Gansu bank vole

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Gansu bank vole
Systematics
Superfamily : Mice-like (Muroidea)
Family : Burrowers (Cricetidae)
Subfamily : Voles (arvicolinae)
Tribe : Myodini
Genre : Caryomys
Type : Gansu bank vole
Scientific name
Caryomys eva
( Thomas , 1911)

The Gansu bank vole or Eva's red-backed vole ( Caryomys eva , syn .: Eothenomys eva ) is a species of rodent belonging to the genus Caryomys . It occurs in the central mountain regions in China .

features

The Gansu bank vole reaches a head-trunk length of 8.3 to 10.0 centimeters with a tail of 4.6 to 6.0 centimeters in length . The rear foot length is 15 to 18 millimeters, the ear length 10.5 to 13 millimeters. The back fur is reddish gray, the peritoneum dark gray with sandy brown hair tips. The tail is shorter than half the length of the head and torso, it is dark brown on the top and pale brown on the underside with no sharp delimitation. The tops of the hands and feet are dark brown.

The skull has a length of 21.0 to 24.5 millimeters. It corresponds to that of the Kolan bank vole ( Caryomys inez ) and differs from it mainly in specific tooth features.

distribution

The Gansu bank vole is found in the central Chinese mountain regions in northern Sichuan , southern Gansu and the adjacent areas of Shaanxi and Hubei . She lives at altitudes of 2600 to 4000 meters.

Way of life

The Gansu bank vole lives mainly in mountain forests and sometimes in moist, moss-rich forest areas at altitudes between 2600 and 4000 meters. It feeds mainly on seeds, buds, young leaves, bark and grasses.

Systematics

The Gansu bank vole is classified as a separate species within the genus Caryomys , which consists of two species. The first scientific description of the two species and the genus comes from the British zoologist Oldfield Thomas , who described the species in 1911 using individuals from the Tauchow region in Gansu. Originally, both species were assigned to the field mice ( Microtus ), later they were partially assigned to the Père David voles ( Eothenomys ). Due to the shape of the penis bone (baculum), the genus with the two species was established in 1992.

Within the species, Ce alcinous from the Daxue and Qiongla i mountains in Sichuan with a significantly darker ventral side and the nominate form C.e. eva described two subspecies in the rest of the distribution area and confirmed them by measurements of the skull.

The designation as eva was not further explained by Thomas in the first description, accordingly it is not known whether it is an eponym and thus an appreciation or dedication or whether he chose the name for other reasons.

Status, threat and protection

Although little information is available about the Gansu bank vole population, it is classified as Least Concern by the International Union for Conservation of Nature and Natural Resources (IUCN). This is justified with the relatively large distribution area and the assumed large populations of the species. In the distribution area of ​​the species, there are no known risks that could endanger the population, as no information is available.

supporting documents

  1. ↑ a b c d e f Darrin Lunde, Andrew T. Smith: Eva's Vole. In: Andrew T. Smith , Yan Xie: A Guide to the Mammals of China. Princeton University Press, Princeton NJ 2008, ISBN 978-0-691-09984-2 , pp. 219-220.
  2. ↑ a b c d e Caryomys eva in the IUCN Red List of Threatened Species 2016.2. Listed by: AT Smith, CH Johnston, 2008. Retrieved September 27, 2016.
  3. ↑ a b c Caryomys eva . In: Don E. Wilson , DeeAnn M. Reeder (Eds.): Mammal Species of the World. A taxonomic and geographic Reference. 2 volumes. 3. Edition. Johns Hopkins University Press, Baltimore MD 2005, ISBN 0-8018-8221-4 .
  4. ↑ Bo Beolens, Michael Grayson, Michael Watkins: The Eponym Dictionary of Mammals. Johns Hopkins University Press, 2009; P. 130; ISBN 978-0-8018-9304-9 .

literature

  • Darrin Lunde, Andrew T. Smith: Eva's Vole. In: Andrew T. Smith , Yan Xie: A Guide to the Mammals of China. Princeton University Press, Princeton NJ 2008, ISBN 978-0-691-09984-2 , pp. 219-220.

Web links