Crocidura sibirica
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| Dukelsky, 1930 |
Crocidura sibirica is a species of shrew from the genus of the white-toothed shrew ( Crocidura ). It occurs in Central to Northeast Asia from Kyrgyzstan and Kazakhstan to Siberia , Russia and Mongolia as well as in the northwest of the People's Republic of China .
features
With a head-torso length of about 5.8 to 8.0 centimeters and a weight of 50 to 96 grams, Crocidura sibirica is one of the medium-sized shrews in Eurasia . The tail reaches a length of 30 to 39 millimeters and is comparatively short with about 50% of the head-trunk length. The rear foot has a length of 10 to 13 millimeters. The back fur is brown-gray and somewhat lighter than in comparable species, the belly is white-gray and sharply separated from the back. The tail is a single color, dark brown
| 1 | · | 3 | · | 1 | · | 3 | = 28 |
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The skull has a total length of 18 to 20 millimeters. Like all species of the genus, the species has one incisor per half in the upper jaw and then three single-pointed teeth, a premolar and three molars . In the lower jaw, however, it has a single canine behind the incisor. In total, the animals have a set of 28 teeth. As with all white-toothed shrews, the tooth roots are not pigmented in contrast to those of the red- toothed shrews.
distribution
Crocidura sibirica occurs in Central to Northeast Asia from Kyrgyzstan and Kazakhstan to Siberia , Russia and Mongolia as well as in the northwest of the People's Republic of China .
Way of life
Crocidura sibirica occurs in numerous habitats, with habitats ranging from mountain coniferous forests and pastures on rivers and streams with floodplain thickets of willow, birch and aspen over dense taiga to swampy waterholes and flood plains. The species is known to colonize abandoned mole tunnels. Like all shrews, this species feeds on invertebrates, especially insects; Food analyzes revealed a large number of beetles and grasshoppers. Little is known about reproduction.
Systematics
Crocidura sibirica is classified as an independent species within the genus of white-toothed shrews ( Crocidura ), which consists of around 170 species. The first scientific description comes from Dukelsky from 1930, who described an individual from the upper reaches of the Yenisei in Siberia, about 96 kilometers south of the Russian city of Minusinsk . Sometimes Crocidura sibirica was assigned to the species Crocidura leucodon as a subspecies. It is likely to be closely related to C. suaveolens and C. shantungensis .
Today, apart from the nominate form Crocidura sibirica sibirica, no further subspecies are distinguished within the species .
Threat and protection
Crocidura sibirica is classified as not endangered (least concern) by the International Union for Conservation of Nature and Natural Resources (IUCN) due to its large distribution area, large populations and the absence of any threat to the population. It is viewed regionally as a pest and controlled accordingly.
literature
- Robert S. Hoffmann, Darrin Lunde: Siberian Shrew. 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. 301.
Web links
- Crocidura sibirica inthe IUCN 2013 Red List of Threatened Species . Posted by: M. Stubbe, R. Samiya, J. Ariunbold, V. Buuveibaatar, S. Dorjderem, Ts., Monkhzul, M. Otgonbaatar, M. Tsogbadrakh, 2008. Retrieved January 18, 2014.
supporting documents
- ↑ a b c d e f Robert S. Hoffmann, Darrin Lunde: Siberian Shrew. 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. 301.
- ↑ a b Crocidura sibirica in the Red List of Threatened Species of the IUCN 2013.2. Posted by: M. Stubbe, R. Samiya, J. Ariunbold, V. Buuveibaatar, S. Dorjderem, Ts., Monkhzul, M. Otgonbaatar, M. Tsogbadrakh, 2008. Retrieved January 18, 2014.
- ↑ a b c d Crocidura sibirica ( Memento of the original dated February 3, 2014 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 .
