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Northern Mulgara
The northern mulgara (''Dasycercus woolleyae'') is a newly described, and potentially extinct, species of mulgara. The species is named after Dr. Patricia Woolley who previously worked on the genus ''Dasycercus,'' and has worked extensively with Australian dasyurids. Description The northern mulgara is externally very similar to the brush-tailed mulgara, with some individuals displaying the signature brushed tail. However, some individuals of the northern mulgara has also been observed with a crested tail, indicated that the character is polymorphic. Distribution Museum specimens of the northern mulgara have been collected in the Tanami Desert, Simpson Desert, Gibson Desert, and Great Sandy Desert. A large collection of specimens are from the Otto Lipfert Canning Stock Route expeditions in 1930-1931. Here the northern mulgara (at the time believed to be the crest-tailed mulgara) and the brush-tailed mulgara were observed living in sympatry In biology, two closely relat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extinction
Extinction is the termination of an organism by the death of its Endling, last member. A taxon may become Functional extinction, functionally extinct before the death of its last member if it loses the capacity to Reproduction, reproduce and recover. As a species' potential Range (biology), range may be very large, determining this moment is difficult, and is usually done retrospectively. This difficulty leads to phenomena such as Lazarus taxon, Lazarus taxa, where a species presumed extinct abruptly "reappears" (typically in the Fossil, fossil record) after a period of apparent absence. Over five billion species are estimated to have died out. It is estimated that there are currently around 8.7 million species of eukaryotes globally, possibly many times more if microorganisms are included. Notable extinct animal species include Dinosaur, non-avian dinosaurs, Machairodontinae, saber-toothed cats, and mammoths. Through evolution, species arise through the process of specia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gibson Desert
The Gibson Desert is a large desert in Western Australia, largely in an almost pristine state. It is about in size, making it the fifth largest desert in Australia, after the Great Victoria, Great Sandy, Tanami and Simpson deserts. The Gibson Desert is both an interim Australian bioregion and desert ecoregion. Location and description The Gibson Desert is located between the saline Kumpupintil Lake and Lake Macdonald along the Tropic of Capricorn, south of the Great Sandy Desert, east of the Little Sandy Desert, and north of the Great Victoria Desert. The altitude rises to just above in places. As noted by early Australian explorers such as Ernest Giles large portions of the desert are characterized by gravel-covered terrains covered in thin desert grasses and it also contains extensive areas of undulating red sand plains and dunefields, low rocky/gravelly ridges and substantial upland portions with a high degree of laterite formation. The sandy soil of the lateri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dasyuromorphs
Dasyuromorphia (, meaning "hairy tail" in Greek) is an order comprising most of the Australian carnivorous marsupials, including quolls, dunnarts, the numbat, the Tasmanian devil, and the extinct thylacine. In Australia, the exceptions include the omnivorous bandicoots (order Peramelemorphia) and the marsupial moles (which are insectivorous but are very different and are now accorded an order of their own, Notoryctemorphia). Numerous South American species of marsupials (orders Didelphimorphia, Paucituberculata, and Microbiotheria) are also carnivorous, as were some extinct members of the order Diprotodontia, including extinct kangaroos (such as '' Ekaltadeta'' and '' Propleopus)'' and thylacoleonids, and some members of the partially extinct clade Metatheria and all members of the extinct superorder Sparassodonta. The order contains four families: one, the Myrmecobiidae, with just a single living species (the numbat), two with only extinct species (including the thy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sympatry
In biology, two closely related species or populations are considered sympatric when they exist in the same geographic area and thus frequently encounter each other. An initially interbreeding population that splits into two or more distinct species sharing a common range exemplifies sympatric speciation. Such speciation may be a product of reproductive isolation – which prevents hybrid offspring from being viable or able to reproduce, thereby reducing gene flow – that results in genetic divergence. Sympatric speciation may, but need not, arise through secondary contact, which refers to speciation or divergence in allopatry followed by range expansions leading to an area of sympatry. Sympatric species or taxa in secondary contact may or may not interbreed. Types of populations Four main types of population pairs exist in nature. Sympatric populations (or species) contrast with parapatric populations, which contact one another in adjacent but not shared ranges and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crest-tailed Mulgara
The crest-tailed mulgara (''Dasycercus cristicauda'') is a small to medium-sized Australian carnivorous marsupial and a member of the family Dasyuridae (meaning "hairy tail") which includes quolls, dunnarts, numbats, the endangered Tasmanian devil and the extinct thylacine. The crest-tailed mulgara is among a group of native predatory mammals or mesopredators endemic to arid Australia.Pavey, C. R., Nano, C. E. M., Cooper, S. J. B., Cole, J. R., & McDonald, P. J. (2012). Habitat use, population dynamics and species identification of mulgara, Dasycercus blythi and D. cristicauda, in a zone of sympatry in central Australia. ''Australian Journal of Zoology'', 59(3), 156-169. Description The crest-tailed mulgara is a small to medium-sized mammal with sandy coloured fur on the upper parts leading to a darker grey on the under parts and inner limbs.Woolley, P.A. (2005). The species of ''Dasycercus'' Peters, 1875 (Marsupialia: Dasyuridae). ''Memoirs of Museum Victoria, 62''(2), 213 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canning Stock Route
