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Pleistocene Polar Bear v Daeodon
Topic Started: Jan 31 2012, 02:50 PM (19,501 Views)
Taipan
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Pleistocene Polar Bear - Ursus maritimus tyrannus
Ursus maritimus tyrannus was a very large fossil subspecies of the polar bear that descended from an Arctic population of brown bears. Its name in Latin means Tyrant Sea Bear. Initially the isolated brown bears were no different than the variations of brown bears of that time period. Because litters of cubs can show significant species variations in hair color and hair thickness, this gave certain individuals a survival advantage passed on each generation. Eventually skull changes and even changes in dentition occurred leading to the smooth and rather quick evolution of U. maritimus tyrannus. U. maritimus tyrannus was considerably larger then its modern relative. If everything is scaled out correctly from its remains, it would had been 183 cm (6 ft) at the shoulders, 3,6 m (12 ft) long and would have weighted an average of 1.2 tons, making it the largest bear "and one of the largest mammalian carnivores to ever walk on land". Its tremendous size makes it even bigger than the other "largest" mammalian carnivores that ever lived, including Andrewsarchus, Agriotherium, and Arctodus simus. It's speculated that this gigantic bear would, due to its formidable size and strength, have preyed on mammoths which also lived during the time.

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Daeodon shoshonensis
Daeodon, one of the largest, if not the largest, entelodont artiodactyls, lived 25-18 million years ago in North America. The 3.6 m (12 ft) long, about 1.8 m at the shoulder, 90 cm long skulled, 600 - 1000 kg mass animal strongly resembled a giant, monstrous pig or warthog, possessing huge jaws with prominent tusks and flaring cheekbones. It possibly was a huge, bone-crushing scavenger and predator, found at Agate Springs Quarry. It had long skull bones under its eyes and bony protrusions on the lower jaw, not dissimilar to the 'warts' of the warthog, which may have supported jaw muscles. The well-known genus Dinohyus ("terrible pig") has now been synonymized with Daeodon, as the latter is the earlier name, having priority.

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Wolf Eagle
Jan 31 2012, 11:41 AM
Pleistocene Polar Bear vs. Daeodon
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Bright Nights
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Can we lay off on the picture comparisons please. They seem largely inaccurate because you're taking one artist's rendition and comparing it to the mirror of another, which may or may not be amply accurate.

I just want to clarify:

Firstly, Ursus maritimus tyrannus is more or less a pseudotaxon. In other words, it probably doesn't exist the way Kurten (1964) first described it. Later research confirmed that Ursus maritimus tyrannus was much more like the brown bear, Ursus arctos, than the polar bear.

It also probably wasn't as giant as once thought, although many people have circulated a picture of an ulna of U. m. tyrannus measuring 485 mm, which is massive (does anyone know where this is from?).

The picture in question is this, which was circulated in the old CARNIVORA forum in a few of the match-ups involving this bear:

http://media.photobucket.com/image/a.%20angustidens%20tyrannus%20femur/Grrraaahhh/Bears/ulnacomprsn01.jpg
Edited by Bright Nights, Feb 2 2012, 01:34 PM.
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jj5893
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The bear I think, is the most powerful land carnivore ever to walk the earth.
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FireCrown
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Daeodon wins the size comparison says it all.
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Mauro20
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Daeodon wins.
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Oaglor
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Judging by the size comparison, I would have to go with the land hippo on this one.
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yigit05
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daeodon size avantage,stronger bite
bear win paws,weight,more muscular
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yigit05
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very close fight
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yigit05
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bear stood up and falls down daeodon daeodon accelerates bear paw hits the right time.daeodon Can not stand up any more.Daedon huge bear paws, belly verities.bear strike is delayed, the opportunity to know and shoulder coup Daedon.
Daedon of using deadly jaw biting the head causes brain death
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yigit05
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Which one is right if you?
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TheUndertaker45
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Bear wins.
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ArachnidKid
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The bears use of it's arms is a great advantage, I see it being able toget around the jaws of the terminator pig and tear at it's neck
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Vivyx
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Big mismatch in favour of Daeodon, the PPB was only 400 kg.
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Dynasty Warrior
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The bear would win as it has the ability to grapple.
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Dynasty Warrior
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Catboy
Dec 8 2013, 06:25 AM
Big mismatch in favour of Daeodon, the PPB was only 400 kg.
Isn't it like 1.2 tonnes?
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Carcharadon
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Daeodon demolishes the bear.
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