Rough-haired golden mole

Last updated

Rough-haired golden mole [1]
Chrysospalax villosus Smith 1849.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Afrosoricida
Family: Chrysochloridae
Genus: Chrysospalax
Species:
C. villosus
Binomial name
Chrysospalax villosus
(A. Smith, 1833)
Subspecies

Chrysospalax villosus dobsoni
Chrysospalax villosus leschae
Chrysospalax villosus rufopallidus
Chrysospalax villosus rufus
Chyrsospalax villosus transvaalensis
Chrysospalax villosus villosus

Contents

Rough-haired Golden Mole area.png
Rough-haired golden mole range

The rough-haired golden mole (Chrysospalax villosus) is a species of mammal that live mostly below ground. They have shiny coats of dense fur and a streamlined, formless appearance. They have no visible eyes or ears; in fact, they are blind - the small eyes are covered with hairy skin. The ears are small and are hidden in the animal's fur. [3]

Physical description

The rough-haired golden mole is generally larger than most of the other species of golden mole, with a total length of 120–175 millimetres (4.7–6.9 in) and a mass of 90–160 grams (3.2–5.6 oz). In the Transvaal region which is associated with land north of modern-day Vaal river in South Africa, males had an average mass of 105 grams (3.7 oz) while females had a range of mass from 65 to 142 grams (2.3 to 5.0 oz). It characteristically has a coarse and long pelage [3] with hairs 18–20 millimetres (0.71–0.79 in) long on the back. The glossy individual hairs of the guard coat on the mid-back are slate-grey at the base with reddish brown to brown at the tip. The under fur is woolly and grey. The claws of the third digit on the front feet are powerful and about 1.6 centimetres (0.63 in) in length and 4 millimetres (0.16 in) across at the base. [3]

Historic distribution

Its natural habitats are temperate grasslands, arable land, pastureland, plantations, rural gardens, and urban areas. [2] Historically throughout Africa it was found scattered throughout the Eastern Cape, KwaZulu-Natal, Gauteng and Mpumalanga. [3] One particular historical site for the mole has been completely transformed by urbanization, the greater Pretoria West region of Gauteng which consists of grasslands where extensive searches for this species over the last 10 years have not yielded any sign of their presence. The Gauteng, KwaZulu Natal and Mpumulanga provincial conservation departments are currently attempting to document and record potential habitat sites that may support rough-haired golden mole populations. There is major concern by these bodies that this mammal may be more threatened than its red list status suggests. The rareness of the species is exemplified by the fact that the capture of one individual in the Glengary region of KwaZulu-Natal in 2003 was the first specimen recorded since 1974, nearly 30 years ago.

Natural distribution

The rough-haired golden mole (Chrysospalax villosus), endemic to South Africa, has a distribution that is characteristically disjunct with records from a number of provinces including the Eastern Cape, KwaZulu Natal, Gauteng and Mpumalanga. Recorded from the extreme eastern parts of the Cape Province through southern and central Kwazulu-Natal to the south-eastern Gauteng.

Habitat requirements

It frequents grasslands and meadows in the savanna and grassland biomes of South Africa, and is extremely secretive. Detecting the presence of rough-haired golden moles is made all the more difficult by their preference for areas with sandy soils and dense vegetation, normally close to water sources. They have a preference for the use of dry ground on the fringes of marshes or damp veils. Possibly for the ease of excavating invertebrates such as worms. They do not make subsurface runs like other golden moles, but excavate burrows, the entrances to which are characterized by loose piles of soil thrown up at the sides and back and which are left open when they leave the burrows to forage. [3] Roberts (1951) thought solitary moles lived in chambers within their burrow systems from which they emerge only after rain. From the entrances, through repeated use, tracks are formed to feeding areas, which are marked by the disturbance of the soil in rooting with the horny pad on their noses. If suddenly alarmed when out of the burrows they quickly return to their shelter. In captivity, Roberts (1951) noted that, irrespective of the direction in which they faced, when they were disturbed their reactions were so rapid and the location of the burrow entrance apparently so well known that it was difficult to follow them as they sought refuge within it.

Behavior & social organization

The rough-haired and giant golden moles live in chambers and passages in mounds reached by a system of tunnels made in part by the golden moles and in part by mole-rats. They are generally solitary and territorial and have been known to fight with competing moles. Their burrow systems open to the surface via a number of ovoid holes that resemble the holes of freshwater crab chambers. These openings often are filled with shallow soil tailings (soil that has been displaced to the side and back), also similar to those of crabs; sometimes a shallow depression is also found at the burrow entrance, and possibly serves as a latrine. The telltale indicators of rough-haired golden moles are rootings made by the leathery nose pad during nocturnal surface foraging bouts. These signs resemble a scuff made by the edge of the heel of a shoe that has been dug superficially into the soil and are usually located very close to the open holes. In wet soils the imprint of their feet can sometimes also be seen. Surface foraging and activity usually follows a period of rainfall. It is not known if these moles also forage in tunnels like other golden moles, but this seems likely given the long periods without rainfall during the dry winter months throughout most of its range.

