Balikun jerboa
| Balikun jerboa | ||||||||||||
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| Allactaga balikunica | ||||||||||||
| Hsia & Fang , 1964 |
The Balikun jerboa ( Allactaga balikunica ) is a rodent from the genus of the horse jumper ( Allactaga ). It occurs in the border region between the People's Republic of China and Mongolia .
features
The Balikun jerboa reaches a head-trunk length of 11.5 to 13.2 centimeters with a tail of 16.5 to 19.0 centimeters in length and a weight of 65 to 80 grams. The rear foot length is 57 to 61 millimeters, the ear length 31 to 36 millimeters. The back fur is yellowish-brown-gray and has black stripes. The base of the hair is gray, the center yellow, and the tip dark brown. The trunk is a little darker and the sides of the body are colored gray-whitish. The belly, the forelegs and the insides of the hind legs are white, the back of the hind legs is sand-yellow-gray. The tail has a little pronounced tassel of hair, the base of the tail is not white underneath.
| 1 | · | 0 | · | 1 | · | 3 | = 18 |
| 1 | · | 0 | · | 0 | · | 3 |
The skull has a total length of 30 to 33 millimeters. It is curved and rounded at the base. Like all species of the genus have the animals in the upper jaw half per one to a incisor tooth formed incisor (incisor) to which a tooth gap ( diastema follows). This is followed by a premolar and three molars . In contrast, the animals do not have a premolar in the lower jaw. In total, the animals have a set of 18 teeth. The incisors protrude beyond the very short nasal bones . The timpani are somewhat flattened and are clearly spaced from each other on the underside.
distribution
The Balikun jerboa occurs in the border region between the People's Republic of China and Mongolia . In the People's Republic of China, she is known from the Balikun region in the Xinjiang autonomous region . In Mongolia she lives in the Gobi desert in the Altai , Alashan and parts of the eastern Gobi.
Way of life
The Balikun jerboa is nocturnal and lives in arid desert and semi-desert areas in stony and sandy areas with little vegetation. It feeds on green parts of plants such as leaves and sprouts as well as roots, grass seeds and insects. She is a loner and lives alone in a building. Little information is available about reproduction. Balikun jerboa are likely to have offspring once or twice a year, and reproduction in May has been documented. The litter consists of one to three young animals.
The species occurs in the southeast of Mongolia parapatric with the Gobi jerboa ( A. bullata ).
Systematics
The Balikun jerboa is classified as an independent species within the genus of the horse jumper ( Allactaga ), which consists of eleven species. The first scientific description comes from Hsia and Fang from 1964, who described the species using individuals from Xinjiang in China. At times the species was classified as a subspecies of the Gobi jerboa ( A. bullata ), with which it is closely related.
Status, threat and protection
The Balikun jerboa is classified as Least Concern by the International Union for Conservation of Nature and Natural Resources (IUCN). This is justified with the large distribution area and the assumed large populations of the species, partly also in protected areas. There are no known factors that could endanger the survival of this species.
supporting documents
- ↑ a b c d e f g Andrew T. Smith: Balikun Jerboa. 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 , p. 199.
- ↑ Andrew T. Smith: Family Dipodidae / Subfamily Allactaginae. 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. 198-199.
- ↑ a b c d Allactaga balikunica in the IUCN Red List of Threatened Species 2014.3. Posted by: D. Avirmed, S. Shar, D. Lkhagvasuren, AT Smith, 2008. Retrieved July 4, 2015.
- ↑ a b Allactaga balikunica ( Memento of the original from July 5, 2015 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. . 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 .
literature
- Andrew T. Smith: Balikun Jerboa. 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 , p. 199.
Web links
- Allactaga balikunica inthe IUCN Red List of Threatened Species 2014.3. Posted by: D. Avirmed, S. Shar, D. Lkhagvasuren, AT Smith, 2008. Retrieved July 4, 2015.