You are looking at 1-18 of 18 entries  for:

  • All: African Mole Rats x
  • Life Sciences x
clear all

View:

African Mole Rats

African Mole Rats   Reference library

The Encyclopedia of Mammals (3 ed.)

Reference type:
Subject Reference
Current Version:
2007
Subject:
Science and technology, Life Sciences
Length:
2,873 words
Illustration(s):
4

...M. Jarvis Factfile - African Mole Rats Order: Rodentia Family: Bathyergidae At least 12 species in 5 genera: Dune mole rats (genus Bathyergus , 2 species), the largest mole rats, inhabiting sandy coastal soils of S Africa; Common mole rats ( Cryptomys , at least 7 species), widespread in W, C, and S Africa; Silvery mole rat ( Heliophobius argenteocureau), C and E Africa; Cape mole rat ( Georychus capensis ), Cape Province of the Republic of S Africa, along the coast from the SW to the E; and Naked mole rat ( Heterocephalus glaber...

Bathyergidae

Bathyergidae   Quick reference

A Dictionary of Zoology (4 ed.)

Reference type:
Subject Reference
Current Version:
2014
Subject:
Science and technology, Life Sciences
Length:
119 words

... ( mole rats ; order Rodentia , suborder Hystricomorpha ) A family of mole-like rodents that live in shallow tunnels. Most of the hair is lost, the legs are short, strong, and pentadactyl , with strong claws. The skull is short and strong, with occipital and sagittal crests prominent, and paroccipital processes short. The cheek teeth are hypsodont , and rooted. The teeth are reduced in number. The animals are distributed throughout Africa south of the Sahara. There are about 22 species, in five genera. At least one species, ...

Other Old World Rats and Mice

Other Old World Rats and Mice   Reference library

The Encyclopedia of Mammals (3 ed.)

Reference type:
Subject Reference
Current Version:
2007
Subject:
Science and technology, Life Sciences
Length:
2,366 words
Illustration(s):
4

...Old World Rats & Mice 65 species in 30 genera and 8 subfamilies Distribution Balkans, S Russia, Africa, Madagascar, S India, China See Other Old World Rat and Mouse Subfamilies Other Old World Rat and Mouse Subfamilies Blind mole rats Subfamily Spalacinae 8 species in 2 genera: Greater blind mole rats (Spalax, 5 species); Lesser blind mole rats ( Nannospalax , 3 species). Balkans, S Russia, E Mediterranean, N Africa. 5 species are Vulnerable. African pouched rats Subfamily Cricetomyinae 5 species in 3 genera: Giant pouched rats ( Cricetomys...

Golden Moles

Golden Moles   Reference library

The Encyclopedia of Mammals (3 ed.)

Reference type:
Subject Reference
Current Version:
2007
Subject:
Science and technology, Life Sciences
Length:
1,270 words
Illustration(s):
2

...mole ( C. stuhlmanni ), mountains in C and E Africa; Cape golden mole ( C. asiatica ), W Cape to Little Namaqualand; and Visagie's golden mole ( C. visagiei ), succulent karoo of W Cape, Critically Endangered. Distribution Sub-Saharan Africa, including Somalia. African golden moles Genus Chlorotalpa 2 species: Sclater's golden mole ( C. sclateri ), high-altitude grasslands and scrub in W Cape, Lesotho, E Free State, and Mpumalanga, Vulnerable; and Duthie's golden mole ( C. duthieae ), coastal forests in W and E Cape, Vulnerable...

New World Rats and Mice

New World Rats and Mice   Reference library

The Encyclopedia of Mammals (3 ed.)

Reference type:
Subject Reference
Current Version:
2007
Subject:
Science and technology, Life Sciences
Length:
7,579 words
Illustration(s):
5

...status 8 species are currently listed as Critically Endangered, and a further 24 as Endangered, including 6 species of wood rats (genus Neotoma ) and 4 of the 5 species of fish-eating rats ( Neusticomys ). See New World Rat and Mouse Tribes Colonizing the Continents Rats and mice originated in North America from the same kind of primitive rodents as the hamsters of Europe and Asia and the pouched rats of Africa, their nearest Old World relatives today. These ancestors, the so-called cricetine rodents, first appeared in the Old World in...

Cavy-like Rodents

Cavy-like Rodents   Reference library

The Encyclopedia of Mammals (3 ed.)