Feeding and foraging

The rough-haired golden mole sometimes feeds above ground, and, when it does, it roots about like a pig in search of worms and insects. It walks at night to foraging sites that are recognizable by the disturbed soil where these golden moles have rooted for insects with their horny nose pads. They have a pair of bones, called tabulars, in the occipital area of the skull, which are not found in other mammals. The zygomatic arches are formed by elongations of the maxillae. The malleus is tremendously enlarged, and it has been suggested that this actually aids hearing underground (that is, the detection of ground-born vibrations). The diet comprises insects and earthworms but has not been well documented. It is possible that they are generalists that will take any invertebrate or even small vertebrate prey they come across, as is the case with the giant golden mole, Chrysospalax tervelyani.

Adaptations to adverse environment

If disturbed when on the surface, rough-haired golden moles quickly retreat back to the safety of the nearest burrow, and they apparently have a remarkable ability to retrace their steps even under the cover of darkness.

Threats and conservation

The distribution of this golden mole has probably contracted during historical times as a result of habitat alteration associated with mining, power generating plants, as well as urbanization and ecologically unsound agricultural practices in parts of its range. The greatest degradation of its preferred habitat has taken place in the Highveld grasslands of Mpumalanga and Gauteng, as a result of mining shallow coal deposits to fuel the numerous coal fired power stations in this region. Rehabilitation of these sites has largely been ineffective in Afrotherian Conservation Number 3(April 2005) restoring natural plant and animal communities. These power stations form the backbone of South Africa’s electricity network, so the magnitude of disturbance is likely to increase as human populations grow and the demand for power increases.

Continual habitat destruction, alteration and human disturbances will result in the disappearance of the majority of sensitive or secretive species. Limited suitable grasslands and seasonal wetland areas remain in the Gauteng Province, especially in the Benoni area. It must be stressed however that the above-mentioned species are extremely difficult to observe and more intensive surveys are required in order to ascertain their current conservation status in the Gauteng Province. No evidence of any of the above-mentioned threatened mammals, although suitable habitat occurs for hedgehogs as well as Rough-haired Golden Moles (seasonally inundated grass and sedge zone).

Reproduction

Very little information is known about this aspect of their life history. Roberts (1951) recorded a female with two fetuses but gave no date of recovery of specimen.

Related Research Articles

<span class="mw-page-title-main">Drakensberg</span> Mountain range in South Africa

The Drakensberg is the eastern portion of the Great Escarpment, which encloses the central Southern African plateau. The Great Escarpment reaches its greatest elevation – 2,000 to 3,482 metres within the border region of South Africa and Lesotho.

<span class="mw-page-title-main">Golden mole</span> Monotypic family of mammals

Golden moles are small insectivorous burrowing mammals endemic to Sub-Saharan Africa. They comprise the family Chrysochloridae and as such they are taxonomically distinct from the true moles, family Talpidae, and other mole-like families, all of which, to various degrees, they resemble as a result of evolutionary convergence. There are 21 species. Some are relatively common, whereas others are rare and endangered.

<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">Highveld</span> Geographic region of the South African inland plateau

The Highveld is the portion of the South African inland plateau which has an altitude above roughly 1500 m, but below 2100 m, thus excluding the Lesotho mountain regions to the south-east of the Highveld. It is home to some of the country's most important commercial farming areas, as well as its largest concentration of metropolitan centres, especially the Gauteng conurbation, which accommodates one-third of South Africa's population.

<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">Juliana's golden mole</span> Species of mammal

Juliana's golden mole is a golden mole endemic to South Africa. It is listed as an endangered species due to habitat loss and a restricted range. Golden moles are an ancient group of mammals that live mostly below ground. The eponymous Juliana is Juliana Meester, the wife of the South African zoologist who named this species.

<span class="mw-page-title-main">Cape golden mole</span> Species of mammal

The Cape golden mole is a small, insectivorous mammal of the family Chrysochloridae, the golden moles. The species is a solitary subterranean insectivore, confined to the coastal regions of the southwestern and southern Cape in South Africa. When foraging for small, soil invertebrates and small lizards, these golden moles excavate superficial burrows using their conical nose shield and highly modified forefeet. Females are smaller than males. Golden moles have very dense, soft, and silky coats. The coats are colored blackish to slaty-grey and brown to pale fawn. They have also been observed to venture onto sandy beaches, presumably to feed on amphipods and isopods occurring there.

<span class="mw-page-title-main">Cape mole-rat</span> Species of rodent

The Cape mole-rat is a species of mole-rat endemic to South Africa. It is the only extant species currently described as belonging to the genus Georychus.

