Original sentence: The American lion (Panthera leo atrox) also known as the North American lion,  American cave lion, is an extinct feline known from fossils
Edited sentence: The American lion (Panthera leo atrox) also known as the North American lion,  American cave lion, is an extinct feline of the family Felidae, endemic to North America during the Pleistocene epoch (1.8 mya11,000 years ago), existing for approximately