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Post by brobear on Dec 27, 2018 17:14:00 GMT -5
Both the Neanderthal hunter and the giant steppebear were looking for giant elk. Unfortunately for the Neanderthal they found each other first. Colored version of an old doodle inspired by Ursus arctos priscus, a subspecies of brown bear that lived in Europe (including the UK, where it seemingly was the top predator for a while), and which reached huge size, being as large as Kodiak bears and possibly bigger than your average cave bear. Unlike cave bears, it seems to have been very carnivorous; by all accounts a tremendously dangerous beast, more than enough to bruin your day! www.deviantart.com/hodarinundu/art/Savage-Steppebear-773046125?fbclid=IwAR02iSQkOkbQ1maJTxSXbzcOeZ09tvg3qVVzOL5-CmiZDxwHlJzS3LbtR0Y
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Post by brobear on Jan 7, 2019 14:28:26 GMT -5
I have searched for science study articles concerning the recent views of the so-called tyrant sea bear ( Ursus maritimus tyrannus ) which we know now was not a polar bear but a brown bear. Thus far I am coming up empty.
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Post by brobear on Feb 20, 2019 4:34:42 GMT -5
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Post by brobear on Feb 20, 2019 4:49:16 GMT -5
167 centimeters is equal to 65.75 inches or 5 feet 6 inches high. ( European Steppe Bear ).... 1,874 pounds. 185 centimeters is equal to 72.83 inches or 6 feet 1 inche high. ( Arctodus simus ).... 2,425 pounds.
147 centimeters is equal to 57.87 inches or 4 feet 10 inches high. ( Kodiak Bear ).... 1,500 pounds. 180 centimeters is equal to 70.87 inches or 5 feet 11 inches high. ( Arctotherium angustidens ).... 2,425 pounds. ( weights are normal maximum ).
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Post by brobear on Feb 20, 2019 6:48:44 GMT -5
European Steppe Bear ( or is it Ursus maritimus tyrannus ? ) - I say brown bear.
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Post by brobear on Mar 3, 2019 4:53:20 GMT -5
Ursus (?) tyrannus Initially thought to be a Polar Bear, it may in fact be a Brown Bear from the late Pleistocene. The weight estimates have varied from 400 kg to 1,200 kg, but all they have to go on is a 48.5 cm ulna from a thought to be subadult, and a left mandible. Below is a hypothetical restoration: carnivora.net/index.php by Taipan. 1200 kilograms is equal to 2,645.55 pounds (avoirdupois) *Note: because I know that initial weights are usually over-the-top, I would *guess that Ursus ( ? ) tyrannus was a Steppe bear and he ( boar ) averaged about 1,200 pounds with a max-weight of perhaps 2,200 pounds. Biggest-ever bear of the genus Ursus.
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Post by King Kodiak on Mar 3, 2019 5:23:55 GMT -5
Ursus (?) tyrannus Initially thought to be a Polar Bear, it may in fact be a Brown Bear from the late Pleistocene. The weight estimates have varied from 400 kg to 1,200 kg, but all they have to go on is a 48.5 cm ulna from a thought to be subadult, and a left mandible. Below is a hypothetical restoration: carnivora.net/index.php by Taipan. 1200 kilograms is equal to 2,645.55 pounds (avoirdupois) *Note: because I know that initial weights are usually over-the-top, I would *guess that Ursus ( ? ) tyrannus was a Steppe bear and he ( boar ) averaged about 1,200 pounds with a max-weight of perhaps 2,200 pounds. Biggest-ever bear of the genus Ursus. Are you thinking that Tyrannus was like a different subspecies of the Steppe brown bear? Or Ursus arctos Priscus itself?
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Post by brobear on Mar 3, 2019 5:26:59 GMT -5
IMO - Ursus arctos priscus. But, perhaps related like inland grizzly to Alaskan peninsula grizzly... ?
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Post by King Kodiak on Mar 3, 2019 5:34:41 GMT -5
IMO - Ursus arctos priscus. But, perhaps related like inland grizzly to Alaskan peninsula grizzly... ? Definatly, in my opinion, IF it finally is a Steppe brown bear, it should be a new subspecies. Lets hope we get more news from Tyrannus soon.
