The Ursidae Family Allen Wilson 7-29-08 Dr. McCall

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Scientific classification. Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Carnivora Suborder: Caniformia Family: Ursidae Subfamily: Ailurinae (Panda bear) Subfamily: Ursinae (The other 7 types of bear . Transformative Divergence of Ursidae. Birthplaces of this family can be followed to Paractis (little, skull 7 cm.)Paractis initially happened in North America amid the Late Eocene, yet not found in Eurasia

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The Ursidae Family Allen Wilson 7-29-08 Dr. McCall

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Taxonomy Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Carnivora Suborder: Caniformia Family: Ursidae Subfamily: Ailurinae (Panda bear) Subfamily: Ursinae (The other 7 types of bear

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Evolutionary Divergence of Ursidae Origins of this family can be followed to Paractis (little, skull 7 cm.) Paractis initially happened in North America amid the Late Eocene, yet not found in Eurasia and Africa until Miocene However, proposals prompts to hypothesis that prior ursids in Asia, amid Eocene, offered ascend to Paractis in North America, albeit no fossils of Paractis have been found in East Asia This movement may have happened by means of a noteworthy ocean level lowstand 37 million years back

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Evolution of Ursidae (cont.) The most primitive ursid was Cephalogale, a raccoon-sized, pooch like animal Cephalogale initially showed up in the Oligocene to early Miocene in Europe Cephalogale offered ascend to early bears (Ursavus) in Europe Ursavus transmitted into Asia and offered ascend to the primary genuine bears (Ursus) in Europe or Asia around 5 million years back

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Cephalogale jaw

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More Evolution! Ursids turned out to be extremely differentiated in the Oligocene in Asia Four species are found in Asia corresponding to this time, three are discovered ordinarily in Europe, however one is endemic to Asia (proposing speciation) Migration of most early ursids to North America is recommended to happen amid the late Oligocene and early Miocene True bears (Ursus) relocated amid the Pliocene around 4 million years back

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Ursidae family tree

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Ursidae Genera Tremarctos including Spectacled bear Ailuropoda including the Giant Panda Ursus including American Black Bear, Asiatic mountain bear, polar bear, cocoa bear, Malaysian sun bear, and sloth bear

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Urisidae phylogeny

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Species of Ursidae family · American Black Bear ( Ursus americanus ) · Asiatic Black Bear ( Ursus thibetanus ) · Brown bear ( Ursus arctos ) · Giant Panda ( Ailuropoda melanoleuca ) · Polar Bear ( Ursus maritimus ) · Sloth Bear ( Melursus ursinus ) · Spectacled Bear ( Tremarctos ornatus ) · Sun Bear ( Helarctos malayanus )

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Giant Panda Ailuropoda veered from the Ursavus gather between 18-22 million years prior The Giant Panda was the principal present day bear to emerge from this gathering The scope of this gathering displays little movement from their transformative home in Asia, presumably because of a restricted nourishment source Only 700-1000 exist in wild

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Giant Panda Range

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Giant Panda

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Sloth Bears Ursis ursinus transmitted from the other ursidae relatives around 7 million years prior The most seasoned ursis bear, and nothing unexpected that it has the most remote east circulation, not going much from its tribal home

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Sloth Bears

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Malaysian sun bear Smallest of the considerable number of bears, steady with Bergmann's govern Polar is the biggest and most northern, and sun bear is the littlest and close equator Diverged around 5 million years prior from the ancestry prompting to polar and chestnut bears

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Malaysian sun bear run

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Asiatic Black Bear Closely identified with American wild bear, did not move to North America Lives in Eastern Asia, possessing good countries and tropical backwoods

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Asiatic mountain bear run

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Asiatic Black Bear

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American Black Bear Most firmly identified with Asiatic mountain bear Lineage containing these two bears split from others in the Ursidae family around 6 million years prior Within the following million years, these separated from each other Migrated to North America around 1-4 million years prior from Europe or Asia Two found in Meridian amid the most recent year

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American Black Bear: Range

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American Black Bear

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Which bear has this dispersion?

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Brown or Grizzly bear

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Brown Bear There are an expected 125-150,000 chestnut bears in the wild today. Most are in the previous U.S.S.R. (100,000), in Canada and Alaska(50,000) However there are detached populaces in country France and Spain (less than 100) and even in Mexico

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North American range (over a significant time span)

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Migration (Brown bears) The remote populaces staying in Europe recommends a relocation crosswise over Asia to North America, as proposed, amid the Pliocene The heredity containing the ursus bears separated around 5 million years back. The genealogy containing the polar bear and the chestnut bear appears to wander from each other around 400,000 years prior, making them close relatives (DNA testing)

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Polar bear

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Polar bear Closest with respect to cocoa shoulder Most undermined because of exhausting ice packs in Artic Found in Northern Artic Migration crosswise over incomprehensible ice scopes likely

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Polar Bear Range

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Spectacled bear Tramarctos veered from the last line of the Ursavus line around 10-15 million years back Found in Andes Mountains of South America, its principle territory is the cloud timberlands of the Andes It is viewed as debilitated

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Spectacled bear Range Map

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How? Since Gondwanaland and Laurasia were at that point isolated when these bears developed, the most intelligent clarification is that the bears speciated from Northern vagrant bears, by means of the Central American land connect

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Spectacled bear

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