<span class="mw-page-title-main">Gunning's golden mole</span> Species of mammal

Gunning's golden mole is a small mammal endemic to South Africa. It was listed in 2006 as an endangered species. Its decreasing numbers are due to habitat clearance or destruction and predation from domesticated cats and dogs. It is a burrowing animal and spends the majority of its time underground.

<span class="mw-page-title-main">Giant golden mole</span> Species of mammal

The giant golden mole is a small mammal found in Africa. At 23 centimetres (9.1 in) in length, it is the largest of the golden mole species. This mole has dark, glossy brown fur; the name golden comes from the Greek word for green-gold, the family Chrysochloridae name.

<span class="mw-page-title-main">Sloggett's vlei rat</span> Species of rodent

Sloggett's vlei rat or ice rat is a species of rodent in the family Muridae. It is found in southern Lesotho and South Africa where its natural habitats are subtropical or tropical high-altitude grassland, swamps, and rocky areas. Its name commemorates Col. Arthur Sloggett who served in South Africa and collected at Deelfontein in 1902. This is a common species and the International Union for Conservation of Nature has rated it as being of "least concern".

<i>Amblysomus</i> Genus of mammals

Amblysomus is a genus of the golden mole family, Chrysochloridae, comprising five species of the small, insect-eating, burrowing mammals endemic to Southern Africa. All five species can be found in South Africa and some are also found in Eswatini and Lesotho.

<span class="mw-page-title-main">Marley's golden mole</span> Species of mammal

Marley's golden mole is a species of burrowing mammal in the golden mole family, Chrysochloridae. It is found in South Africa and possibly Eswatini. It has been separated from Amblysomus hottentotus by Bronner. Its natural habitat is indigenous forests and moist grassland, and also gardens. It is classified as Endangered in the IUCN Red List of Threatened Species. The main threats it faces are habitat degradation, either through overgrazing by cattle or the removal of vegetation for firewood, and urbanization.

<span class="mw-page-title-main">Yellow golden mole</span> Species of mammal

The yellow golden mole is a species of mammal in the family Chrysochloridae. It is found in Mozambique, South Africa, and Zimbabwe. The yellow golden mole's natural habitats are subtropical or tropical dry and moist lowland forests, savanna, arable land, pasture, plantations, and rural gardens.

<span class="mw-page-title-main">Sclater's golden mole</span> Species of mammal

Sclater's golden mole is a species of mammal in the family Chrysochloridae. It is found in Lesotho and South Africa. Its natural habitats are subtropical or tropical dry and high-altitude shrubland, Mediterranean-type shrubby vegetation, temperate grassland, arable land, pastureland, rural gardens, and urban areas. This species is locally common, and the International Union for Conservation of Nature has assessed its conservation status as being of "least concern".

<i>Chrysospalax</i> Genus of mammals

Chrysospalax is a small genus of mammal in the family Chrysochloridae. The two members are endemic to South Africa. It contains the following species:

<span class="mw-page-title-main">De Winton's golden mole</span> Species of mammal

De Winton's golden mole is a species of mammal in the family Chrysochloridae. It is endemic to South Africa. Its natural habitats are subtropical dry shrubland, Mediterranean-type shrubby vegetation, and sandy shores. It is threatened by habitat destruction and is "critically endangered". It was named after British zoologist William Edward de Winton.

<span class="mw-page-title-main">Maputaland-Pondoland-Albany Hotspot</span> Southern Africa biodiversity hotspot

The Maputaland-Pondoland-Albany Hotspot (MPA) is a biodiversity hotspot, a biogeographic region with significant levels of biodiversity, in Southern Africa. It is situated near the south-eastern coast of Africa, occupying an area between the Great Escarpment and the Indian Ocean. The area is named after Maputaland, Pondoland and Albany. It stretches from the Albany Centre of Plant Endemism in the Eastern Cape Province of South Africa, through the Pondoland Centre of Plant Endemism and KwaZulu-Natal Province, the eastern side of Eswatini and into southern Mozambique and Mpumalanga. The Maputaland Centre of Plant Endemism is contained in northern KwaZulu-Natal and southern Mozambique.

<span class="mw-page-title-main">Fauna of South Africa</span>

The fauna of South Africa is diverse and largely typical of the ecosystems in Africa. South Africa is ranked sixth out of the world's 17 megadiverse countries. Many endemic species are unique to South Africa. The country is among the world leaders in conservation, but at the time wildlife is threatened by poaching and canned hunting.

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. 79. ISBN   978-0-8018-8221-0. OCLC   62265494.
  2. 1 2 Bronner, G. (2015). "Chrysospalax villosus". IUCN Red List of Threatened Species . 2015: e.T4829A21290416. doi: 10.2305/IUCN.UK.2015-2.RLTS.T4829A21290416.en . Retrieved 12 November 2021.
  3. 1 2 3 4 5 Skinner, John D.; Chimimba, Christian T. (2005). The mammals of the southern african subregion (third revised ed.). Cambridge: Cambridge university press. ISBN   0521844185.