Reference type:
Subject Reference
Current Version:
2007
Subject:
Science and technology, Life Sciences
Length:
1,017 words
Illustration(s):
11

...the naked mole rats of East Africa – virtually hairless creatures that spend almost all their time underground in extensive colonies. This is a breeding female. Gordon B. Corbet Factfile - Cavy-like Rodents Distribution America, Africa, Asia. Hystricognaths Suborder Hystricognathi 235 species in 63 genera and 18 families New world porcupines Family Erethizontidae 12 species in 4 genera Cavies Family Caviidae 14 species in 5 genera Capybara Family Hydrochaeridae 1 species: Hydrochaeris hydrochaeris Cane rats Family...

Rodents

Rodents   Reference library

The Encyclopedia of Mammals (3 ed.)

Reference type:
Subject Reference
Current Version:
2007
Subject:
Science and technology, Life Sciences
Length:
8,136 words
Illustration(s):
8

...kangaroo rats hidden in burrows. Rats in burrows respond with carefully-timed drumming which does not overlap with those of the above-ground drummer. Drumming provides useful information about spacing and serves to reinforce territorial ownership. Female rats drumming at males tend to be saying “go away.” Mother banner-tails drum vigorously at snakes. Banner-tails moving into a new neighborhood were found to alter their drums to be different from their neighbors. While the social systems of some rodents have been well studied ( see African Mole Rats ), the habits...

Ethiopian Wolf

Ethiopian Wolf   Reference library

The Encyclopedia of Mammals (3 ed.)

Reference type:
Subject Reference
Current Version:
2007
Subject:
Science and technology, Life Sciences
Length:
1,220 words
Illustration(s):
2

... 53–62cm (21–24in); weight 11–20kg (24–44lb); males on average are about 20 percent larger than females. Coat Tawny red with pale ginger underfur; chin, inside ears, chest, and underparts white, with distinctive white band around the underside of the neck. Diet Mole rats and grass rats. Breeding Gestation 60–62 days; litter size 2–7. Longevity Up to 11 years. Conservation status...

Tenrecs

Tenrecs   Reference library

The Encyclopedia of Mammals (3 ed.)

Reference type:
Subject Reference
Current Version:
2007
Subject:
Science and technology, Life Sciences
Length:
2,733 words
Illustration(s):
4

...apparently closely related to one of the oldest fossil species. The rice tenrecs, with their molelike velvet fur, reduced ears and eyes, and relatively large forefeet, fill a similar niche to the mole in Madagascar. In undisturbed areas of northern and western Madagascar, these tenrecs burrow through the humus layers in a manner similar to the North American shrew mole, but the extensive cultivation of rice provides new habitats for them. The subfamily Tenrecinae contains some of the most fascinating and bizarre species. The tail has been lost or greatly reduced...

Crickets and Grasshoppers

Crickets and Grasshoppers   Reference library

The New Encyclopedia of Insects and their Allies (3 rev. ed.)

Reference type:
Subject Reference
Current Version:
2009
Subject:
Science and technology, Life Sciences
Length:
4,804 words
Illustration(s):
4

...the Australian and South African king crickets, which are amongst the bulkiest of all the orthopterans. The tusks of the tusked weta, such as Hemiandrus monstrosus and Motuweta isolata , are long, forward projections from the base of the mandibles, the size of which is variable. In some species the tusks have stridulatory pegs that permit the insects to produce audible sounds by making a pincer movement. Approximately 16 of the New Zealand weta species are in serious decline, partly due to predation by introduced animals such as rats. Current research on...

Hedgehogs and Moonrats

Hedgehogs and Moonrats   Reference library

The Encyclopedia of Mammals (3 ed.)

Reference type:
Subject Reference
Current Version:
2007
Subject:
Science and technology, Life Sciences
Length:
4,468 words
Illustration(s):
5

...this does not happen frequently. Venom resistance is not restricted to hedgehogs – other animals as unrelated as opossums and mongooses also exhibit this quality. Among European eulipotyphlans, extracts from shrew and mole muscles also have an antihemorrhagic effect, although this is less marked; those of such other mammals as mice, rats, and rabbits do...

What Is a Mammal?

What Is a Mammal?   Reference library

The Encyclopedia of Mammals (3 ed.)

