Gobi jerboa
| Gobi jerboa | ||||||||||||
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| Allactaga bullata | ||||||||||||
| Allen , 1925 |
The Gobi jerboa ( Allactaga bullata ) 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 in the Gobi desert .
features
The Gobi jerboa reaches a head-trunk length of 11.5 to 14.5 centimeters with a tail of 16.5 to 20.0 centimeters in length and a weight of 80 to 93 grams. The rear foot length is 56 to 62 millimeters, the ear length 31 to 38 millimeters. The fur on the back and the outside of the hips are gray-sand-colored, with the latter having a distinct dark stripe over the hips in the upper half. The belly, the front legs, the inside of the rear legs and the lower lip are white. The tail has well-developed tufts of hair. The tufts of hair on the underside are white at the base, the last 20 millimeters of the tail are completely white.
Compared to the Balikun jerboa ( Allactaga balikunica ), the color is a little lighter and slightly more reddish, and they also differ in terms of tail hair and color. The Mongolian horse diver ( Allactaga sibirica ) is also similar in color to both species.
| 1 | · | 0 | · | 1 | · | 3 | = 18 |
| 1 | · | 0 | · | 0 | · | 3 |
The skull has a total length of 30 to 35 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 upper incisors are lightly applied. The tympanic bubbles are large and almost meet at the bottom.
distribution
The Gobi jerboa occurs in the border region between the People's Republic of China and Mongolia . In the People's Republic of China it is known from the provinces of Xinjiang , Nei Mongol and Gansu . In Mongolia she lives in the Gobi desert in the Altai , Alashan and parts of the eastern Gobi.
Way of life
The Gobi jerboa is nocturnal and lives in dry and sandy, open desert and semi-desert areas with sparse vegetation consisting of salty grasses and desert bushes. It feeds on green parts of plants such as leaves and sprouts as well as roots, grass seeds and insects, especially beetles and grasshoppers. She is a loner and lives alone in a simple building that can reach a length of 60 centimeters and contains an unpadded nest chamber. Gobi jerboa have offspring once or twice a year between May and August, and the litter consists of one to three young.
The species occurs in the south-east of Mongolia parapatric with the Balikun jerboa ( Allactaga balikunica ).
Systematics
The Gobi 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 Glover Morrill Allen from 1925, who described the species using individuals from the area around the Tsagaan Nuur in Mongolia. At times the Balikun jerboa ( Allactaga balikunica ) was classified as a subspecies of the Gobi jerboa, to which it is closely related.
Status, threat and protection
The Gobi jerboa is classified by the International Union for Conservation of Nature and Natural Resources (IUCN) as Least Concern. 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 h Andrew T. Smith: Gobi 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. 200
- ↑ 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 bullata in the IUCN Red List of Threatened Species 2014.3. Posted by: N. Batsaikhan, D. Avirmed, S. Shar, AT Smith, 2008. Retrieved July 4, 2015.
- ↑ a b Allactaga bullica ( 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: Gobi 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. 200.
Web links
- Allactaga bullata inthe IUCN Red List of Threatened Species 2014.3. Posted by: N. Batsaikhan, D. Avirmed, S. Shar, AT Smith, 2008. Retrieved July 4, 2015.