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Kangaroo Island Emu, D. N. Baudinianus
Kangaroos are marsupials from the family Macropodidae (macropods, meaning "large foot"). In common use, the term is used to describe the largest species from this family, the red kangaroo, as well as the antilopine kangaroo, eastern grey kangaroo, and western grey kangaroo. Kangaroos are indigenous to Australia and New Guinea. The Australian government estimates that 42.8 million kangaroos lived within the commercial harvest areas of Australia in 2019, down from 53.2 million in 2013. As with the terms "wallaroo" and "wallaby", "kangaroo" refers to a paraphyletic grouping of species. All three terms refer to members of the same taxonomic family, Macropodidae, and are distinguished according to size. The largest species in the family are called "kangaroos" and the smallest are generally called "wallabies". The term "wallaroos" refers to species of an intermediate size. There are also the tree-kangaroos, another type of macropod which inhabit the upper branches of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Miocene
The Miocene ( ) is the first epoch (geology), geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and means "less recent" because it has 18% fewer modern marine invertebrates than the Pliocene has. The Miocene followed the Oligocene and preceded the Pliocene. As Earth went from the Oligocene through the Miocene and into the Pliocene, the climate slowly cooled towards a series of ice ages. The Miocene boundaries are not marked by distinct global events but by regionally defined transitions from the warmer Oligocene to the cooler Pliocene Epoch. During the Early Miocene, Afro-Arabia collided with Eurasia, severing the connection between the Mediterranean and Indian Oceans, and allowing the interchange of fauna between Eurasia and Africa, including the dispersal of proboscideans and Ape, hominoids into Eurasia. During the late Miocene, the conn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paraphyly
Paraphyly is a taxonomic term describing a grouping that consists of the grouping's last common ancestor and some but not all of its descendant lineages. The grouping is said to be paraphyletic ''with respect to'' the excluded subgroups. In contrast, a monophyletic grouping (a clade) includes a common ancestor and ''all'' of its descendants. The terms are commonly used in phylogenetics (a subfield of biology) and in the tree model of historical linguistics. Paraphyletic groups are identified by a combination of synapomorphies and symplesiomorphies. If many subgroups are missing from the named group, it is said to be polyparaphyletic. The term received currency during the debates of the 1960s and 1970s accompanying the rise of cladistics, having been coined by zoologist Willi Hennig to apply to well-known taxa like Reptilia (reptiles), which is paraphyletic with respect to birds. Reptilia contains the last common ancestor of reptiles and all descendants of that ancest ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Postnatal
The postpartum (or postnatal) period begins after childbirth and is typically considered to last for six to eight weeks. There are three distinct phases of the postnatal period; the acute phase, lasting for six to twelve hours after birth; the subacute phase, lasting six weeks; and the delayed phase, lasting up to six months. During the delayed phase, some changes to the genitourinary system take much longer to resolve and may result in conditions such as urinary incontinence. The World Health Organization (WHO) describes the postnatal period as the most critical and yet the most neglected phase in the lives of mothers and babies. Most maternal and newborn deaths occur during this period. In scientific literature, the term is commonly abbreviated to P''x'', where ''x'' is a number; for example, "day P5" should be read as "the fifth day after birth". This is not to be confused with the medical nomenclature that uses G P to stand for number and outcomes of pregnancy (gravidity ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Joey (marsupial)
Marsupials are a diverse group of mammals belonging to the infraclass Marsupialia. They are natively found in Australasia, Wallacea, and the Americas. One of marsupials' unique features is their reproductive strategy: the young are born in a relatively undeveloped state and then nurtured within a pouch on their mother's abdomen. Extant marsupials encompass many species, including Kangaroo, kangaroos, Koala, koalas, Opossum, opossums, Phalangeriformes, possums, Tasmanian devil, Tasmanian devils, Wombat, wombats, Wallaby, wallabies, and Bandicoot, bandicoots. Marsupials constitute a clade stemming from the last common ancestor of extant Metatheria, which encompasses all mammals more closely related to marsupials than to Placentalia, placentals. The evolutionary split between placentals and marsupials occurred 125-160 million years ago, in the Middle Jurassic-Early Cretaceous period. Presently, close to 70% of the 334 extant marsupial species are concentrated on the Australian ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pouch (marsupial)
The pouch is a distinguishing feature of female marsupials and monotremes, and rarely in males as well, such as in the yapokNogueira, José Carlos, et al.Morphology of the male genital system of Chironectes minimus and comparison to other didelphid marsupials. Journal of mammalogy 85.5 (2004): 834-841. and the extinct thylacine. The name marsupial is derived from the Latin ''marsupium'', meaning "pouch". This is due to the occurrence of epipubic bones, a pair of bones projecting forward from the pelvis. Marsupials give birth to a live but relatively undeveloped foetus called a joey. When the joey is born it crawls from inside the mother to the pouch. The pouch is a fold of skin with a single opening that covers the teats. Inside the pouch, the blind offspring attaches itself to one of the mother's teats and remains attached for as long as it takes to grow and develop to a juvenile stage. Variations Pouches are different amongst different marsupials, two kinds distinguish ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hind Leg
