African vlei rats Temporal range: Late Pliocene - Recent | |
---|---|
Otomys irroratus grazing on clover. | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Mammalia |
Order: | Rodentia |
Family: | Muridae |
Tribe: | Otomyini |
Genus: | Otomys F. Cuvier, 1824 |
Type species | |
Euryotis irrorata [1] | |
Species | |
26, see text | |
Synonyms | |
|
African vlei rats (Otomys), also known as groove-toothed rats, live in many areas of sub-Saharan Africa. Most species live in marshlands, grasslands, and similar habitats [2] and feed on the vegetation of such areas, occasionally supplementing it with roots and seeds. The name "vlei" refers to the South African term for intermittent, seasonal, or perennial bodies of standing water.
Otomys are compact rodents with a tendency to shorter faces and legs than other types of rats. The tails also are shorter than most Muridae, typically between one third and two thirds of the body length. [3] The coat colour varies according to species, [2] but generally they have the brown-to-grey agouti coats typical of mice and other small wild rodents. Species living in warm or temperate regions tend to have unusually large ears for murids (e.g. Otomys irroratus), whereas some of the alpine species, such as Otomys sloggetti have markedly smaller ears. (However, the latter species may no longer belong in the genus Otomys.)
Depending on the species adult Otomys have a body length between 12 and 22 cm (5–9 inches) and weigh 90 to 260 grams (3–9 oz).
Genus Otomys [1] - groove-toothed or vlei rats
The Old World rats and mice, part of the subfamily Murinae in the family Muridae, comprise at least 519 species. Members of this subfamily are called murines. In terms of species richness, this subfamily is larger than all mammal families except the Cricetidae and Muridae, and is larger than all mammal orders except the bats and the remainder of the rodents.
The blesmols, also known as mole-rats, or African mole-rats, are burrowing rodents of the family Bathyergidae. They represent a distinct evolution of a subterranean life among rodents much like the pocket gophers of North America, the tuco-tucos in South America, and the Spalacidae from Eurasia.
The Southern African vlei rat is a species of rodent in the vlei rat genus, Otomys, of the family Muridae in the order Rodentia. This is the type species of the genus. It is native to the grasslands and swamps of southern Africa where it is a common species.
The Mount Elgon vlei rat is a species of rodent in the family Muridae. It is endemic to Mount Elgon, an extinct volcano on the border between west-central Kenya and south-eastern Uganda. As of 2021, it is considered near threatened by the International Union for the Conservation of Nature and is under threat from fires and unsustainable resource extraction by humans.
The laminate vlei rat is a species of rodent in the family Muridae. It is found only in South Africa. Its natural habitats are subtropical or tropical high-altitude grassland and swamps.
The afroalpine vlei rat is a species of rodent in the family Muridae. It is found in the high moorlands of Kenya.
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".
The Ethiopian vlei rat is a species of vlei rat in the rodent family Muridae. It is found only in Ethiopia and is considered endemic.
The bush vlei rat or Karoo bush rat is a species of rodent in the family Muridae. It is found in Namibia and South Africa. Its natural habitat is temperate shrubland. The Karoo rat uses behavioral adaptations to cope with the dry arid climate. It is a medium-sized rodent with a dark pelage on top and lighter underneath. It has light colored feet and a dark tail. The rat may have light colored fur around its eyes and the back of its ears.
The Uzungwe vlei rat is a species of rodent in the family Muridae. It is found in Malawi, Tanzania, and Zambia. Its natural habitats are subtropical or tropical high-altitude grassland and swamps. It is threatened by habitat loss.
The Cheesman's vlei rat is a species of rodent in the family Muridae. It is considered endemic to northwestern Ethiopia.
The Simien vlei rat is a species of rodent in the family Muridae. It is found in northern Ethiopia.
The Yalden's vlei rat is a species of rodent in the family Muridae. It is found in the Bale Mountains, in southwestern Ethiopia.
Thomas's vlei rat is a species of rodent in the family Muridae. It is endemic to Kenya's high plateau mountains of the Rift Valley.
Mount Kilimanjaro vlei rat is a species of rodent in the family Muridae. It is found in north-eastern Tanzania, on Mount Kilimanjaro.
Charada vlei rat is a species of rodent in the family of Muridae. It is endemic to southwestern Ethiopia.
Heller's vlei rat is a species of rodent in the family of Muridae. It is endemic to Ethiopia and is found on the Arussi Plateau and the Bale Mountains.