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Ursinae
Ursinae is a subfamily of Ursidae (bears) named by Swainson (1835). It was assigned to Ursidae by Bjork (1970), Hunt (1998) and Jin et al. (2007). Classification The genera ''Melursus'' and ''Helarctos'' are sometimes also included in ''Ursus''. The Asiatic black bear and the polar bear used to be placed in their own genera, ''Selenarctos'' and ''Thalarctos''; these are now placed at subgenus rank. * Subfamily Ursinae Fischer de Waldheim, 1817 ** '' Helarctos'' Horsfield, 1825 *** ''Helarctos malayanus'' ( Raffles, 1821) – sun bear ** '' Melursus'' Meyer, 1793 ***''Melursus ursinus'' (Shaw, 1791) – sloth bear ** '' Ursus'' Linnaeus, 1758 *** ''Ursus americanus'' (Pallas, 1780) – American black bear *** ''Ursus arctos'' Linnaeus, 1758 – brown bear *** †''Ursus boeckhi'' Schlosser, 1899 *** †''Ursus deningeri'' Richenau, 1904 *** †''Ursus etruscus'' Cuvier, 1823 *** †''Ursus ingressus'' Rabeder, Hofreiter, Nagel & Withalm 2004 *** †''Ursus kudarensis'' Ba ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ursidae
Bears are carnivoran mammals of the family Ursidae. They are classified as caniforms, or doglike carnivorans. Although only eight species of bears are extant, they are widespread, appearing in a wide variety of habitats throughout the Northern Hemisphere and partially in the Southern Hemisphere. Bears are found on the continents of North America, South America, Europe, and Asia. Common characteristics of modern bears include large bodies with stocky legs, long snouts, small rounded ears, shaggy hair, plantigrade paws with five nonretractile claws, and short tails. While the polar bear is mostly carnivorous, and the giant panda feeds almost entirely on bamboo, the remaining six species are omnivorous with varied diets. With the exception of courting individuals and mothers with their young, bears are typically solitary animals. They may be diurnal or nocturnal and have an excellent sense of smell. Despite their heavy build and awkward gait, they are adept runners, climbers, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sun Bear
The sun bear (''Helarctos malayanus'') is a species in the family Ursidae (the only species in the genus ''Helarctos'') occurring in the tropical forests of Southeast Asia. It is the smallest bear, standing nearly at the shoulder and weighing . It is stockily built, with large paws, strongly curved claws, small rounded ears and a short snout. The fur is generally jet-black, but can vary from grey to red. Sun bears get their name from the characteristic orange to cream coloured chest patch. Its unique morphology—inward-turned front feet, flattened chest, powerful forelimbs with large claws—suggests adaptations for climbing. The most arboreal (tree-living) of all bears, the sun bear is an excellent climber and sunbathes or sleeps in trees above the ground. It is mainly active during the day, though nocturnality might be more common in areas frequented by humans. Sun bears tend to remain solitary but sometimes occur in pairs (such as a mother and her cub). They do not seem t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Helarctos
The sun bear (''Helarctos malayanus'') is a species in the family Ursidae (the only species in the genus ''Helarctos'') occurring in the tropical forests of Southeast Asia. It is the smallest bear, standing nearly at the shoulder and weighing . It is stockily built, with large paws, strongly curved claws, small rounded ears and a short snout. The fur is generally jet-black, but can vary from grey to red. Sun bears get their name from the characteristic orange to cream coloured chest patch. Its unique morphology—inward-turned front feet, flattened chest, powerful forelimbs with large claws—suggests adaptations for climbing. The most arboreal (tree-living) of all bears, the sun bear is an excellent climber and sunbathes or sleeps in trees above the ground. It is mainly active during the day, though nocturnality might be more common in areas frequented by humans. Sun bears tend to remain solitary but sometimes occur in pairs (such as a mother and her cub). They do not seem t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polar Bear
