Rufous elephant shrew

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Rufous elephant shrew [1]
Galegeeska rufescens zoo frankfurt.jpg
Rufous elephant shrew at the Frankfurt Zoological Garden
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Macroscelidea
Family: Macroscelididae
Genus: Galegeeska
Species:
G. rufescens
Binomial name
Galegeeska rufescens
(Peters, 1878)
Rufous Elephant Shrew area.png
Rufous elephant shrew range
Synonyms

Elephantulus rufescens

The rufous elephant shrew, rufous sengi or East African long-eared elephant-shrew (Galegeeska rufescens) is a species of elephant shrew in the family Macroscelididae. Found in Ethiopia, Kenya, Somalia, South Sudan, Tanzania and Uganda, [2] its natural habitats are dry savanna and subtropical or tropical dry shrubland. [2]

Contents

Taxonomy

Previous classified in the genus Elephantulus, a 2021 study found it to belong to the genus Galegeeska , which had been coined the previous year as a monotypic genus containing the then-rediscovered Somali elephant shrew (G. revoilii). [3] The American Society of Mammalogists has accepted these results. [4]

Distribution

Galegeeska rufescens occupies the drywood land and grassland zone of East Africa. [5]

Characteristics

Galegeeska rufescens exhibits no sexual dimorphism. The proboscis is long and flexible. The species' tails are dark-brown and can be long up to its head-to-tail length. Both adults and juveniles are similar in color. The dorsal fur is of fine texture and the coloring is brown, reddish-brown in color, or buff while the ventral fur coloring is white. The coloration of the dorsal fur is influenced by the color of the soil in which G. rufescens lives. [6] However, adults have white feet while juveniles' feet are brown. The large eye is surrounded by a white ring which is interrupted by a dark patch which extended towards the rear of the animal. The ears are large and without fur. A sternal gland is present on both males and females. The sternal gland is indicated by short, fringed white hairs. Females have three pair of teats and the males have internal testes. [7]

Ecology, diet, and behavior

Rufous elephant shrews are active throughout the day, with peaks in activity at dusk and dawn while having a midday rest. A mating male and female will build trails beneath leaf litter. The trails act as shelter and protection because the rufous elephant shrew does not build or use shelters or burrows. Throughout the trails are several rest spots for scent-marking and sunbathing. [8] Moving the forefoot laterally to push aside leaf litter and other loose debris, G. rufescens constructs and maintains trails. [9] The males usually spend most of their time cleaning the foraging trails. Except for foraging, all activities are performed in these trails. Trails act as an important means for escaping from predators. Insects form the major food resource of their diet in the dry season, while seeds are consumed during periods of rain. [5]

G. rufescens has not been observed sleeping with closed eyes, but has been observed resting with eyes partially closed for a period of 1 – 2 minutes. During these rest periods, which occur in rest spot along the trails, G. rufescens keeps their feet under their body to allow for a quick escape. This species takes flight when even the smallest noise is heard. [10]

This species is fairly monogamous; however, members of a monogamous pair spend little time together and are limited in social interaction. They live in a matriarchal society in which the female of the pair usually dominates the male. [11]

The rufous elephant shrew gives birth to one or two precocial young per litter. The female gives birth at the base of bushes or by fallen tree limbs beside the trails. She does not stay will the neonates and only nurses them in infrequently and for only a short amount of time. The neonates remain in the parental trails, expanding their familiarity of the parental territory up to 14 days after birth. If the young wander into any neighboring rufous elephant shrew trails, the residing residents chase them out of their trails. Before the next litter is born, parents chase the previous litter for the trails resulting in dispersal or death of the previous litter. [8]

Olfactory communication between young G. rufescens and their parents is achieved through apocrine glands (pedal glands) located on the underside of the young's feet. Neonates less than five days old have been observed back-rubbing one of its parents. Parents crouch down, allowing the neonates to climb on their backs and vigorously rub their four feet in the fur in a rapid vibrating motion. Cooperation between the neonates and adults is necessary or the neonates will fall off. The act of back-rubbing allows neonates to deposit pedal gland products on the fur of the parents and in turn transfer parental odors to their own fur. The mixture of the scents creates a family odor that can be used for recognizing family members. [8]

