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Tupaia Miocenica
''Tupaia miocenica'' is a fossil treeshrew from the Miocene of Thailand. Known only from a single tooth, an upper first or second molar, it is among the few known fossil treeshrews. With a length of 3.57 mm, the tooth is large for a treeshrew. At the back lingual corner (the side of the tongue), the tooth shows a small cusp, the hypocone, that is separated from the protocone in front of it by a narrow valley. The condition of the hypocone distinguishes this species from various other treeshrews. In addition, the presence of a well-developed but simple mesostyle (a small cuspule) is distinctive. Taxonomy ''Tupaia miocenica'' was described in 1997 by French paleontologists Pierre Mein and Léonard Ginsburg in a report on the fossil mammals of Li Mae Long, a Miocene site in Thailand.Mein and Ginsburg, 1997, p. 804 The animal is known from a single tooth, which according to Mein and Ginsburg's comparisons most closely resembles the living treeshrews of the genus '' Tupaia''.Me ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Million Years Ago
The abbreviation Myr, "million years", is a unit of a quantity of (i.e. ) years, or 31.556926 teraseconds. Usage Myr (million years) is in common use in fields such as Earth science and cosmology. Myr is also used with Mya (million years ago). Together they make a reference system, one to a quantity, the other to a particular place in a year numbering system that is ''time before the present''. Myr is deprecated in geology, but in astronomy ''Myr'' is standard. Where "myr" ''is'' seen in geology it is usually "Myr" (a unit of mega-years). In astronomy it is usually "Myr" (Million years). Debate In geology a debate remains open concerning the use of ''Myr'' (duration) plus ''Ma'' (million years ago) versus using only the term ''Ma''. In either case the term '' Ma'' is used in geology literature conforming to ISO 31-1 (now ISO 80000-3) and NIST 811 recommended practices. Traditional style geology literature is written The "ago" is implied, so that any such year number "X Ma" ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tooth Wear
Tooth wear refers to loss of tooth substance by means other than dental caries. Tooth wear is a very common condition that occurs in approximately 97% of the population. This is a normal physiological process occurring throughout life; but with increasing lifespan of individuals and increasing retention of teeth for life, the incidence of non-carious tooth surface loss has also shown a rise. Tooth wear varies substantially between people and groups, with extreme attrition and enamel fractures common in archaeological samples, and erosion more common today. Tooth wear is predominantly the result of a combination of three processes; attrition, abrasion and erosion. These forms of tooth wear can further lead to a condition known as abfraction, where by tooth tissue is 'fractured' due to stress lesions caused by extrinsic forces on the enamel. Tooth wear is a complex, multi-factorial problem and there is often difficulty identifying a single causative factor. However, tooth wear is o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MN 4 (biostratigraphic Zone)
In biostratigraphy, MN 4 is one of the MN zones used to characterize the fossil mammal faunas of the Neogene of Europe. It is preceded by MN 3 and followed by MN 5; together, these three zones form the Orleanian age of the middle Miocene. This zone starts within magnetostratigraphic chron C5Dr, at 18 million years ago, and ends within chron C5Cr, at 17.0 million years ago, although some different correlations have been proposed.Steininger, 1999, p. 16 The reference locality used to correlate faunas with this zone is La Romieu (southwestern France); other localities include Artesilla and Buñol in Spain, Tägernaustrasse-Jona in Switzerland, Erkertshofen 2 and Petersbuch 2 in Germany, Belchatov C in Poland, and Aliveri in Greece.Mein, 1999, p. 28 In this zone, the common muroid rodent '' Democricetodon'' immigrates into Europe from Asia, followed shortly after by three other muroids: '' Megacricetodon'', '' Eumyarion'', and '' Anomalomys''. '' Cricetodon'', which later also r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Early Miocene
The Early Miocene (also known as Lower Miocene) is a sub-epoch of the Miocene Epoch made up of two stages: the Aquitanian and Burdigalian stages. The sub-epoch lasted from 23.03 ± 0.05 Ma to 15.97 ± 0.05 Ma (million years ago). It was preceded by the Oligocene epoch. As the climate started to get cooler, the landscape started to change. New mammals evolved to replace the extinct animals of the Oligocene epoch. The first members of the hyena and weasel family started to evolve to replace the extinct ''Hyaenodon'', entelodonts and bear-dogs. The chalicotheres survived the Oligocene epoch. A new genus of entelodont called ''Daeodon'' evolved in order to adapt to the new habitats and hunt the new prey animals of the Early Miocene epoch; it quickly became the top predator of North America. But it became extinct due to competition from '' Amphicyon'', a newcomer from Eurasia. ''Amphicyon'' bested ''Daeodon'' because the bear-dog Amphicyonidae is an extinct family of terrestr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Common Treeshrew