The polar bear (''Ursus maritimus'') is a hypercarnivorous bear whose native range lies largely within the Arctic Circle, encompassing the Arctic Ocean, its surrounding seas and surrounding land masses. It is the largest extant bear species, as well as the largest extant land carnivore. A boar (adult male) weighs around , while a sow (adult female) is about half that size. Although it is the sister species of the brown bear, it has evolved to occupy a narrower ecological niche, with many body characteristics adapted for cold temperatures, for moving across snow, ice and open water, and for hunting seals, which make up most of its diet. Although most polar bears are born on land, they spend most of their time on the sea ice. Their scientific name means "maritime bear" and derives from this fact. Polar bears hunt their preferred food of seals from the edge of sea ice, often living off fat reserves when no sea ice is present. Because of their dependence on the sea ice, polar be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eurasian Brown Bear
The Eurasian brown bear (''Ursus arctos arctos'') is one of the most common subspecies of the brown bear, and is found in much of Eurasia. It is also called the European brown bear, common brown bear, common bear, and colloquially by many other names. The genetic diversity of present-day brown bears (''Ursus arctos'') has been extensively studied over the years and appears to be geographically structured into five main clades based upon analysis of the mtDNA. Description The Eurasian brown bear has brown fur, which ranges from yellowish-brown to dark brown, red-brown, and almost black in some cases; albinism has also been recorded. The fur is dense to varying degrees and the hair can grow up to in length. The head normally is quite round in shape and has relatively small rounded ears, a wide skull and a mouth equipped with 42 teeth, including predatory teeth. It has a powerful bone structure and large paws equipped with claws that can grow up to in length. The weight varie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extinction
Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and recover may have been lost before this point. Because a species' potential range may be very large, determining this moment is difficult, and is usually done retrospectively. This difficulty leads to phenomena such as Lazarus taxa, where a species presumed extinct abruptly "reappears" (typically in the fossil record) after a period of apparent absence. More than 99% of all species that ever lived on Earth, amounting to over five billion species, are estimated to have died out. It is estimated that there are currently around 8.7 million species of eukaryote globally, and possibly many times more if microorganisms, like bacteria, are included. Notable extinct animal species include non-avian dinosaurs, saber-toothed cats, dodos, m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Max Schlosser (zoologist)
Max Schlosser (5 February 1854 – 7 October 1932) was a German zoologist and paleontologist. He is best known for his research on extinct primates and Caniformia. External links Schlosser Biographyfrom Scribd Scribd Inc. is an American e-book and audiobook subscription service that includes one million titles. Scribd hosts 60 million documents on its open publishing platform. The company was founded in 2007 by Trip Adler, Jared Friedman, and Tikhon ... {{DEFAULTSORT:Schlosser, Max German paleontologists 19th-century German zoologists Place of birth missing Place of death missing 1854 births 1932 deaths 20th-century German zoologists ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ursus Deningeri
''Ursus deningeri'' (Deninger's bear) is an extinct species of bear, endemic to Eurasia during the Pleistocene for approximately 1.7 million years, from . The range of this bear has been found to encompass both Europe and Asia, demonstrating the ability of the species to adapt to many Pleistocene environments. ''U. deningeri'' is a descendant of ''U. savini'' and an ancestor of ''U. spelaeus''. Morphology ''Ursus deningeri'' has a combination of primitive and derived characters that distinguishes it from all other Pleistocene bears. Its mandible is slender like that of living brown bears and '' Ursus etruscus''. It also has derived characters of cave bears (''Ursus spelaeus'') and is considered to be the descendant of ''Ursus savini'' and very close to the common ancestor of brown bears. Fossil distribution Sites and specimen ages: *Nalaikha, Mongolia: ~1.8 Mya to 800,000 years ago *West Runton Freshwater Bed, Cromer Forest Bed Formation, Norfolk, England: ~800,000–100,000 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ursus Etruscus