The Canning Stock Route is a track that runs from Halls Creek, Western Australia, Halls Creek in the Kimberley (Western Australia), Kimberley region of Western Australia to Wiluna, Western Australia, Wiluna in the Mid West (Western Australia), mid-west region. With a total distance of around 1,850 km (1,150 mi) it is claimed to be the longest historic stock route in the world. A 1928 Royal Commission into the price of beef in Western Australia led to the repair of the wells and the re-opening of the stock route. Around 20 droves took place between 1931 and 1959 when the final droving run was completed. The Canning Stock Route is now a popular but challenging four-wheel drive trek typically taking 10 to 20 days to complete. A few adventurers have traversed the track on foot, by bicycle, motorcycle and in two-wheel drive vehicles. There are two small settlements on the track where fuel and other supplies may be obtained; Kunawarritji Community, Western Australia, Kuna ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Otto Lipfert
Otto is a masculine German given name and a surname. It originates as an Old High German short form (variants ''Audo'', ''Odo'', '' Udo'') of Germanic names beginning in ''aud-'', an element meaning "wealth, prosperity". The name is recorded from the 7th century ( Odo, son of Uro, courtier of Sigebert III). It was the name of three 10th-century German kings, the first of whom was Otto I the Great, the first Holy Roman Emperor, founder of the Ottonian dynasty. The Gothic form of the prefix was ''auda-'' (as in e.g. '' Audaþius''), the Anglo-Saxon form was ''ead-'' (as in e.g. '' Eadmund''), and the Old Norse form was '' auð-''. Due to Otto von Bismarck, the given name ''Otto'' was strongly associated with the German Empire in the later 19th century. It was comparatively frequently given in the United States (presumably in German American families) during the 1880s to 1890s, remaining in the top 100 most popular masculine given names in the US throughout 1880–1898, but its ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Great Sandy Desert
The Great Sandy Desert is an interim Australian bioregion,IBRA Version 6.1 data located in the northeast of straddling the and southern regions and extending east into the . It is the second largest desert in Australia after the |
Simpson Desert
The Simpson Desert is a large area of dry, red sandy plain and dunes in the Northern Territory, South Australia and Queensland in central Australia. It is the fourth-largest Deserts of Australia, Australian desert, with an area of . The Wangkangurru Yarluyandi people know this area as Munga-Thirri. The desert is underlain by the Great Artesian Basin, one of the largest inland drainage areas in the world. Water from the basin rises to the surface at numerous natural springs, including Dalhousie Springs, and at Water well, bores drilled along stock routes, or during petroleum exploration. As a result of exploitation by such bores, the flow of water to springs has been steadily decreasing in recent years. It is also part of the Lake Eyre basin. The Simpson Desert is an erg (landform), erg that contains the world's longest parallel sand dunes. These north-south oriented dunes are static, held in position by vegetation. They vary in height from in the west to around on the easter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mulgara
Mulgaras are the six small rat-sized species in the genus ''Dasycercus''. They are marsupial carnivores, closely related to the Tasmanian devil and the quolls, that live in deserts and spinifex grasslands of arid Australia. They are nocturnal, but occasionally "sunbathe" in the entrance of the burrow in which they dwell. Their kidneys are highly developed to excrete extremely concentrated urine to preserve water, as the animals rarely drink. They feed mostly on insects, but also eat reptiles and small mammals. They are seasonal breeders and breed from June to September. The pouch comprises two lateral folds of skin. Traditionally, two distinct but very similar species were recognized. The brush-tailed mulgara (''D. blythi'', previously classified as ''D. cristicauda''), has an uncrested tail, two upper premolars, and six nipples. The crest-tailed mulgara (previously ''D. hillieri'', but now reclassified as ''D. cristicauda'') has a crested tail, three upper premolars, and eigh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tanami Desert
The Tanami Desert () is a desert in northern Australia, situated in the Northern Territory and Western Australia. It has a rocky terrain and small hills. The Tanami was the Northern Territory's final frontier and was not fully explored by Australians of European descent until well into the twentieth century. It is traversed by the Tanami Track. The name ''Tanami'' is thought to be an anglicisation Anglicisation or anglicization is a form of cultural assimilation whereby something non-English becomes assimilated into or influenced by the culture of England. It can be sociocultural, in which a non-English place adopts the English language ... of the Warlpiri name for the area, "Chanamee", meaning "never die". This referred to certain rock holes in the desert which were said never to run dry. Under the name Tanami, the desert is classified as an interim Australian bioregion, comprising . [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polymorphism (biology)
In biology, polymorphism is the occurrence of two or more clearly different morphs or forms, also referred to as alternative '' phenotypes'', in the population of a species. To be classified as such, morphs must occupy the same habitat at the same time and belong to a panmictic population (one with random mating). Ford E.B. 1965. ''Genetic polymorphism''. Faber & Faber, London. Put simply, polymorphism is when there are two or more possibilities of a trait on a gene. For example, there is more than one possible trait in terms of a jaguar's skin colouring; they can be light morph or dark morph. Due to having more than one possible variation for this gene, it is termed 'polymorphism'. However, if the jaguar has only one possible trait for that gene, it would be termed "monomorphic". For example, if there was only one possible skin colour that a jaguar could have, it would be termed monomorphic. The term polyphenism can be used to clarify that the different forms arise from the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
