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Post by brobear on Apr 1, 2017 20:31:42 GMT -5
By Polar..... And in some studies, Agriotherium is considered as a form of short-faced bear. However, I must disagree (even though most information in these studies are correct) due to Agriotherium's habits. It was proven to be much more of a hunter than the other short-faced bears. It had a body lower to the ground and a quite robust chest (much like the brown bear), unlike the opposing traits of the other short-faced bears which favor endurance and scavenging. It must have definitely been a much more active hunter than the short-faced bears as well.
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Post by brobear on Mar 27, 2018 4:15:21 GMT -5
By Polar..... And in some studies, Agriotherium is considered as a form of short-faced bear. However, I must disagree (even though most information in these studies are correct) due to Agriotherium's habits. It was proven to be much more of a hunter than the other short-faced bears. It had a body lower to the ground and a quite robust chest (much like the brown bear), unlike the opposing traits of the other short-faced bears which favor endurance and scavenging. It must have definitely been a much more active hunter than the short-faced bears as well. According to several bear evolution "family trees" I have looked at, Agriotherium was more closely related to the panda bear lineage than to the short-faced bears. I will add that I believe ( opinion ) that the short-faced bears are closer to the panda bear lineage than to the genus Ursus.
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Post by brobear on Apr 2, 2018 18:00:38 GMT -5
*Note: Just as with Arctotherium and Arctodus, Agriotherium was very likely an omnivore which leaned heavily towards a carnivorous meat diet and was more scavenger than predator.
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Post by brobear on Mar 6, 2019 17:59:53 GMT -5
shaggygod.proboards.com/ Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Carnivora Family: Ursidae Subfamily: Ursinae Genus: Agriotherium Agriotherium was a genus of bears that lived during the Miocene (23.03 - 5.33 million years ago) and Pliocene (5.33 million - 1.8 million years ago)periods. [Note - Wagner named the genus in 1837.] These bears were extremely wide ranging. They inhabited Africa, Europe, Asia, and North America. Fossils of them have been found in the U.S.A., Mexico, China, Ethiopia, South Africa, India, Spain, France, Poland, and the Ukraine. There were several species; one was Agriotherium africanum. It entered Africa from Eurasia about 6 million years ago and spread all over the continent. Fossil remains of 36 specimens were found in the PPM bed in the Varswater Formation at Lang E. Quarry in South Africa. They date to the Pliocene. Fossils of Agriotherium have been discovered in several states in the U.S.A. For example, remains of Agriotherium sp. were found at Lost Quarry in Wallace County, Kansas. They date to the Miocene. The age estimate is 8.4 - 7.6 million years ago (AEO). Other Agriotherium sp. fossils have been unearthed in Arizona, California, Nevada, Nebraska, and Texas. Remains of Agriotherium schneideri were found in Florida and Mexico. Agriotherium was about 2 m. (6.56 feet) long. It was an efficient hunter, but was probably omnivorous. Species: Agriotherium africanum A. sivalensis A. schneideri A. inexpectans A. sp. Source: Paleobiology Database.
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Post by brobear on Mar 7, 2019 1:46:20 GMT -5
Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Carnivora Family: Ursidae Subfamily: Ursinae Genus: Agriotherium
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Post by brobear on Nov 14, 2019 9:55:41 GMT -5
The Bear Almanac - Second Edition:
Agriotherium - A rare fossil mammal, found in Eurasia and North America. Larger and more massive than Arctotherium, it was short faced and had massive limbs. Agriotherium was extinct in most areas before the Pliocene Epoch.
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Post by King Kodiak on Nov 14, 2019 20:20:12 GMT -5
The Agriotherium genus had huge bears, Africanus was huge and it is known to have the strongest bite force of any bear in history. But why does it say it was larger than Arctotherium? It was not.
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Post by brobear on Nov 15, 2019 1:32:38 GMT -5
The Agriotherium genus had huge bears, Africanus was huge and it is known to have the strongest bite force of any bear in history. But why does it say it was larger than Arctotherium? It was not.
But why does it say it was larger than Arctotherium? The Bear Almanacs get their information of old sources. Before the discovery of Arctotherium angustidens, Agriotherium Africanum was bigger than all known Arctotheriums.
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Post by brobear on Feb 19, 2020 14:51:28 GMT -5
fossilhuntress.blogspot.com/2019/08/pleistocene-bears.html Fossil remains of Agriotherium, the short-faced giant bear, have been found in Collepardo, Italy. A fragment of a mandible was unearthed back in 2015 in the province of Frosinone. Thanks to several years of research and a recent CT scan, the team from Sapienza University of Rome were finally ready to publish. Agriotherium is one of the largest of the mighty carnivores that lived in Europe back in the Pleistocene. They weighed as much as 900 kilos (almost 2,000 lbs) and grew up to 2.5 meters tall. These ancient bears roamed prehistoric Italy amid a humid and temperate climate, competing for food resources with some of our ancestors as they only becoming extinct 2.6 million years ago.
