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Ursus (genus)

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Title: Ursus (genus)  
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Ursus (genus)

Ursus
Temporal range: Pliocene - Holocene, 5.333–0 Ma
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From top to bottom: brown bear, American black bear, polar bear, Asian black bear.
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Carnivora
Family: Ursidae
Genus: Ursus[1][2]
Linnaeus, 1758
Species
Ursus arctos
Ursus americanus
Ursus maritimus
Ursus thibetanus
Ursus spelaeus (extinct)

Ursus is a genus in the family Ursidae (bears) that includes the widely distributed brown bears,[3] the polar bear,[4] and black bears. The name is derived from the Latin ursus, meaning bear.[5][6]

Species and subspecies of Ursus

  • American black bear, Ursus americanus
    • U. a. altifrontalis - Olympic black bear
    • U. a. amblyceps - New Mexico black bear
    • U. a. americanus eastern black bear
    • U. a. californiensis - California black bear
    • U. a. carlottae - Haida Gwaii black bear or Queen Charlotte black bear
    • U. a. cinnamomum - cinnamon bear
    • U. a. emmonsii - glacier bear
    • U. a. eremicus - Mexican black bear
    • U. a. floridanus - Florida black bear
    • U. a. hamiltoni - Newfoundland black bear
    • U. a. kermodei - Kermode bear or spirit bear
    • U. a. luteolus - Louisiana black bear
    • U. a. machetes - West Mexico black bear
    • U. a. perniger - Kenai black bear
    • U. a. pugnax - Dall black bear
    • U. a. vancouveri - Vancouver Island black bear
  • MacFarlane's bear, Ursus inopinatus (cryptid; if an authentic species, extinct)
  • Polar bear, Ursus maritimus (earlier Thalarctos maritimus)
    • U. m. maritimus - (no common name, classification contested)
    • U. m. marinus - Siberian polar bear (classification contested)
    • U. m. tyrannus Pleistocene polar bear

A hybrid between grizzly bears and polar bears has also been recorded. Known commonly as a pizzly, prizzly, or grolar bear, the official name is simply "grizzly–polar bear hybrid".

References

  1. ^ http://animaldiversity.ummz.umich.edu/accounts/Ursus/classification/
  2. ^ http://web.archive.org/web/20131224202903/http://www.departments.bucknell.edu/biology/resources/msw3/browse.asp?id=14000952
  3. ^ http://library.sandiegozoo.org/factsheets/brown_bear/brown_bear.html
  4. ^ http://library.sandiegozoo.org/factsheets/polar_bear/polar.htm
  5. ^ http://www.merriam-webster.com/dictionary/ursus
  6. ^ http://dictionary.reference.com/browse/ursus
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