''Ursus etruscus'' (the Etruscan bear) is an extinct species of bear, endemic to Europe, Asia and North Africa during the Pliocene through Pleistocene, living from ~5.3 million to 100,000 years ago. Taxonomy ''Ursus etruscus'' appears to have evolved from ''Ursus minimus'' and gave rise to the modern brown bear, ''Ursus arctos'', and the extinct cave bear, ''Ursus spelaeus''. The range of ''Ursus etruscus'' was mostly continental Europe with specimens also recovered in the Great Steppe region of Eurasia. Fossil evidence for ''Ursus etruscus'' was recovered in Palestine, Croatia, and Tuscany, Italy. Some scientists have proposed that the early, small variety of ''U. etruscus'' of the middle Villafranchian era survives in the form of the modern Asian black bear. Morphology Not unlike the brown bears of Europe in size, it had a full complement of premolars, a trait carried from the genus ''Ursavus''. Fossil distribution Sites and specimen ages: *Vassiloudi, Macedonia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Georges Cuvier
Jean Léopold Nicolas Frédéric, Baron Cuvier (; 23 August 1769 – 13 May 1832), known as Georges Cuvier, was a French natural history, naturalist and zoology, zoologist, sometimes referred to as the "founding father of paleontology". Cuvier was a major figure in natural sciences research in the early 19th century and was instrumental in establishing the fields of comparative anatomy and paleontology through his work in comparing living animals with fossils. Cuvier's work is considered the foundation of vertebrate paleontology, and he expanded Linnaean taxonomy by grouping classes into phylum, phyla and incorporating both fossils and living species into the classification. Cuvier is also known for establishing extinction as a fact—at the time, extinction was considered by many of Cuvier's contemporaries to be merely controversial speculation. In his ''Essay on the Theory of the Earth'' (1813) Cuvier proposed that now-extinct species had been wiped out by periodic catastrophi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ursus Kudarensis
Ursus is Latin for bear. It may also refer to: Animals * ''Ursus'' (mammal), a genus of bears People * Ursus of Aosta, 6th-century evangelist * Ursus of Auxerre, 6th-century bishop * Ursus of Solothurn, 3rd-century martyr * Ursus (''praefectus urbi'') of Constantinople in 415-416 * Reimarus Ursus, an astronomer and imperial mathematician to Rudolf II * Ursus, a pen-name of Ambrose Bierce Fictional characters * Ursus, the bodyguard of Ligia, a minor character in the novel ''Quo Vadis'' * Ursus, a character in Victor Hugo's novel ''The Man Who Laughs'' * General Ursus (Planet of the Apes), a character in ''Beneath the Planet of the Apes'' * Ursus (film character), a character in a series of 1960s Italian adventure films Arts * ''Ursus'' (film), 1961 Italian film Science and technology * ''Ursus'' (journal), a scientific journal published by the International Association for Bear Research and Management * Ursus Factory, Polish manufacturer of heavy vehicles ** Ursus A, a serie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ursus Ingressus
''Ursus ingressus'' (the Gamssulzen Cave bear) is an extinct species of the family Ursidae that lived in Central Europe during the Late Pleistocene. It is named after the Gamssulzen Cave in Austria, where the holotype of this species was found.Gernot Rabeder (2004): Die Höhlenbären der Sulzfluh-Höhlen, Vorarlberger Naturschau 15, Seite 103–114 Description ''Ursus ingressus'' was a large cave bear with massive, bulky limbs. It was larger than ''Ursus spelaeus'', which has been estimated to weigh an average of (male specimen). Behaviour Some studies have suggested the Gamssulzen Cave bear to have been herbivorous, living of vegetation with little contribution of grass. Other studies proposed ''Ursus ingressus'' to have been an omnivore, with participation of terrestrial and more likely aquatic animal protein, that exceeds the participation of animal protein in the diet of the modern brown bear ''(Ursus arctos)''. However it has also been suggested, that the feeding habits ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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