The common treeshrew (''Tupaia glis'') is a small mammal in the treeshrew family Tupaiidae, and is native to Thailand, Malaysia, and Indonesia. It has been listed as Least Concern by IUCN as it remains common and displays some adaptability to ongoing habitat loss. Description The common treeshrew is one of the largest among treeshrews. Average body length is between , and average weight is around 190 g, with varying colours of reddish-brown, greyish or black upper parts and whitish belly. Its long, bushy tail is dark greyish-brown and almost reaches the length of the body. The paws are bare with sharp nails, and with a naked patch of skin above its long nose. Both sexes are similar. The animal has a head and body length of 13–21 cm and a tail length of 12–20 cm. The common treeshrew usually has a white, pale stripe on each shoulder. The two subspecies are ''T. g. longipes'' and ''T. g. salatana'', with ''T. g. longipes'' being duller in color than ''T. g. salatan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Urogale
The Mindanao treeshrew (''Tupaia everetti''), also called the Philippine tree shrew, is a species of treeshrew endemic to the Mindanao region in the Philippines. It was formerly considered the only member of the genus ''Urogale'', but that genus was merged into '' Tupaia'' when the species was found to nest within the latter genus in a molecular phylogeny. The scientific name commemorates British colonial administrator and zoological collector Alfred Hart Everett. Range and habitat It is found, as its name suggests, in Mindanao, in the Philippines. It lives in rain forest and montane forest. Description It is the heaviest treeshrew, weighing about 355 g, and is terrestrial Terrestrial refers to things related to land or the planet Earth. Terrestrial may also refer to: * Terrestrial animal, an animal that lives on land opposed to living in water, or sometimes an animal that lives on or near the ground, as opposed to ....Napier JR, Napier PH. (1968) A handbook of living primates ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anathana
The Madras treeshrew (''Anathana ellioti''), also known as the Indian treeshrew, is a species of treeshrew in the monotypic genus ''Anathana'' found in the hill forests of central and southern India. The genus name is derived from the Tamil name of ''moongil anathaan'' (literally "bamboo squirrel") and the species name is after Sir Walter Elliot of the Indian Civil Services in Madras. Description This treeshrew is 16.0 to 18.5 cm long with a tail of 16.5 to 19.5 cm. The nominate race (type locality: Eastern Ghats, Madras. British Museum 50.1.21.5) has the tail coloured like the back, the ground colour above being reddish-brown while the feet and hind legs are buff or ochraceous. The other two races have the tail coloured differently from the back. The race ''A. e. pallida'' (type locality: Manbhum, Bengal, collected by Robert Cecil Beavan British Museum 66.12.28.2) has the colour of body above reddish-brown and the feet and hind legs grizzled buffy. Race ''A. e. wrou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dendrogale
''Dendrogale'' is a genus of treeshrew in the family Tupaiidae found in Southeast Asia and Borneo. It contains these species: * Bornean smooth-tailed treeshrew (''D. melanura'') * Northern smooth-tailed treeshrew (''D. murina'') References Treeshrews Mammal genera Taxa named by John Edward Gray Taxonomy articles created by Polbot {{mammal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metacone
A cusp is a pointed, projecting, or elevated feature. In animals, it is usually used to refer to raised points on the crowns of teeth. The concept is also used with regard to the leaflets of the four heart valves. The mitral valve, which has two cusps, is also known as the bicuspid valve, and the tricuspid valve has three cusps. In humans A cusp is an occlusal or incisal eminence on a tooth. Canine teeth, otherwise known as cuspids, each possess a single cusp, while premolars, otherwise known as bicuspids, possess two each. Molars normally possess either four or five cusps. In certain populations the maxillary molars, especially first molars, will possess a fifth cusp situated on the mesiolingual cusp known as the Cusp of Carabelli. Buccal Cusp- One other variation of the upper first premolar is the 'Uto-Aztecan' upper premolar. It is a bulge on the buccal cusp that is only found in Native American Indians, with highest frequencies of occurrence in Arizona. The name is no ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paracone
A paracone is a 1960s atmospheric reentry or spaceflight mission abort concept using an inflatable ballistic cone.Analysis and design of space vehicle flight control systems, Volume 16: Abort by A.L. Greensite, '''', 1969, accessed 2010-05-25. A notable feature of the paracone concept is that it facilitates an abort throughout the entire profile. Gallery [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
