Crocidura vorax
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Crocidura vorax |
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| G. Allen , 1923 |
Crocidura vorax is a species of shrew from the genus of white-toothed shrews ( Crocidura ). It occurs in central to southern China as well as in the adjacent northeastern India , in Thailand , Laos and the north of Vietnam .
features
With a head-trunk length of 5.4 to 9 centimeters, Crocidura vorax is one of the medium-sized shrews in Eurasia . The tail reaches a length of 41 to 51 millimeters. The rear foot is 11 to 14 millimeters long. In its appearance, the species corresponds to Crocidura rapax , but it is somewhat larger and the fur on the back is clearly lighter brown with a gray band on the back, and the belly side is also lighter gray. The tail is slightly two-tone brown.
| 1 | · | 3 | · | 1 | · | 3 | = 28 |
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The skull has a base length of about 18.8 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 vorax occurs in central to southern China as well as in the adjacent northeastern India , in Thailand , Laos and the north of Vietnam . It is likely also found in Myanmar , but has not yet been documented in the country.
Way of life
As with many shrew species, the way of life of Crocidura vorax is largely unexplored; almost no data is available here. In China it is probably a highland species, the type was discovered in a mountain forest on the Ssu Shan at an altitude of 4000 meters and in Laos one individual was caught in the evergreen rainforest near Ban Taong and another in the lowlands at heights of 200 to 300 meters . The species can probably live in different habitats accordingly, but its adaptability to habitat changes is not known. Like all shrews, this species feeds on invertebrates, mostly insects and worms.
Systematics
Crocidura vorax 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 G. Allen from 1923, who described an individual from the area around Lijiang in the province of Yunnan in the south of the People's Republic of China. Crocidura vorax was formerly classified together with other species such as Crocidura rapax in the species Crocidura gueldenstaedtii , Crocidura russula or Crocidura pullata .
Today, apart from the nominate form Crocidura vorax vorax, no further subspecies are distinguished within the species .
Threat and protection
Crocidura vorax 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 unknown threat to the population. If the type depends on undisturbed forest stands, it can be affected locally by timber harvesting, clearing and conversion of forest areas into agriculturally used areas and settlement areas.
literature
- Robert S. Hoffmann, Darrin Lunde: Voracious 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. 302.
Web links
- Crocidura vorax inthe IUCN 2013 Red List of Threatened Species . Posted by: F. Chiozza, 2008. Retrieved January 19, 2014.
supporting documents
- ↑ a b c d Robert S. Hoffmann, Darrin Lunde: Voracious 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. 302.
- ↑ a b c d Crocidura vorax in the Red List of Threatened Species of the IUCN 2013.2. Posted by: F. Chiozza, 2008. Retrieved January 19, 2014.
- ↑ a b c d Crocidura vorax ( Memento of the original from February 3, 2014 in the Internet Archive ) Info: The archive link was automatically inserted and not yet 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 .
