Ussuri shrew
| Ussuri shrew | ||||||||||||
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| Sorex mirabilis | ||||||||||||
| Ognev , 1937 |
The Ussuri shrew ( Sorex mirabilis ) is the largest species of shrew from the genus of the red- toothed shrew ( Sorex ). It occurs in parts of Russia in the Primorye region , the north of the People's Republic of China and the north of Korea .
features
With a head-trunk length of 7.4 to 9.2 centimeters and a weight of 11 to 14 grams, the Ussuri shrew is one of the large species of shrew and is the largest species of the red-toothed shrew. The tail reaches a length of 63 to 73 millimeters - and is therefore only slightly shorter than the rest of the body - the rear foot is 16 to 18 millimeters. The back color is iron gray and does not differ from the gray belly side.
| 1 | · | 5 | · | 1 | · | 3 | = 32 |
| 1 | · | 1 | · | 1 | · | 3 |
The skull has a total length of more than 23 millimeters. As most species of the genus has the type in the maxilla per half an incisor (incisor) and then five unicuspid teeth, a Vorbackenzahn (premolar) and three molars (molar). In the lower jaw, however, it has a single canine behind the incisor. Overall, the animals have a set of 32 teeth. The tooth roots are colored red as in most red-toothed shrews. The second single-pointed tooth of the upper jaw can be smaller or larger than the first, the fourth is larger than the third, but always smaller than the first and second.
The genome of the Ussuri shrew consists of a diploid chromosome set of 2n = 38 (FN = 66).
distribution
The distribution area of the Ussuri shrew is in the extreme northeast of the Asian continent. The species occurs in parts of Russia in the Primorye region , the north of the People's Republic of China and the north of Korea . In China, the deposits are limited to the extreme north in the provinces of Heilongjiang and Jilin .
Way of life
Very little data is available and very rarely documented about the way of life of the Ussuri shrew. The habitat consists mainly of primary deciduous and mixed forests, with the species living in valley areas and on mountain slopes. The activity rates are higher than in other red-toothed shrews. Like all shrews, these species also feed on invertebrates, especially earthworms and insects and their larvae, but sometimes also on the meat of smaller rodents; Overall, a Sorex mirabilis consumes an average of 214.2% of its body weight per day. There is one breeding period per year and thus one litter, in better years there can be two litters as an exception. Young animals are observed from August, they reach sexual maturity in the first warm period after their birth.
Systematics
The Ussuri shrew is classified as an independent species within the genus of the red -toothed shrew ( Sorex ), which consists of around 80 species. The first scientific description comes from the Russian mammalogen Sergei Iwanowitsch Ognjow from 1937, who described an individual from the Russian river Kamenka , a tributary of the Ussuri . Within the genus, the species is classified in the monotypical sub-genus Ognevia named after Ognev . In some cases it was regarded as con-specific to the Pacific shrew ( S. pacificus ), but is now considered an independent species due to numerous characteristics. A closer relationship with the Alpine shrew ( S. alpinus ) is suspected partly due to the genital morphology.
Apart from the nominate form Sorex mirabilis mirabilis, no further subspecies are distinguished within the species .
Threat and protection
The Ussuri shrew is not classified by the International Union for Conservation of Nature and Natural Resources (IUCN) due to a lack of data and is listed as "data deficient".
literature
- Robert S. Hoffmann, Darrin Lunde: Ussuri 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. 317.
Web links
- Sorex mirabilis inthe IUCN 2013 Red List of Threatened Species . Posted by: K. Tsytsulina, 2008. Retrieved January 2, 2014.
Individual evidence
- ↑ a b c d Robert S. Hoffmann, Darrin Lunde: Ussuri 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. 317.
- ↑ a b c d e Sorex mirabilis ( Memento of the original from January 2, 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 .
- ↑ a b c Sorex mirabilis in the IUCN Red List of Threatened Species 2013.2. Posted by: K. Tsytsulina, 2008. Retrieved January 2, 2014.
