Fat-tailed false antechinus

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Fat-tailed false antechinus [1]
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Infraclass: Marsupialia
Order: Dasyuromorphia
Family: Dasyuridae
Genus: Pseudantechinus
Species:
P. macdonnellensis
Binomial name
Pseudantechinus macdonnellensis
(Spencer, 1896)
Fat-tailed False Antechinus area.png
Fat-tailed false antechinus range

The fat-tailed false antechinus (Pseudantechinus macdonnellensis), also called the fat-tailed pseudantechinus and red-eared antechinus, is a member of the order Dasyuromorphia. It is an inhabitant of western and central Australia. Its species name, macdonnellensis, refers to the MacDonnell Ranges near Alice Springs, where it was first discovered.

Contents

Taxonomy

Scientific name: Pseudantechinus macdonellensis. Common name: Fat-tailed-antechinus, fat-tailed pseudantechinus. [2]

It was first described in 1896 by Sir Walter Baldwin Spencer, who placed it in the genus Phascogale . It was for a long time included in the genus Antechinus . [3] The species has formerly included the Alexandria false antechinus (P. mimulus), the Ningbing false antechinus (P. ningbing), and Woolley's false antechinus (P. woolleyae).

The P. macdonellensis is commonly found in the rocky environments of Central Australia. [4] It is presumed to have a large population, and generally lives within the confines of protected areas. Therefore, it is unlikely to decline at the rate needed to be listed as an endangered species. [2]

Description

The fat-tailed false antechinus is a medium-sized dasyurid marsupial that ranges from 18–33 g (0.63–1.16 oz), and has a life span of about seven years. [4] is 9.5-10.5 cm long with a 7.5-8.5 cm tail; it weighs 20-45g. It has a carrot-shaped tail swollen with fat which serves as a food reserve. Its fur is grey-brown. It has litters of up to six young, born in July–September (slightly later further west in the range). [5] It is an insectivorous and nocturnal species.

Habitat

The P. macdonellensis is commonly found in the rocky environments of Central Australia. [4] In addition it is found throughout South Australia, the Northern Territory and Western Australia. An outlying population in more coastal areas of Western Australia has been reclassified as a new species, Rory Cooper's false antechinus (P. roryi). The species inhabits rocky slopes and plains.

Diet

The P. macdonellensis is generally an insectivore whose diet consists of beetles, grasshoppers, and termites. A characteristic specific to this kind of species is its ability to store fat in its tail when food is plentiful. [6]

Torpor

In the winter most free ranging P. macdonellensis go into a state of torpor after midnight within the confines of rock crevices, and stay there until day breaks. In the morning, while they are still torpid, they move from the rock-crevices to basking sites exposed to the sun. Subsequently, this type of basking continues for the rest of the day. It appears that daily torpor is done in order to reduce the amount of daily expenditure by about 30%, and allows the species to live and reproduce in a challenging environment. [7] It has also been observed that the species goes into a state of torpor in circumstances in which the species finds itself under acute energetic stress. [8]

Gestation

Males and females of the subdivision P. macdonellensis reach sexual maturity at about 350 days of age. A single gestation period takes about 43 days in the females, and produces a single litter of about six. The interval in between gestation periods is about 365 days. [9]

Related Research Articles

<span class="mw-page-title-main">Dasyuridae</span> Family of marsupials

The Dasyuridae are a family of marsupials native to Australia and New Guinea, including 69 extant species divided into 21 genera. Many are small and mouse-like or shrew-like, giving some of them the name marsupial mice or marsupial shrews, but the group also includes the cat-sized quolls, as well as the Tasmanian devil. They are found in a wide range of habitats, including grassland, underground, forests, and mountains, and some species are arboreal or semiaquatic. The Dasyuridae are often called the 'marsupial carnivores', as most members of the family are insectivores.

Torpor is a state of decreased physiological activity in an animal, usually marked by a reduced body temperature and metabolic rate. Torpor enables animals to survive periods of reduced food availability. The term "torpor" can refer to the time a hibernator spends at low body temperature, lasting days to weeks, or it can refer to a period of low body temperature and metabolism lasting less than 24 hours, as in "daily torpor".

<span class="mw-page-title-main">Mulgara</span> Genus of marsupials

Mulgaras are the two 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 breed from June to September. The pouch comprises two lateral folds of skin.

<span class="mw-page-title-main">Yellow-footed antechinus</span> Species of marsupial

The yellow-footed antechinus, also known as the mardo, is a shrew-like marsupial found in Australia. One notable feature of the species is its sexual behavior. The male yellow-footed antechinus engages in such frenzied mating that its immune system becomes compromised, resulting in stress related death before it is one year old.

<i>Antechinus</i> Genus of marsupials

Antechinus is a genus of small dasyurid marsupial endemic to Australia. They resemble mice with the bristly fur of shrews.

The genus Pseudantechinus are members of the order Dasyuromorphia. They are often called false antechinuses, although this genus includes the sandstone dibbler, which was previously assigned to a different genus.

<span class="mw-page-title-main">Dasyurini</span> Tribe of marsupials

The tribe Dasyurini includes several genera of small carnivorous marsupials native to Australia: quolls, kowari, mulgara, kaluta, dibblers, neophascogales, pseudantechinuses, and the Tasmanian devil.

<span class="mw-page-title-main">Fat-tailed dunnart</span> Species of mammal

The fat-tailed dunnart is a species of mouse-like marsupial of the Dasyuridae, the family that includes the little red kaluta, quolls, and the Tasmanian devil. It has an average body length of 60–90 millimeters (2.4–3.5 in) with a tail of 45–70 millimeters (1.8–2.8 in). Ear length is 14–16 millimeters (0.55–0.63 in). One of the smallest carnivorous marsupials, its weight varies between 10–20 grams (0.35–0.71 oz). The tail becomes fat a few mm from the proximal end and remains so right up to the tip. The dunnart has trichromat vision, similar to some other marsupials as well as primates but unlike most mammals which have dichromat vision. The dunnart is often eaten by other carnivores, including invasive foxes and cats, as well as other feral animals that live among its environment.

<span class="mw-page-title-main">Stripe-faced dunnart</span> Species of marsupial

The striped-faced dunnart is a small, Australian, nocturnal, "marsupial mouse," part of the family Dasyuridae. The species' distribution occurs throughout much of inland central and northern Australia, occupying a range of arid and semi-arid habitats.

<span class="mw-page-title-main">Sandstone false antechinus</span> Species of marsupial

The sandstone false antechinus, also known as the sandstone pseudantechinus, the sandstone antechinus, the sandstone dibbler, Harney's antechinus and the Northern dibbler, is a species of small carnivorous marsupial, which has a patchy distribution in Australia's Northern Territory.

<span class="mw-page-title-main">Alexandria false antechinus</span> Species of marsupial

The Alexandria false antechinus, also known as the Carpentarian false antechinus or Carpentarian pseudantechinus, is a small carnivorous marsupial, found only in a number of small, isolated localities in northern Australia. It is the smallest and rarest of the false antechinuses.

<span class="mw-page-title-main">Ningbing false antechinus</span> Species of marsupial

The Ningbing false antechinus, also known as the Ningbing pseudantechinus, is a small species of carnivorous marsupial found in north-western Australia. It is locally common throughout the Kimberley region of Western Australia and the Northern Territory.

<span class="mw-page-title-main">Woolley's false antechinus</span> Species of marsupial

Woolley's false antechinus, also known as Woolley's pseudantechinus, is a species of small carnivorous marsupial belonging to the family Dasyuridae. It is found in the Australian state of Western Australia, primarily in the Pilbara, Ashburton and Murchison regions.

<span class="mw-page-title-main">Rory Cooper's false antechinus</span> Species of marsupial

Rory Cooper's false antechinus, also known as the tan false antechinus and the tan pseudantechinus, is a recently named species of small carnivorous marsupial which inhabits rocky outcrops in Western Australia. Nothing is known of its behaviour but it is expected that this will be similar to other members of the false antechinus genus. A study published in 2017 found no support for separation as a new species of Pseudantechinus, and the name was proposed to be synonymous with the previously described Pseudantechinus macdonnellensis.

<span class="mw-page-title-main">Paucident planigale</span> Species of marsupial

The paucident planigale, also known as Giles' planigale, is a very small species of carnivorous marsupial of the family Dasyuridae.

<span class="mw-page-title-main">Brush-tailed mulgara</span> Species of marsupial

The brush-tailed mulgara, previously the mulgara Dasycercus cristicauda is a medium sized carnivorous Australian marsupial species weighing approximately 100 g (3.5 oz). The brush-tailed mulgara is sexually dimorphic with males being much larger than females. Their body length is 12 to 17 cm, and tail length is 6–10 cm (2.4–3.9 in). They store fat in their tail which at times can be over 16 mm (0.63 in) wide at the base.

Patricia Woolley is Australian zoologist recognised for her work with marsupials, specifically the dasyurid family. Pseudantechinus woolleyae is named for her.

References

  1. Groves, C. P. (2005). Wilson, D. E.; Reeder, D. M. (eds.). Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Baltimore: Johns Hopkins University Press. p. 27. ISBN   0-801-88221-4. OCLC   62265494.
  2. 1 2 3 Woinarski, J.; Burbidge, A.; van Weenen, J.; Dickman, C. (2016). "Pseudantechinus macdonnellensis". IUCN Red List of Threatened Species . 2016: e.T40537A21945598. doi: 10.2305/IUCN.UK.2016-2.RLTS.T40537A21945598.en . Retrieved 12 November 2021.
  3. Woolley, P.A. (1995). "Fat-tailed Pseudantechinus". In Strahan, Ronald (ed.). The Mammals of Australia. Reed Books. pp. 76–77.
  4. 1 2 3 Burwell, C. J.; Geiser, F.; Barritt, M.; May, K.; Pavey, C. R. (19 March 2005). "Additional records of prey of the fat-tailed false antechinus Pseudantechinus macdonnellensis from central Australia". Australian Mammalogy. 27 (2): 227–229. doi:10.1071/am05227 . Retrieved 19 March 2022.
  5. Menkhorst, Peter (2001). A Field Guide to the Mammals of Australia. Oxford University Press. p. 60.
  6. "Fat-tailed False Antechinus (Pseudantechinus macdonnelliensis)". Ozanimals.com.
  7. Geiser, Fritz; Pavey, Chris R. (2007). "Basking and torpor in a rock-dwelling desert marsupial: survival strategies in a resource-poor environment". Journal of Comparative Physiology B. 177 (8): 885–892. doi:10.1007/s00360-007-0186-z. PMID   17674010. S2CID   22794975.
  8. Körtner, G; Geiser, F (2009). "The key to winter survival: daily torpor in a small arid-zone marsupial". Naturwissenschaften. 96 (4): 525–530. doi:10.1007/s00114-008-0492-7. PMID   19082573. S2CID   3093539.
  9. "Fat-tailed pseudantechinus | Pseudantechinus macdonnellensis facts". Thewebsiteofeverything.com.