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Post by King Kodiak on Feb 24, 2019 7:08:37 GMT -5
Well, that study shows that the skull was identical to todays European brown bears, but maybe you need more than the skull to be identical to change the subspecies name to Ursus arctos arctos. Maybe they need to study the whole skeleton also. I agree on keeping the name Ursus arctos priscus.
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Post by brobear on Feb 24, 2019 9:16:39 GMT -5
Well, that study shows that the skull was identical to todays European brown bears, but maybe you need more than the skull to be identical to change the subspecies name to Ursus arctos arctos. Maybe they need to study the whole skeleton also. I agree on keeping the name Ursus arctos priscus.
Nothing to be taken too seriously. In reality, subspecies is nothing more than a breed. A breed, such as a dog breed, is the product of deliberate breeding of chosen individuals. A subspecies in basically the same thing only designed by nature rather than man's choosing. All brown bears are Ursus arctos.
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Post by King Kodiak on Feb 24, 2019 9:28:13 GMT -5
Well, that study shows that the skull was identical to todays European brown bears, but maybe you need more than the skull to be identical to change the subspecies name to Ursus arctos arctos. Maybe they need to study the whole skeleton also. I agree on keeping the name Ursus arctos priscus.
Nothing to be taken too seriously. In reality, subspecies is nothing more than a breed. A breed, such as a dog breed, is the product of deliberate breeding of chosen individuals. A subspecies in basically the same thing only designed by nature rather than man's choosing. All brown bears are Ursus arctos. Definatly brobear. All brown bear are Ursus arctos, thats for sure. But that is the species. In my opinion, i really like having subspecies, it just individualizes a group more.
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Post by brobear on Mar 17, 2019 14:13:05 GMT -5
en.wikipedia.org/wiki/Steppe_brown_bear The steppe brown bear (Ursus arctos priscus) is an extinct subspecies of brown bear that lived in Eurasia during the Pleistocene period. Fossils of the bear have been found in various caves (Vazec Cave, Vyvieranie Cave, Lisková Cave, Kupcovie izbicka Cave, Okno Cave) in Slovakia. It may have weighed between 300 and 1,000 kilograms (660 and 2,200 lb) and was possibly more carnivorous than its modern relatives.
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Post by brobear on Oct 26, 2019 12:24:01 GMT -5
The researchers suggest that future research could explore what it means for a species to go extinct—if their DNA lives on in other species, are they really, truly gone? They note that their study reaffirms the fact that animal species interbreed, some regularly. That might have been the case with modern bears and cave bears—the ancient cave bears also had modern bear DNA in their gene pools. Ancient extinct cave bear DNA found in modern bears
August 29, 2018 by Bob Yirka, Phys.org report
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Post by King Kodiak on Oct 26, 2019 13:37:04 GMT -5
The researchers suggest that future research could explore what it means for a species to go extinct—if their DNA lives on in other species, are they really, truly gone? They note that their study reaffirms the fact that animal species interbreed, some regularly. That might have been the case with modern bears and cave bears—the ancient cave bears also had modern bear DNA in their gene pools. Ancient extinct cave bear DNA found in modern bears August 29, 2018 by Bob Yirka, Phys.org report I believe that those animals are extinct. Just because modern day brown bears have "some" Cave bear DNA does not mean that cave bears arent extinct. What do you think?
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Post by brobear on Oct 26, 2019 16:45:59 GMT -5
If the grizzly were 50% or at least 25% cave bear; then I would claim that the cave bear lives on. But the percentage of cave bear DNA is less.
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Post by OldGreenGrolar on Oct 26, 2019 17:03:08 GMT -5
/\ If all polar becomes become grolar bears or prizzly bears, they still live on since 50% of their genes are still polar bear.
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Post by tom on Oct 26, 2019 18:08:42 GMT -5
I would say technically you're correct. If 50% of the DNA is Polar Bear than you could make the argument that it is still a Polar Bear.
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Post by brobear on Oct 27, 2019 4:15:05 GMT -5
/\ If all polar becomes become grolar bears or prizzly bears, they still live on since 50% of their genes are still polar bear. The bear would be a hybrid, a grolar bear, but the polar bear would not be truly extinct. Those grolar bears would eventually filter into more grizzly populations ( if available ). Nevertheless, the polar bear is not extinct. The ABC bears are prime examples. They look like grizzlies, but have more polar bear DNA than brown bear. Remember also, the polar bear started out as a grizzly. They would simply be returning home to their roots.
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Post by brobear on Oct 29, 2019 10:57:16 GMT -5
en.wikipedia.org/wiki/Steppe_brown_bear The steppe brown bear (Ursus arctos priscus) is an extinct subspecies of brown bear that lived in Eurasia during the Pleistocene period. Fossils of the bear have been found in various caves (Vazec Cave, Vyvieranie Cave, Lisková Cave, Kupcovie izbicka Cave, Okno Cave) in Slovakia. It may have weighed between 300 and 1,000 kilograms (660 and 2,200 lb) and was possibly more carnivorous than its modern relatives.
