Crocidura indochinensis
| Crocidura indochinensis | ||||||||||||
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| Crocidura indochinensis | ||||||||||||
| Robinson & Kloss , 1922 |
Crocidura indochinensis is a species of shrew from the genus of the white-toothed shrew ( Crocidura ). It occurs in Southeast Asia in parts of the People's Republic of China to central Thailand and in the south of Vietnam.
features
With a head-body length of about 6.6 centimeters counts Crocidura indochinensis to the smaller shrews Asia, which is slightly larger than the only on the island of Hainan occurring Crocidura wuchihensis . The tail reaches a length of 47 to 50 millimeters. The rear foot is 12 to 13 millimeters long. The back fur is dark brown-gray with a slightly grayer belly. It can only be distinguished from Crocidura wuchihensis by the proportions of the skull.
| 1 | · | 3 | · | 1 | · | 3 | = 28 |
| 1 | · | 1 | · | 1 | · | 3 |
The skull has a total length of 17 to 18 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 indochinensis occurs in Southeast Asia in parts of the People's Republic of China except for the Malay Peninsula. The knowledge about the species comes mainly from individual records in the south of the People's Republic of China from the provinces of Yunnan , Sichuan and Fujian , the north and east of Myanmar , from north and central Thailand , north and central Laos and from the north and South of Vietnam . The altitude distribution ranges from 1200 to 2400 meters.
Way of life
As with many shrew species, the way of life of Crocidura indochinensis is largely unexplored. It occurs in mountain forests, although it has been found in primary and secondary forests as well as in deciduous and coniferous forests. Like all shrews, this species feeds on invertebrates, especially insects. Nothing is known about reproduction.
Systematics
Crocidura indochinensis 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 Robinson and Kloss from 1922, who described an individual from the vicinity of the city of Đà Lạt on the Langbian Plateau in Vietnam . This species was temporarily assigned to the C. horsfieldii living in Sri Lanka and India together with Crocidura wuchihensis , but today both are considered to be separate species. It is also discussed whether the taxon Crocidura indochinensis possibly contains several species.
Today, apart from the nominate form Crocidura indochinensis indochinensis, no further subspecies are distinguished within the species .
Threat and protection
Crocidura indochinensis is not endangered by the International Union for Conservation of Nature and Natural Resources (IUCN) despite very little knowledge of the ecological requirements due to the large distribution area, the assumed large populations and the non-existent threat to the population as well as the assumed adaptability to changed habitats (least concern). Should it come to a separation into several species in the future, some of them could be assessed as threatened.
literature
- Robert S. Hoffmann, Darrin Lunde: Indochinese 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. 300.
Web links
- Crocidura indochinensis inthe IUCN Red List of Threatened Species 2013.2. Posted by: D. Lunde, 2008. Retrieved January 18, 2014.
supporting documents
- ↑ a b c d Robert S. Hoffmann, Darrin Lunde: Indochinese 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. 300.
- ↑ a b c d e Crocidura indochinensis in the Red List of Threatened Species of the IUCN 2013.2. Posted by: D. Lunde, 2008. Retrieved January 18, 2014.
- ↑ a b c d Crocidura indochinensis ( Memento of the original dated February 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 .
