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Pleistocene Big Cats
American Lion (Panthera atrox)
American Lion (Panthera atrox)
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American Lion (Panthera atrox)
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 (11-18-2018, 04:03 AM)GrizzlyClaws Wrote:Well，so 480MM Panthera atrox's skull muzzle would be the broadest one in all of the feline? The 475MM Panthera spalea's skull is a private specimen but recognized officially(11-18-2018, 03:56 AM)GuateGojira Wrote: You are right, the muzzle of the specimen is the largest of all the ones in the list.  (11-19-2018, 09:39 AM)Smilodon-Rex Wrote:(11-18-2018, 04:03 AM)GrizzlyClaws Wrote:Well，so 480MM Panthera atrox's skull muzzle would be the broadest one in all of the feline? The 475MM Panthera spalea's skull is a private specimen but recognized officially(11-18-2018, 03:56 AM)GuateGojira Wrote: You are right, the muzzle of the specimen is the largest of all the ones in the list. If it got the same proportion as the specimen 2900-3, then yes.  (11-18-2018, 08:23 PM)epaiva Wrote: Big Panthera atrox replica skull FASCINATING!!!  The skull is HUGE! Thanks for the picture @epaiva. (11-19-2018, 10:20 AM)GrizzlyClaws Wrote:(11-19-2018, 09:39 AM)Smilodon-Rex Wrote:(11-18-2018, 04:03 AM)GrizzlyClaws Wrote:Well，so 480MM Panthera atrox's skull muzzle would be the broadest one in all of the feline? The 475MM Panthera spalea's skull is a private specimen but recognized officially(11-18-2018, 03:56 AM)GuateGojira Wrote: You are right, the muzzle of the specimen is the largest of all the ones in the list.  *This image is copyright of its original author *This image is copyright of its original author *This image is copyright of its original author The Panthera atrox's skull specimen UF 9076 from Florida  *This image is copyright of its original author *This image is copyright of its original author *This image is copyright of its original author Here is the location where UF 9076 was discovered  *This image is copyright of its original author *This image is copyright of its original author *This image is copyright of its original author Panthera atrox's skull in Museum of Florida UF9076–A Complete Skull and Jaws of a Giant Lion (Panthera atrox) Found in the Ichetucknee River, Florida A little over 50 years ago, a lucky fossil hunter found the complete skull and jaws of a giant lion in the Ichetucknee River. This remarkable specimen was missing just a few teeth. One can imagine how exciting the moment of discovery was for the person who found it. This particular skull is from a large male lion, and it is larger than almost every lion skull ever excavated from the La Brea Tar Pits in California. The specimen belongs to the University of Florida Museum of Natural History, and the catalogue number is UF9076. *This image is copyright of its original author *This image is copyright of its original author *This image is copyright of its original author Location of Ichetucknee Spring State Park. The Ichetucknee River flows through this state park into the Santa Fe River where giant lion specimens have also been found. https://markgelbart.wordpress.com/2016/0...r-florida/ The website link, let us check this: “Since the discovery of UF9076, specimens of Panthera atrox have been discovered at 20 other sites in Florida including the Santa Fe River, Vero Beach, the Gulf of Mexico (parts of which were above sea level during Ice Ages), Monkey Jungle Hammock, Cutler Hammock, St. Petersburg, Peace River, Lecanto, Waccasassa River, and Steinhatchee. These are scattered throughout the state. The jaw fragment with 2 attached teeth of a Pantheraatrox was also found at Edisto Beach, South Carolina. (From measurements of the teeth, trained paleontologists determined it was from a small female lion. The size slightly exceeds that of the largest jaguar distinguishing it from that species. I’m not 100 % confident in this diagnosis, but I’ll defer to the experts.) The presence of Panthera atrox at all of these sites indicates it occurred throughout southeastern North America during the late Pleistocene.”  *This image is copyright of its original author The Panthera atrox's ulna bone  *This image is copyright of its original author
 *This image is copyright of its original author Three American lions hunting long-horn bison（Bison latiforns）
Here is the complete record of the Florida P. atrox skull:
The Pleistocene Felidae of Florida It measures 404 mm in length, which would be on the small side for the males of Rancho La Brea.  *This image is copyright of its original author