Reference type:
Subject Reference
Current Version:
2007
Subject:
Science and technology, Life Sciences
Length:
16,212 words
Illustration(s):
8

...sengis (elephant shrews), tenrecs, and golden moles. The earliest phases of this group's evolutionary history unfortunately are not known, because the late Cretaceous fossil record in Africa has not been well explored. However the earliest fossil records of the terrestrial members of these groups are all African; very primitive relatives of elephants, hyraxes, and sengis first appear in northwest Africa during the earliest part of the Eocene, between 55 and 50 million years ago. Given its presumed endemic African roots, this clade (or group that shares a...

Snakes

Snakes   Reference library

The New Encyclopedia of Reptiles and Amphibians (2 ed.)

Reference type:
Subject Reference
Current Version:
2008
Subject:
Science and technology, Life Sciences
Length:
18,296 words
Illustration(s):
30

..., and the African grass snake, Psammophylax variabilis , both have egg-laying and live-bearing populations; in every case, the live-bearers live in cooler parts of the species' range. Clutch or litter sizes are largely independent of whether a species is oviparous or viviparous, but are closely correlated with the species' size. Within a species, larger females produce larger clutches. The most prolific species include the two largest pythons, the Reticulated and the Burmese, which can both produce clutches approaching 100 eggs, and the African mole snake and...

Naked Mole-Rats

Naked Mole-Rats   Reference library

Encyclopedia of Evolution

Reference type:
Subject Reference
Current Version:
2005
Subject:
Science and technology, Life Sciences, Social sciences, Anthropology
Length:
2,057 words
Illustration(s):
1

...Mole-Rats Mole-rat is the vernacular name for thirty-seven species of fossorial rodents in ten genera that inhabit subterranean burrows like moles but whose cylindrical body shape, slender tail, and large incisors resemble those of rats. This entry focuses on Heterocephalus glaber (literally ‘otherheaded smooth’), the most unusual-looking and social of the African mole-rats (family Bathyergidae). Figure 1. A naked mole-rat cannot be mistaken for any other mammal.Photo courtesy of Paul W. Sherman. Naked mole-rats resemble overcooked sausages with buck...

Eusociality

Eusociality   Reference library

Encyclopedia of Evolution

Reference type:
Subject Reference
Current Version:
2005
Subject:
Science and technology, Life Sciences, Social sciences, Anthropology
Length:
6,065 words
Illustration(s):
1

...twenty adults, except for colonies of certain African mole rats, especially the naked mole-rat, whose colonies contain up to 300 individuals. [ See Naked Mole-Rats .] The young stay at home when ecological conditions make dispersal especially difficult or group-living particularly beneficial. As a result, colonies typically are composed of two or more generations of reproductively mature, closely related individuals. However, the length of time offspring remain at home varies. In black-tailed prairie dogs, African lions, and golden jackals, some offspring...

Mammals

Mammals   Reference library

Encyclopedia of Evolution

Reference type:
Subject Reference
Current Version:
2005
Subject:
Science and technology, Life Sciences, Social sciences, Anthropology
Length:
5,871 words
Illustration(s):
1

...the flying squirrels and the scaly-tailed flying squirrels of Africa. Separate stocks adapted for underground life (tuco tucos, pocket gophers, mole rats) ( Nevo , 1999 ); bipedal desert-adapted rodents evolved several times (jerboas, kangaroo rats, jumping mice) ( Prakash and Ghosh , 1975 ); semiaquatic adaptations are exemplified by the Australian water rats, muskrats, beaver, and water voles. Arboreal adaptations include the squirrels and numerous other groups such as dormice and climbing rats. Convergence in form and function have led to numerous studies...

Alloparental Care

Alloparental Care   Reference library

Encyclopedia of Evolution

Reference type:
Subject Reference
Current Version:
2005

...established as breeders (parental facilitation). Such tolerance has been reported to facilitate survival of the offspring in jays and may be associated with territorial bequeathal in squirrels. See also Eusociality , article on Eusociality in Mammals ; Group Living ; Naked Mole-Rats ; Parental Care ; Reciprocal Altruism . Brown, J. L. Helping and Communal Breeding in Birds: Ecology and Evolution . Princeton, 1987. Choe, J. C. , and E. J. Crespi eds. The Evolution of Social Behaviour in Insects and Arachnids . Cambridge, 1997. Dugatkin, L. A. ...

View: