Large-eared tenrec

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Large-eared tenrec [1]
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Afrosoricida
Suborder: Tenrecomorpha
Family: Tenrecidae
Subfamily: Geogalinae
Genus: Geogale
A. Milne-Edwards & A. Grandidier, 1872
Species:
G. aurita
Binomial name
Geogale aurita
Geogale aurita range map.svg
Large-eared tenrec range

The large-eared tenrec (Geogale aurita) is a species of mammal in the family Tenrecidae. It is the only species in the monotypic genus Geogale, and the only member of the subfamily Geogalinae. [1] It is endemic to Madagascar where its natural habitats are subtropical or tropical dry forests and shrubland. It is threatened by habitat loss, but to a lesser extent than was previously thought and is listed by the IUCN as being of "Least Concern".

Contents

Geogale is thought to have split from the ancestors of its sister clade, the subfamily Oryzorictinae, about 30 million years ago. [3]

Description

The large-eared tenrec is a small shrew-like animal with short, soft fur, a long hairy tail and large projecting ears. Adults weigh between 5 and 8 grams (0.18 and 0.28 oz) and measure 60 to 75 millimetres (2.4 to 3.0 in) in length, with a tail half as long again. The dorsal (upper) surface is greyish brown or reddish brown and the ventral (under) surface is buffish white. [4] The large-eared tenrec differs from other tenrecs in the family by having 34 teeth instead of 36. It is also unique within the family in that females come into oestrus while they are lactating and so are able to be carrying one litter while still feeding another. [4]

Behaviour

The large-eared tenrec feeds on insects, particularly termites which it locates by sound. It is itself preyed on by several predators including the barn owl (Tyto alba), the Madagascar owl (Asio madagascariensis), the Malagasy cat-eye snake (Madagascarophis colubrinus) and the narrow-striped mongoose (Mungotictis decemlineata). [4]

The large-eared tenrec has a low metabolic rate and is heterothermic. This means that its body temperature fluctuates with the surrounding environment, although pregnant and lactating females may maintain a more steady, higher temperature. [4] The animals are often torpid in the heat of the day, hiding in concealed locations such as hollow logs or holes. [4] Reproduction has been little studied in this species, but the breeding season is between September and March. It is known that development can be arrested temporarily and the gestation period may vary between about 54 and 69 days. A litter consists of up to five blind, deaf and helpless young and these are weaned when between 21 and 33 days old, soon after their eyes have opened. [4]

Status

The large-eared tenrec is listed by the IUCN in its Red List of Threatened Species as being of "Least Concern". The population trend is unknown and although this tenrec has been recorded in various scattered areas of Madagascar, it is a small, inconspicuous animal and is likely to also be present in intervening locations. It had been thought to be restricted to dry deciduous forest but it has now also been found in grassland and is probably more resilient to disturbed habitat than had previously been realised. Some of the areas in which it occurs are in national parks and nature reserves. [2]

See also

Related Research Articles

<span class="mw-page-title-main">Afrosoricida</span> Order of mammals

The clade Afrosoricida contains the golden moles of Southern Africa, the otter shrews of equatorial Africa and the tenrecs of Madagascar. These three groups of small mammals were for most of the 19th and 20th centuries regarded as a part of the Insectivora or Lipotyphla, but both of those groups, as traditionally used, are polyphyletic.

<span class="mw-page-title-main">Tenrec</span> Family of small mammals

A tenrec is a mammal belonging to any species within the afrotherian family Tenrecidae, which is endemic to Madagascar. Tenrecs are a very diverse group; as a result of convergent evolution, some resemble hedgehogs, shrews, opossums, rats, and mice. They occupy aquatic, arboreal, terrestrial, and fossorial environments. Some of these species, including the greater hedgehog tenrec, can be found in the Madagascar dry deciduous forests. However, the speciation rate in this group has been higher in humid forests.

<span class="mw-page-title-main">Web-footed tenrec</span> Species of mammal

The web-footed tenrec, Malagasy otter shrew, or aquatic tenrec is the only known semiaquatic tenrec, and is found in eastern Madagascar, especially in and around Ranomafana National Park. It grows to between 25 and 39 cm, and was once thought to be extinct. It feeds on crabs, aquatic insects, and crayfish. The population is considered vulnerable. It was formerly placed in the monotypic genus Limnogale, but has been moved to Microgale based on molecular data showing it to be deeply nested within the latter.

<span class="mw-page-title-main">Tailless tenrec</span> Species of mammal

The tailless tenrec, also known as the common tenrec, is a species of mammal in the family Tenrecidae. It is the only member of the genus Tenrec. Native to Madagascar, it is also found on the Comoros, Mauritius, Réunion, and Seychelles island groups, where it has been purposely introduced. Its natural habitat is the understory of subtropical-tropical forest, open forest, arid shrub-land, savanna, arable land, pastures, crop plantations, private gardens, and some landscaped, urban areas.

<span class="mw-page-title-main">Cowan's shrew tenrec</span> Species of mammal

Cowan's shrew tenrec is a species of mammal in the family Tenrecidae.

<span class="mw-page-title-main">Dobson's shrew tenrec</span> Species of mammal

Dobson's shrew tenrec is a species of mammal in the family Tenrecidae. It is endemic to Madagascar. Its natural habitats are subtropical or tropical moist forests, plantations, and heavily degraded former forest. On the basis of molecular data indicating that it and Talazac's shrew tenrec form a sister group to the rest of Microgale, these two species were transferred from Microgale to Nesogale in 2016.

