-lions-1092148

As with the American cheetah, the big-cat affiliations of the American lion (Panthera leo atrox) are in some doubt: This Pleistocene predator may actually have been more closely related to tigers and jaguars than to modern lions. The amazing thing about the American lion is that it coexisted and competed with both Smilodon (aka the saber-toothed tiger, below) and Canis dirus, also known as the ...

www.prehistoric-wildlife.com/species/m/miracinonyx.html

- The Plio-Pleistocene cheetah-like cat Miracinonyx inexpectatus of North America - Journal of Vertebrate Paleontology 10(4):434-454. - Blaire Van Valkenburgh, Frederick Grady & Björn Kurtén - 1990.-Evolution of the extinct Sabretooths and the American cheetah-like cat.