(12-09-2018, 10:30 AM)tigerluver Wrote: Here is the complete record of the Florida P. atrox skull:404 mm skull individual may probably up to 250kg body-weight I think (11-19-2018, 10:20 AM)GrizzlyClaws Wrote:Grizzlyclaws, are you in USA but not in Canada right now?(11-19-2018, 09:39 AM)Smilodon-Rex Wrote:(11-18-2018, 04:03 AM)GrizzlyClaws Wrote:Well，so 480MM Panthera atrox's skull muzzle would be the broadest one in all of the feline? The 475MM Panthera spalea's skull is a private specimen but recognized officially(11-18-2018, 03:56 AM)GuateGojira Wrote: You are right, the muzzle of the specimen is the largest of all the ones in the list. (12-09-2018, 05:53 PM)Smilodon-Rex Wrote:(11-19-2018, 10:20 AM)GrizzlyClaws Wrote:Grizzlyclaws, are you in USA but not in Canada right now?(11-19-2018, 09:39 AM)Smilodon-Rex Wrote:(11-18-2018, 04:03 AM)GrizzlyClaws Wrote:Well，so 480MM Panthera atrox's skull muzzle would be the broadest one in all of the feline? The 475MM Panthera spalea's skull is a private specimen but recognized officially(11-18-2018, 03:56 AM)GuateGojira Wrote: You are right, the muzzle of the specimen is the largest of all the ones in the list. I think the flag display seldomly got some glitch, but soon it will revert back to normal.  *This image is copyright of its original author  *This image is copyright of its original author The size comparison between American lion and Smilodon fatalis in Museum of La Bera tip  *This image is copyright of its original author Bones of the American lion have been found in several locations in New Mexico. NPS Photo You have probably heard about African lions, but did you know lions once lived around the world? During the Pleistocene epoch (the last ice age), lions lived in Africa, Europe, Asia, and North America, giving them one of the largest ranges of any mammal! The lions that lived in North America were called American lions. For paleontologists, these lions are a source of debate; their taxonomy (classification) and how they are related to other big cats is uncertain. On one side, some paleontologists classify American lions as a distinct species, Panthera atrox. They say American lions are not lions at all and are instead more closely related to jaguars or tigers. Other paleontologists disagree. They classify American lions as a subspecies of lion, called Panthera leo atrox. They say American lions are related to other Pleistocene lions, like the cave lions in Europe and Asia. Recently, a genetics study supported the second idea, suggesting that American lions evolved from Eurasian cave lions that crossed the Beringia land bridge into North America. Even so, not everyone is convinced, and the debate about how exactly American lions are related to other big cats continues. Although the exact classification of the American lion is unclear, the atrox part of its scientific name stays the same. This word means “cruel” or “frightful” in Latin, and from what we can tell, this certainly describes American lions! Standing at almost four feet (1.2 m) tall at the shoulder, almost eight feet (2.5 m) long, and over 500 pounds (230 kg) in weight, American lions were bigger than modern lions. They had long, slender legs with retractable claws, and they could roar. Although it is not certain if American lions had manes or not, their large size and bulk, sharp teeth and claws, and long legs would have made them a frightful sight indeed. These long legs would have made American lions formidable hunters as well, similar to modern lions. Long legs would have allowed American lions to sprint very fast, possibly up to 30 miles (almost 50 km) per hour! However, it is probable that they could not sprint for long periods of time and had to rely on ambushes. Being a carnivore, American lions would have probably hunted various other Pleistocene animals, such as horses, deer, camels, ground sloths, young mammoths, and bison. They might have hunted and lived alone or in small prides, kind of like modern lions. Whether the American lion hunted by itself or in groups, it must have been successful. During their time walking the earth, American lions walked themselves all across North America. Fossils have been found from Canada to as far south as Chiapas, Mexico. With this range, American lions likely made it to the Tularosa Basin in New Mexico, which is today home to White Sands National Monument. If American lions did come here, they would have found a giant lake called Lake Otero instead of sand dunes. Thanks to the footprints we’ve found at the monument, we know Pleistocene animals like mammoths, camels, and ground sloths roamed around Lake Otero. So, perhaps American lions also came through as they hunted these large prey animals. Fossils elsewhere in the state show they were in the area; besides the tracks at White Sands, bones of the American lion have been found near Jal, Lea County; Isleta Cave, San Bernalillo County; and Muskox Cave, Eddy County, all in New Mexico. American lions roamed across North America for thousands of years. Around 10,000 years ago, however, they went extinct, alongside a lot of other Pleistocene megafauna. The exact reasons are unknown. Their extinction may have been due to human interference (humans hunting the prey American lions relied on), climate change, or both. Whatever the cause, the reign of the lions in North America came to an end. Today, these animals are still studied and imagined through the clues they left behind. https://www.nps.gov/whsa/learn/nature/american-lions.htm Here is the website link  *This image is copyright of its original author  *This image is copyright of its original author
 
@epaiva, @Smilodon-Rex @Tigerlover @GuateGojira : happy new year !!! In advance I welcome your future posts !
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