Related Research Articles

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Elephant shrews, also called jumping shrews or sengis, are small insectivorous mammals native to Africa, belonging to the family Macroscelididae, in the order Macroscelidea. Their traditional common English name "elephant shrew" comes from a perceived resemblance between their long noses and the trunk of an elephant, and their superficial similarity with shrews in the order Eulipotyphla. However, phylogenetic analysis has revealed that elephant shrews are not properly classified with true shrews, but are in fact more closely related to elephants than to shrews. In 1997, the biologist Jonathan Kingdon proposed that they instead be called "sengis", a term derived from the Bantu languages of Africa, and in 1998, they were classified into the new clade Afrotheria.

<span class="mw-page-title-main">Golden-rumped elephant shrew</span> Species of mammal

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<span class="mw-page-title-main">Northern short-tailed shrew</span> Species of mammal

The northern short-tailed shrew is the largest shrew in the genus Blarina, and occurs in the northeastern region of North America. It is a semifossorial, highly active, and voracious insectivore and is present in a variety of habitats like broadleaved and pine forests among shrubs and hedges as well as grassy river banks. It is notable in that it is one of the few venomous mammals. The specific epithet, brevicauda, is a combination of the Latin brevis and cauda, meaning "short tail".

<span class="mw-page-title-main">Eastern heather vole</span> Species of rodent

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<span class="mw-page-title-main">Black and rufous elephant shrew</span> Species of mammal

The black and rufous elephant shrew, the black and rufous sengi, or the Zanj elephant shrew is one of the 17 species of elephant shrew found only in Africa. It is native to the lowland montane and dense forests of Kenya and Tanzania. Like other members of the genus Rhynchocyon, it is a relatively large species, with adults averaging about 28 cm (11 in) in length and 450–700 g (16–25 oz) in weight.

<span class="mw-page-title-main">Montane vole</span> Species of rodent

The montane vole is a species of vole native to the western United States and Canada.

<span class="mw-page-title-main">Short-snouted elephant shrew</span> Species of mammal

The short-snouted elephant shrew or short-snouted sengi is a species of elephant shrew in the family Macroscelididae. It is found over a wide area of Africa. Its natural habitats are dry savanna and subtropical or tropical dry lowland grassland.

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

The bushveld elephant shrew or bushveld sengi is a species of elephant shrew in the family Macroscelididae. It is found in Angola, Botswana, Namibia, and South Africa. Its natural habitats are subtropical or tropical dry shrubland and hot deserts.

<span class="mw-page-title-main">Eastern rock elephant shrew</span> Species of mammal

The eastern rock elephant shrew or eastern rock sengi is a species of elephant shrew in the family Macroscelididae. It is found in Botswana, Mozambique, South Africa, and Zimbabwe. Its natural habitats are subtropical or tropical dry lowland grassland and rocky areas.

<span class="mw-page-title-main">Somali elephant shrew</span> Small animal of northeast Africa

The Somali elephant shrew or Somali sengi is a species of elephant shrew in the family Macroscelididae.

<span class="mw-page-title-main">North African elephant shrew</span> Species of mammal

The North African elephant shrew or North African sengi is a species of elephant shrew in the family Macroscelididae. It is found in Algeria, Libya, Morocco, and Tunisia, and is the only extant afrotherian within its range. The species was formerly classified in the genus Elephantulus, but molecular evidence indicates that it is more closely related to Petrodromus than to other members of Elephantulus. It was moved to a new genus, Petrosaltator, in 2016. The split with Petrodromus likely occurred during the Miocene period.

<span class="mw-page-title-main">Four-toed elephant shrew</span> Species of mammal

The four-toed elephant shrew or four-toed sengi is the only living species in the genus Petrodromus, which together with five other extant genera Rhynchocyon, Macroscelides, Petrosaltator, Galegeeska and Elephantulus constitutes the order Macroscelidea. This species is only found in particular regions in Africa and is smaller than its relatives. A comprehensive record of this species is lacking.

