Jurassic Fight Club



Panthera leo atrox
4 feet tall, 8.2 feet long, 775 pounds
Powerful jaws, strength, speed, sharp claws, scenes, hunting, agile, acrobatic, roar,sharp teeth, roar, stealth, intelligence
North America
Late Pleistocene 10,000 Ka
First appearance: "Ice Age Monsters" (only appearance)

Panthera Leo Atrox, also known as the American Lion, is an extinct lion of the family Felidae, endemic to North America and northwestern South America during the Pleistocene epoch (0.34 mya to 11,000 years ago), existing for approximately 0.33 million years.

In the episode "Ice Age Monsters", a bald male lion killed a steppe bison before Arctodus, the short-faced bear, arrives. Arctodus was swiped right on the face and this gives the chance for the American Lion to bite the bear's throat, but the lion was thrown into a huge hole and dies from the fall.


Panthera atrox, the North American lion of the Pleistocene Era, weighed in at about 775 pounds, stood 4 feet tall (1.22 meters), and measured 8.2 feet (2.5 meters) long; he was about 25 percent larger than the modern African lion. He was probably plain-colored, not spotted, and had large manes common to modern male lions (although some may have had small manes). Panthera had long legs, five retractable claws on each of its four feet and powerful teeth and jaws, with a bite force of more than 1,800 pounds per square inch (LBSPSI).

Fighting style[]

The mega lion's long legs were nonetheless not designed for long distance chase, and its strategy for stalking its prey was to use cover and camouflage to get close enough to attack successfully. Once it got close, the lion would run in and use its powerful jaws to subdue its prey. He/she would also rely on its speed and quick reflexes to outmaneuver larger opponents, such as the giant bear.


Evidence shows that Panthera was (like Arctodus, the giant bear) an apex predator, at the top of the food chain in its habitat. Males probably fought with Arctodus for food (such as bison, wild horses and other smaller animals) and for ultimate dominance of their range, in the harsh, rapidly changing climate of the Late Pleistocene era.


  • Though paleontologists have recovered several well-preserved specimens of Panthera from the tar pits at Rancho La Brea in Los Angeles, they were far less abundant than those of Smilodon fatalis, the saber-toothed lion. This relative shortage suggests that Panthera was probably more intelligent and evolved and able to avoid the tar traps that took the lives of so many Ice Age animals. (The top speed of Mega Lion is about 45-50 mph as fast as a modern day cougar.)
  • It says that Panthera Atrox was the biggest cat ever, however modern day tigers are bigger.