A hindlimb or back limb is one of the paired articulated appendages (limbs) attached on the caudal ( posterior) end of a terrestrial tetrapod vertebrate's torso.http://www.merriam-webster.com/medical/hind%20limb, Merriam Webster Dictionary-Hindlimb With reference to quadrupeds, the term hindleg or back leg is often used instead. In bipedal animals with an upright posture (e.g. humans and some primates), the term lower limb is often used. Location It is located on the limb of an animal. Hindlimbs are present in a large number of quadrupeds. Though it is a posterior limb, it can cause lameness in some animals. The way of walking through hindlimbs are called bipedalism. Benefits of hindlimbs Hindlimbs are helpful in many ways, some examples are: Frogs Frogs can easily adapt at the surroundings using hindlimbs. The main reason is it can jump high to easily escape to its predator and also to catch prey. It can perform some tricks using the hindlimbs such as the somersault an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Black Wallaroo
The black wallaroo (''Osphranter bernardus''), also known as Woodward's wallaroo, is a species of macropod restricted to a small, mountainous area in Arnhem Land, Northern Territory, Australia, between South Alligator River and Nabarlek. It classified as near threatened, mostly due to its limited distribution. A large proportion of the range is protected by Kakadu National Park. Taxonomy The description of the species was published by Walter Rothschild in 1904. The author initially assigned the species to a new genus as ''Dendrodorcopsis woodwardi'', but revision of new material forwarded to England by the collector John Tunney persuaded the mammalogist Oldfield Thomas that the characteristics of the taxon were assignable to '' Macropus''. The specific epithet ''woodwardi'' was preoccupied by another subspecies of the genus ('' Macropus robustus woodwardi''), prompting Rothschild to assign the new epithet ''bernardus''. In 2019, a reassessment of macropod taxonomy determin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grizzled Tree-kangaroo
The grizzled tree-kangaroo (''Dendrolagus inustus'') is a furry, long-tailed mammal native to tropical rainforests on the island of New Guinea (split between Indonesia and Papua New Guinea). Like most tree-kangaroos (genus '' Dendrolagus''), it lives in trees and eats leaves, fruit, and bark. It is a member of the macropod family Macropodidae and carries its young in a pouch like other marsupials. The tree-kangaroo is uncommon and threatened by hunting and habitat loss. It is found in foothill forests of northern and western New Guinea and is indigenous to some of the offshore islands.Flannery, T. 1995. ''Mammals of New Guinea.'' Reed Books. Description The grizzled tree-kangaroo grows to a length of about with males being considerably larger than females. It resembles a terrestrial kangaroo and its weight varies between about . The head is small, with a flat muzzle, the arms are powerful for climbing, the hind legs are long and the feet are large for an arboreal animal. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lumholtz's Tree-kangaroo
Lumholtz's tree-kangaroo (''Dendrolagus lumholtzi'') is a rare, long-tailed marsupial found in rainforests in northeastern Australia. Like most tree-kangaroos (genus ''Dendrolagus''), it lives alone in trees and feeds on plant matter. It belongs to the macropod family ( Macropodidae) with kangaroos, and carries its young in a pouch like other marsupials. It is threatened by climate change and diseases, and is found in the hilly, fertile Atherton Tableland near Cairns in north east Queensland. Name The species name ''lumholtzi'' is after the Norwegian explorer Carl Sofus Lumholtz (1851–1922), who was the first European to record a specimen in 1883. The local indigenous Dyirbal and Yidiny language name may have been either "mabi" or "mapi". Description and habitat It is the smallest of all tree-kangaroos, with males weighing an average of 7.2 kg (16 lbs) and females 5.9 kg (13 lbs). Its head and body length ranges , and its tail, . It has powerful ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dwarf Wallaby
''Dorcopsulus'' is a genus of small marsupials in the family Macropodidae, known as forest wallabies. They are native to rainforests and montane forests of New Guinea New Guinea (; Hiri Motu: ''Niu Gini''; , fossilized , also known as Papua or historically ) is the List of islands by area, world's second-largest island, with an area of . Located in Melanesia in the southwestern Pacific Ocean, the island is .... Species The genus contains the following species: * Macleay's dorcopsis (''Dorcopsulus macleayi'') * Small dorcopsis (''Dorcopsulus vanheurni'') References External links * * Macropods Marsupial genera Taxa named by Paul Matschie Taxonomy articles created by Polbot {{Diprotodont-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wallaby
A wallaby () is a small or middle-sized Macropodidae, macropod native to Australia and New Guinea, with introduced populations in New Zealand, Hawaii, the United Kingdom and other countries. They belong to the same Taxonomy (biology), taxonomic family as kangaroos and sometimes the same genus, but kangaroos are specifically categorised into the four largest species of the family. The term "wallaby" is an informal designation generally used for any macropod that is smaller than a kangaroo or a wallaroo that has not been designated otherwise. There are nine species (eight extant and one Extinction, extinct) of the brush wallaby (genus ''Notamacropus''). Their head and body length is and the tail is long. The 19 known species of Rock-wallaby, rock-wallabies (genus ''Petrogale'') live among rocks, usually near water; two species in this genus are endangered. The two living species of hare-wallabies (genus ''Lagorchestes''; two other species in this genus are extinct) are sma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Live Science
Live Science is a science news website. The publication features stories on a wide range of topics, including space, animals, health, archaeology, human behavior, and planet Earth. It also includes a reference section with links to other websites. Its stated mission is to inform and entertain readers about science and the world around them.{{r, mission History Live Science was originally made in 2004. It was acquired by ediaNetwork, later called Purch, in 2009.{{r, purch Purch consumer brands (including Live Science) were acquired by Future The future is the time after the past and present. Its arrival is considered inevitable due to the existence of time and the laws of physics. Due to the apparent nature of reality and the unavoidability of the future, everything that currently ex ... in 2018. Reception In 2011, the '' Columbia Journalism Review''{{'s "News Startups Guide" called Live Science "a purebred Web animal, primarily featuring one-off stories and photo gall ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