<i>Rhynchocyon</i> Genus of mammals

Rhynchocyon is a genus of elephant shrew in the family Macroscelididae. Members of this genus are known colloquially as the checkered elephant shrews or giant sengis. It contains the following five species:

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The grey-faced sengi is a species of elephant shrew that is endemic to the Udzungwa Mountains of south-central Tanzania. The discovery of the species was announced in January 2008; only 15 species of elephant shrew were known until then, and the last discovery was made more than 120 years ago. As the name implies, the species is characterised by a distinctive grey face and a black rump, as well as being larger than the other species of elephant shrews.

<span class="mw-page-title-main">Karoo rock elephant shrew</span> Species of mammal

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<span class="mw-page-title-main">Social monogamy in mammalian species</span> Monogamy in mammals

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<i>Galegeeska</i> Genus of elephant shrew

Galegeeska is a genus of elephant shrew in the family Macroscelididae.

References

  1. 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. 83. ISBN   978-0-8018-8221-0. OCLC   62265494.
  2. 1 2 3 Rathbun, G.B. (2015). "Elephantulus rufescens". IUCN Red List of Threatened Species . 2015: e.T42664A21289073. doi: 10.2305/IUCN.UK.2015-2.RLTS.T42664A21289073.en .
  3. Krásová, Jarmila; Mikula, Ondřej; Šumbera, Radim; Horáková, Sylvie; Robovský, Jan; Kostin, Danila S.; Martynov, Aleksey A.; Lavrenchenko, Leonid A.; Bryja, Josef (2021). "The Rufous Sengi is not Elephantulus—Multilocus reconstruction of evolutionary history of sengis from the subfamily Macroscelidinae". Journal of Zoological Systematics and Evolutionary Research. 59 (4): 918–932. doi: 10.1111/jzs.12460 . ISSN   1439-0469. S2CID   233667864.
  4. "Explore the Database". www.mammaldiversity.org. Retrieved 2021-08-19.
  5. 1 2 Neal, B. R. (1984). "Relationship between feeding habits, climate and reproduction of small mammals in Meru National Park, Kenya". African Journal of Ecology. 22 (3): 195–205. doi:10.1111/j.1365-2028.1984.tb00695.x.
  6. Koontz, F. W.; Roeper, N. J. (15 December 1983). "Elephantulus rufescens" (PDF). Mammalian Species (204): 1–5. doi:10.2307/3503972. JSTOR   3503972. S2CID   253957531 . Retrieved 4 May 2018.
  7. Fred W. Koontz & Nancy J. Koeper. "Elephantulus rufescens". The American Society of Mammalogists. Retrieved April 15, 2014.
  8. 1 2 3 Rathbun, G. B.; Redford, K. (20 August 1981). "Pedal Scent-Marking in the Rufous Elephant-Shrew, Elephantulus rufescens". Journal of Mammalogy. 62 (3): 635–637. doi:10.2307/1380414. ISSN   1545-1542. JSTOR   1380414.
  9. Koontz, F. W.; Roeper, N. J. (15 December 1983). "Elephantulus rufescens" (PDF). Mammalian Species (204): 1–5. doi:10.2307/3503972. JSTOR   3503972. S2CID   253957531 . Retrieved 4 May 2018.
  10. Koontz, F. W.; Roeper, N. J. (15 December 1983). "Elephantulus rufescens" (PDF). Mammalian Species (204): 1–5. doi:10.2307/3503972. JSTOR   3503972. S2CID   253957531 . Retrieved 4 May 2018.
  11. Lumpkin, Susan & Fred W. Koontz. (1986). "Social and Sexual Behavior of the Rufous Elephant-Shrew (Elephantulus rufescens) in Captivity". Journal of Mammalogy. 67 (1): 112–119. doi:10.2307/1381007. JSTOR   1381007.