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Post by brobear on Mar 3, 2019 5:58:37 GMT -5
IMO - Ursus arctos priscus. But, perhaps related like inland grizzly to Alaskan peninsula grizzly... ? Definatly, in my opinion, IF it finally is a Steppe brown bear, it should be a new subspecies. Lets hope we get more news from Tyrannus soon.URSUS ARCTOS TYRANNUS
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Post by brobear on Mar 3, 2019 6:45:56 GMT -5
wildfact.com/forum/ ......... by Ghari Sher Well, Ursus "maritimus tyrannus" is pretty likely not to be a valid subspecies, but I would be more cautious to name Ursus arctos tyrannus as a valid subspecies instead, since they do have to be a phylogenetically distinct form of bear to the already-named mainland brown bears of late Pleistocene Europe, known as steppe brown bears - Ursus arctos priscus. That said, it is true that these British bears were isolated for a considerable amount of time, from about 87.22-66.8 thousand years ago, based on the dating of this period, spanning roughly 20,000 years, until the glaciers expanded and the mainland fauna were able to return to the British Isles, causing a prompt shrinking + ecological subjugation of both the brown bears and wolves: onlinelibrary.wiley.com/doi/abs/10.1002/jqs.898 onlinelibrary.wiley.com/doi/abs/...2/jqs.1112 By comparison, the Kodiak bears, alongside those of the other Alaskan islands, have only been isolated for about 10,000 years, and have also grown to huge sizes. research.amnh.org/~rfr/paetkau98.pdf Given that they are ostensibly recognised as their own subspecies (U. a. middendorffi), I supposed this may lend credence to the approach of separating the mainland Ursus arctos priscus from the larger insular offshoot Ursus arctos tyrannus, but I won't make any strict judgements regarding that, since the taxonomy of these British bears below the level of species is not really discussed in the literature. But there is a possible scenario - of there being British tyrant brown bears while the mainland has steppe brown bears, who eventually migrated to the British Isles come the landbridge, and genetically swamped the tyrant brown bear population. Whether we should consider them to be steppe brown bears is something which has been on my mind, I have e-mailed Prof. Adrian Marciszak about this, though I have yet to receive a reply. I don't think anyone here has spoken of the extremely large steppe brown bear remains described by Marciszak (2017). www.researchgate.net/publication...rhinocerosIn particular the distal femoral fragment on the far left from Skarszyn, Poland. It has a distal width of 124.2mm, and an estimated total length of femur of 550-560mm, which is a huge bear indeed. It equals if not dwarfs the cave bear remains with which it is compared. If anyone can find cave bear femora that exceed this giant, I'd be grateful if they tell me. Of course this is probably a very large male relative to the average steppe brown bear, but it does go to show the immense size reached by these Pleistocene brown bears in Europe. In a nut-shell, Ursus arctos tyrannus ( I am taking liberties in re-naming him ) was a Steppe bear isolated from the mainland bears for 20,000 years - twice as long as Kodiak bears have been isolated. Therefore, yes - his own subspecies for certain.
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Post by brobear on Mar 3, 2019 11:56:07 GMT -5
"The Kew Bridge find is special in that it is an ulna of a very large animal, considerably larger than present-day polar bears. Kurtén (1964) assigned it to a polar bear subspecies, Ursus maritimus tyrannus. The Kew Bridge specimen has recently been reinvestigated by scientists at London’s Natural History Museum, and they are now confident that the Kew animal was a type of brown bear, U. arctos (Andy Currant, pers. comm. 2008)." quote from www.polarresearch.net/index.php/p.../6131/6810
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Post by King Kodiak on Mar 3, 2019 12:05:02 GMT -5
"The Kew Bridge find is special in that it is an ulna of a very large animal, considerably larger than present-day polar bears. Kurtén (1964) assigned it to a polar bear subspecies, Ursus maritimus tyrannus. The Kew Bridge specimen has recently been reinvestigated by scientists at London’s Natural History Museum, and they are now confident that the Kew animal was a type of brown bear, U. arctos (Andy Currant, pers. comm. 2008)." quote from www.polarresearch.net/index.php/p.../6131/6810So....Ursus arctos Tyrannus. I have a feeling you are happy about this. Yet another Ursus Arctos, this species just keeps getting larger.
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Post by brobear on Mar 3, 2019 12:25:53 GMT -5
This isn't carved in stone just yet. Not enough evidence to do any confirmation of a name change. Thus far Ursus ( ? ) tyrannus is thought to be a brown bear by some experts, but his true identity remains in question. More theory than fact. I just hope that there are fossil hunters in the area searching for Ursus ? tyrannus remains.
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Post by King Kodiak on Mar 3, 2019 12:33:25 GMT -5
This isn't carved in stone just yet. Not enough evidence to do any confirmation of a name change. Thus far Ursus ( ? ) tyrannus is thought to be a brown bear by some experts, but his true identity remains in question. More theory than fact. I just hope that there are fossil hunters in the area searching for Ursus ? tyrannus remains. Lets hope so. We need more fossils being found. But it looks like we are heading in the Ursus arctos direction. I would not mind if they finally confirmed it to be “maritimus”, we already have plenty of brown bear subspecies.
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Post by brobear on Mar 3, 2019 13:34:49 GMT -5
If Pleistocene polar bears were living on an island where they probably rarely if ever saw a seal, feeding on whatever herbivores shared their domain, seasonal fish, as well as foraging vegetation, how then were they larger than modern polar bears who feed on the fattiest foods on earth? How could a richer diet cause them to down-size?
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Post by King Kodiak on Mar 3, 2019 13:51:33 GMT -5
If Pleistocene polar bears were living on an island where they probably rarely if ever saw a seal, feeding on whatever herbivores shared their domain, seasonal fish, as well as foraging vegetation, how then were they larger than modern polar bears who feed on the fattiest foods on earth? How could a richer diet cause them to down-size? Very good question brobear. We will have to research that one.
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Post by King Kodiak on Mar 4, 2019 19:21:48 GMT -5
Very good question brobear. We will have to research that one. I believe its because Ursus ( ? ) tyrannus was a grizzly. Good theory. I agree.
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Post by brobear on Mar 22, 2019 5:33:56 GMT -5
Most experts today consider Ursus maritimus tyrannus to be a brown bear rather than an early polar bear.
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Post by Deleted on Mar 23, 2019 3:48:31 GMT -5
Well if that's what the experts say, I have no objection as polar bears came from brown bears anyway.
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