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Post by brobear on Oct 29, 2020 6:23:50 GMT -5
Art by Marco Bianchini - Agriotherium, Miocene, Collepardo Frosinone (Italy)
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Post by brobear on Jan 1, 2021 4:59:10 GMT -5
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Post by brobear on Jan 17, 2021 7:55:03 GMT -5
WORLD OF PREHISTORIC CREATURES Agriotherium, a species of bear from Miocene to Pleistocene North America, Europe, Africa, and Asia. It was about 2.5 m. long and stood 1.65 m. tall at the shoulder. by Joschua Knüppe
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Post by brobear on Oct 17, 2021 1:34:57 GMT -5
www.prehistoric-wildlife.com/species/a/agriotherium.html One of the better known bears in the worlds fossil record, the Agriotherium genus is also easily one of the largest currently known. With this large size it would be tempting to portray Agriotherium as a savage killers of any animal that might be unfortunate enough to be in its way, yet like with its more famous relative Arctodus (better known as the giant short faced bear) first impressions may in this case be deceptive. The post cranial skeleton of Agriotherium is that of a large but relatively underpowered animal that simply does not seem to have the skeletal framework necessary to cope with high stresses, such as those expected to be encountered while undergoing extreme physical exertion (i.e. catching and subduing struggling prey). The second clue is that Agriotherium has a proportionately short snout to that seen in many other bears. The advantages of having a short snout are simple, it means that whatever is being bitten, is closer to the point of jaw articulation (fulcrum) so that greater force can be brought to bear (no pun intended) against it. These are all features that are common to Arctodus which also has isotopic analysis of its bones revealing that it was eating nearly every type of animal in its ecosystem, something very unusual for a predator, but common for a scavenger. Given the superficial similarity in form between Agriotherium and Arctodus, it’s reasonable to speculate that Agriotherium may have been a specialised scavenger, a theory that is becoming increasingly put forward for Arctodus. Again, the concept is very simple, by being bigger than any other predator on the land, Agriotherium could in effect bully the smaller predators away from their kills. This draws parallels in bear/wolf interaction that is observed in the wild even today, where grizzly bears will watch a pack of wolves bring down a prey animal, just to charge on in and drive them off after they have done all of the work for it. This fits with the surprisingly gracile skeleton of a large animal like Agriotherium, since if it was letting other predators do the work and the killing for it, why waste precious nutrients and calories upon developing and maintaining a skeleton stronger than it needed to be? Another thing to consider is that if Agriotherium was a scavenger then it was likely getting to carcasses after all of the choice pieces of meat had been consumed with perhaps only bones being left. This would probably not be enough to thwart Agriotherium from a meal however since the short snout, strong jaw closing muscles and robust construction of the skull and jaws were all the things that Agriotherium needed to develop massive bite force. Computer modelling in a 2012 study (see links below) confirmed that Agriotherium had one of the largest bite forces known amongst the members of the Carnivora (A group of mammals that includes dogs, bears, cats, pinnipeds etc which are specially adapted to exist by eating meat). By being able to crack open bones, Agriotherium could access and eat the bone marrow within, and for those not familiar, bone marrow is one of the most nutritious parts of an animal, and can last for several years after an animals death when encased inside of the bones. The idea of Agriotherium being what is termed a ‘hyper-carnivore’ is plausible, though it is not certain that Agriotherium only ate meat. Like with bears today, Agriotherium may have also supplemented its diet with fruits and certain plants, particularly tougher ones that required strong jaws. However the scavenger theory does actually fit better with Agriotherium in terms of the age of known fossils. Agriotherium first appears just after halfway through the Miocene before disappearing at the end of the Pliocene. The similar Arctodus however begins to appear in the Pliocene before becoming most numerous during the Pleistocene. It might be that Agriotherium was one of the first specialised scavenger bears but was eventually replaced in the worlds ecosystems by more advanced versions that form separate genera, as well as possibly other bone crunching animals such as hyena.
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Post by Deleted on Aug 18, 2022 17:12:57 GMT -5
Do you have any scientific source with bone measurements which suggest such large sizes for the genus Agriotherium? The only measurement i have that suggest a "large size" for Agriotherium is a skull about 47 cm in length. Do you know humerus or femora length? Standing 1.65 meters at the shoulder (which is really enormous) is not credible for the moment i think, we need more data.
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Post by brobear on Aug 18, 2022 23:51:41 GMT -5
Do you have any scientific source with bone measurements which suggest such large sizes for the genus Agriotherium? The only measurement i have that suggest a "large size" for Agriotherium is a skull about 47 cm in length. Do you know humerus or femora length? Standing 1.65 meters at the shoulder (which is really enormous) is not credible for the moment i think, we need more data. At this point, we have not found any skeletal measurements on Agriotherium. I will not dispute the size given without seeing such data. handwiki.org/wiki/Biology:Agriotherium A. africanum measured around 2 metres (7 ft) in body length and weighed up to 750 kilograms (1,650 lb), making it larger than most living bears; however, mass estimates vary, with further studies presenting a lower mass estimate of 317–540 kilograms (699–1,190 lb). Along with other large bears such as the cave bear, short-faced bears Arctodus and Arctotherium, and an extinct subspecies of the modern polar bear Ursus maritimus tyrannus, Agriotherium was among the largest known terrestrial members of Carnivora.
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Post by brobear on Dec 26, 2022 6:32:33 GMT -5
Name: Agriotherium (Sour beast). Phonetic: Ag-ree-o-fee-ree-um. Named By: Wagner - 1837. Synonyms: Agriotherium coffeyi, Hyaenarctos. Classification: Chordata, Mammalia, Carnivora, Arctoidea, Ursidae, Ursinae. Species: T. sivalensis (type), T. africanum, T. hendeyi, T. inexpetans, T. schneideri. Diet: Probably an Omnivore. Size: Approximately 2.7 meters long and up to around 650 kilograms. It stood almost 3 meters (9.8 ft) on its hind legs, and stood 1.6 meters (5.2 ft) high at the shoulders. Known locations: Across Africa, Eurasia and North America. Time period: Serravalian of the Miocene through to the Piacenzian of the Pliocene. Fossil representation: Multiple individuals.
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