Southeast Asian shrew
| Southeast Asian shrew | ||||||||||||
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| Crocidura fuliginosa | ||||||||||||
| ( Blyth , 1856) |
The Southeast Asian shrew ( Crocidura fuliginosa ) is a species of shrew from the genus of the white-toothed shrew ( Crocidura ). It occurs in large parts of Southeast Asia.
features
With a head-to-trunk length of 7.9 to 10.5 centimeters and a weight of around 13 grams, the Southeast Asian shrew is one of the larger species of shrew. The tail reaches a length of 62 to 89 millimeters and mostly about 80% to a maximum of 90% of the head-trunk length. The rear foot is 15 to 19 millimeters in length and the ear is around 10 millimeters. The back fur is smoky brown to dark gray-black, on the belly side the color changes gradually to a dark gray. The tail is dark brown on the top and a little lighter on the underside, but not clearly contrasted.
| 1 | · | 3 | · | 1 | · | 3 | = 28 |
| 1 | · | 1 | · | 1 | · | 3 |
The skull has a total length of 22 to 25 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.
The genome of the Southeast Asian shrew was studied from animals from Indochina and the Malay Peninsula. It was found that the diploid chromosome set consists of 2n = 40 (FN = 54–58).
distribution
The Southeast Asian shrew occurs in large parts of Southeast Asia. The distribution area extends from the central and southern regions in the east of the People's Republic of China over the entire Southeast Asian mainland. It occurs in Cambodia , Laos , Malaysia , Myanmar , Thailand and Vietnam . The species has also been found sporadically in India, but no specific information is available. The populations of the island of Taiwan, however, are considered a separate species. The altitude distribution is probably below 3000 meters.
Way of life
As with many species of shrew, the way of life of the Southeast Asian shrew is largely unexplored. It is assumed that it occurs mainly in the lowlands in the area of river valleys and mountain foothills with dry and hot weather. Like all shrews, this species feeds on invertebrates, mostly insects and worms. Nothing is known about reproduction.
Systematics
The Southeast Asian shrew is classified as an independent species within the genus of the white-toothed shrew ( Crocidura ), which consists of around 170 species. The first scientific description comes from Edward Blyth in 1856, who described an individual from Schwegyin near the city of Bago in what is now Myanmar . Various forms, which are now considered to be separate species, were classified into this species at times, especially Crocidura malayana , which occurs on the Malay Peninsula and some offshore islands. Finds from the Chinese province of Zhejiang from 1993 that are assigned to this species are probably a separate, previously undescribed species.
Today, in addition to the nominate form Crocidura fuliginosa fuliginosa, another subspecies called Crocidura fuliginosa dracula is distinguished within the species . However, this is occasionally outsourced as a separate species, Crocidura dracula .
Threat and protection
The Southeast Asian shrew is classified by the International Union for Conservation of Nature and Natural Resources (IUCN) as least concern due to its very large distribution area, the assumed large populations and the relatively high adaptability to modified habitats . In addition, the species occurs in numerous protected areas within its range. Potential threats to the species population as a whole are unknown.
literature
- Robert S. Hoffmann, Darrin Lunde: Southeast Asian 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. 299.
Web links
- Crocidura fuliginosa inthe IUCN 2013 Red List of Threatened Species . Posted by: S. Molur, 2008. Retrieved January 14, 2014.
supporting documents
- ↑ a b c d e Robert S. Hoffmann, Darrin Lunde: Southeast Asian 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. 299.
- ↑ a b c d e Crocidura fuliginosa . 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 d Crocidura fuliginosa in the IUCN Red List of Threatened Species 2013.2. Posted by: S. Molur, 2008. Retrieved January 16, 2014.
- ↑ Crocidura malayana . 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 .