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Post by brobear on Oct 29, 2019 11:02:30 GMT -5
pubag.nal.usda.gov/catalog/6341526 Steppe brown bear Ursus arctos “priscus” from the Late Pleistocene of Europe Author: Marciszak, Adrian, Schouwenburg, Charles, Lipecki, Grzegorz, Talamo, Sahra, Shpansky, Andrey, Malikov, Dmitriy, Gornig, Wiktoria Source: Quaternary international 2019 ISSN: 1040-6182 Subject: Pleistocene epoch, Ursus arctos, carnivores, climatic factors, cold, diet, steppes, teeth, Europe, North Sea Abstract: The steppe brown bear U. a. “priscus” is constant but not a common member of the Late Pleistocene paleocommunities. It is not distinct arctoid species, but a large brown bear ecomorph which lived in open environments. Instead to speleoid bears, which disappeared ca. 26-24 ka BP, arctoid bears, thanks to their ecological plasticity, were present in most of the European areas even during the cold phases. The size and diet of these bears were modified under the climate conditions and food availability.U. a. “priscus” cannot be distinguished genetically, but it differs metrically and morphologically. It was a big sized form with enlarged and broad cheek teeth. Late Pleistocene brown bears, especially those lived before the LGM were more carnivorous than the Holocene and recent brown bear. The steppe brown bear survived till the beginning of the Holocene, where the last relict populations lived around the Baltic and the North Sea decreasing in size and merging genetically with widely distributed Eurasian populations of U. a. arctos. Agid: 6341526
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Post by brobear on Oct 29, 2019 11:16:57 GMT -5
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Post by brobear on Oct 29, 2019 11:20:07 GMT -5
www.sciencedirect.com/science/article/pii/S1040618218308437 The steppe brown bear U. a. “priscus” is constant but not a common member of the Late Pleistocene paleocommunities. It is not distinct arctoid species, but a large brown bear ecomorph which lived in open environments. Instead to speleoid bears, which disappeared ca. 26-24 ka BP, arctoid bears, thanks to their ecological plasticity, were present in most of the European areas even during the cold phases. The size and diet of these bears were modified under the climate conditions and food availability. U. a. “priscus” cannot be distinguished genetically, but it differs metrically and morphologically. It was a big sized form with enlarged and broad cheek teeth. Late Pleistocene brown bears, especially those lived before the LGM were more carnivorous than the Holocene and recent brown bear. The steppe brown bear survived till the beginning of the Holocene, where the last relict populations lived around the Baltic and the North Sea decreasing in size and merging genetically with widely distributed Eurasian populations of U. a. arctos.
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Post by brobear on Oct 29, 2019 12:17:47 GMT -5
prehistoric-fauna.com/Ursus-arctos-priscus Pleistocene Steppe Brown Bear 1 reviews Ursus priscus (Ursus priscus (GOLDFUSS, 1818)) Ursus arctos priscus Pleistocene brown bear Steppe brown bear Order: Carnivora Family: Ursidae Dimensions: length - 2,9 m, height - 160 сm, weight - 300-1000 kg Temporal range:the Late Pleistocene - Holocene of Europe *Cannot copy and paste picture with this notebook.
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Post by King Kodiak on Oct 29, 2019 16:03:21 GMT -5
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Post by brobear on Dec 28, 2019 17:08:10 GMT -5
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Post by brobear on Dec 28, 2019 17:09:27 GMT -5
Ursus priscus 2 reviews Ursus priscus (Ursus priscus (GOLDFUSS, 1818)) Ursus arctos priscus
Pleistocene brown bear
Order: Carnivora
Family: Ursidae
Dimensions: length - 2,9 m, height - 140-160 сm, weight - 300-1000 kg
Temporal range:the Late Pleistocene - Holocene of Europe
From the beginning of the first scientific explorations of caves, the Zoolithenhöhle in Franconia, Germany, was famous for its rich fossil content. In addition to the numerous remains of cave bears and other animals, a skull of a clearly distinct kind of bear was found, originally called Ursus priscus GOLDFUSS, 1818. Three years later, the term Ursus fossilis was introduced along with a published description of the skull, which led to confusion about the adequate designation of the new species. U. priscus was regarded as a contemporary of the cave bear, i.e. Late Pleistocene in age, but the geological age of the find is still unclear even today, and from the overall state of preservation it could be even of Holocene age. The specimen probably represents a female individual. A revised study of the skull demonstrates that it is identical to modern U. arctos.On the basis of this evidence, U. priscus, U. fossilis and its synonyms are invalid terms. The nature of Late Pleistocene brown bears is still not well known.
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Post by brobear on Dec 28, 2019 17:15:15 GMT -5
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Post by brobear on Dec 28, 2019 17:17:01 GMT -5
Map of Middle Pleistocene localities of Ursus arctos in Yakutia.
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