<span class="mw-page-title-main">Dryad shrew tenrec</span> Species of mammal

The dryad shrew tenrec, also known as the tree shrew tenrec, is a species of mammal in the family Tenrecidae. It is endemic to Madagascar. Its natural habitat is subtropical or tropical moist lowland forests.

<span class="mw-page-title-main">Pale shrew tenrec</span> Species of mammal

The pale shrew tenrec, also known as the pale-footed shrew tenrec is a species of mammal in the family Tenrecidae. It is endemic to Madagascar. Its natural habitats are subtropical and tropical moist lowland and montane forests.

<span class="mw-page-title-main">Gracile shrew tenrec</span> Species of mammal

The gracile shrew tenrec is a species of mammal in the family Tenrecidae. It is endemic to Madagascar. Its natural habitat is subtropical or tropical moist montane forests.

<span class="mw-page-title-main">Jenkins's shrew tenrec</span> Species of mammal

Jenkins's shrew tenrec is a species of mammal in the family Tenrecidae. It is endemic to Madagascar. Its natural habitats are subtropical or tropical dry forests and shrubland. It is threatened by habitat loss.

<span class="mw-page-title-main">Lesser long-tailed shrew tenrec</span> Species of mammal

The lesser long-tailed shrew tenrec is a species of mammal in the family Tenrecidae. It is active at all hours of the day and night, but each individual maintains its own pattern of rest and activity.

<span class="mw-page-title-main">Major's long-tailed tenrec</span> Species of mammal

Major's long-tailed tenrec is a species of mammal in the family Tenrecidae. It is endemic to Madagascar. Its natural habitat is the eastern humid forest of the island, as well as some western forests, where it has been seen at elevations from 785 to 2000 m. Its habits are not well known, but it is thought to be semiarboreal. The species was formerly viewed as synonymous with M. longicaudata. It was named in honor of zoologist C. I. Forsyth Major.

<span class="mw-page-title-main">Montane shrew tenrec</span> Species of mammal

The montane shrew tenrec is a species of mammal in the family Tenrecidae. It is endemic to Madagascar. Its natural habitat is subtropical or tropical moist montane forests.

<span class="mw-page-title-main">Greater long-tailed shrew tenrec</span> Species of mammal

The greater long-tailed shrew tenrec is a species of mammal in the family Tenrecidae. It is endemic to Madagascar, where its natural habitats are subtropical or tropical moist forests.

<span class="mw-page-title-main">Talazac's shrew tenrec</span> Species of mammal

Talazac's shrew tenrec is a species of mammal in the family Tenrecidae. It is endemic to Madagascar. Its natural habitats are subtropical or tropical moist forests. On the basis of molecular data indicating that it and Dobson's shrew tenrec form a sister group to the rest of Microgale, these two species were transferred from Microgale to Nesogale in 2016.

<span class="mw-page-title-main">Thomas's shrew tenrec</span> Species of mammal

Thomas's shrew tenrec is a species of mammal in the family Tenrecidae. It is endemic to Madagascar. Its natural habitat is subtropical or tropical moist lowland forests.

<span class="mw-page-title-main">Mole-like rice tenrec</span> Animal species belonging to Tenrecidae family

The mole-like rice tenrec, also known as the fossorial tenrec or hova rice tenrec, is a species of mammal in the tenrec family. Like all other tenrecs, it is endemic to Madagascar. Its natural habitats are subtropical or tropical moist forests, swamps, freshwater lakes, and irrigated or seasonally flooded agricultural land.

<span class="mw-page-title-main">Oryzorictinae</span> Subfamily of mammals

Oryzorictinae is a subfamily of tenrecs endemic to the island of Madagascar. It is the largest of three tenrec subfamilies. Oryzorictinae is thought to have split from the lineage of its closest relative, Geogale, about 30 million years (Ma) ago. The deepest phylogenetic split within the subfamily, that between Oryzorictes and a clade composed of Microgale plus Nesogale, is thought to have occurred about 28 Ma ago. In turn, Microgale and Nesogale are thought to have diverged about 19 Ma ago.

<span class="mw-page-title-main">Tenrecinae</span> Subfamily of mammals

Tenrecinae is a tenrec subfamily endemic to the island of Madagascar. It contains the largest species in the family, Tenrec ecaudatus. All members of the genus possess spines, analogous to those of hedgehogs, for defense against predators.

References

  1. 1 2 Bronner, G.N.; Jenkins, P.D. (2005). "Order Afrosoricida". In Wilson, D.E.; Reeder, D.M (eds.). Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Johns Hopkins University Press. p. 72. ISBN   978-0-8018-8221-0. OCLC   62265494.
  2. 1 2 Stephenson, P.J.; Soarimalala, V.; Goodman, S. (2016). "Geogale aurita". IUCN Red List of Threatened Species . 2016: e.T9048A97188944. doi: 10.2305/IUCN.UK.2016-1.RLTS.T9048A97188944.en . Retrieved 16 November 2021.
  3. Everson, K. M.; Soarimalala, V.; Goodman, S. M.; Olson, L. E. (2016). "Multiple Loci and Complete Taxonomic Sampling Resolve the Phylogeny and Biogeographic History of Tenrecs (Mammalia: Tenrecidae) and Reveal Higher Speciation Rates in Madagascar's Humid Forests". Systematic Biology. 65 (5): 890–909. doi: 10.1093/sysbio/syw034 . PMID   27103169.
  4. 1 2 3 4 5 6 Nielsen, Thomas (2005). "Geogale aurita". Animal Diversity Web. University of Michigan. Retrieved 2013-09-28.