Medium whiskered bat
| Medium whiskered bat | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Myotis annectans | ||||||||||||
| ( Dobson , 1871) |
The common bearded bat ( Myotis annectans ) is a species of mouse ears ( Myotis ) within the bats (Chiroptera). It is distributed over parts of South and Southeast Asia from India to Vietnam .
features
The middle whiskered bat reaches a head-trunk length of 45 to 55 millimeters and a tail length of 39 to 48 millimeters. The hind feet are about 10 millimeters long. The ears measure 14 to 16 millimeters, they are comparatively small and rounded with a large tragus . Overall, it is a medium-sized bat species. The forearm length is 45 to 48 millimeters. The back fur is long and soft. It's dark brown on the back and brown on the belly with lighter tips of hair. The face is also covered with dark brown hair.
The skull has a total length of 15 to 17 millimeters and is robustly built with a wide snout region (rostrum). The second upper premolar is very small and is completely covered by the other teeth.
distribution
The common bearded bat is common in several separate regions across parts of South and Southeast Asia from India to Thailand . In India the species occurs in Assam , Nagaland and West Bengal . In the People's Republic of China , it was found in Yunnan near the border with India. In Southeast Asia, occurrences in northern Thailand, Laos and southern Cambodia are documented, in Vietnam the occurrence is unclear.
Way of life
Very little information is available about the lifestyle and ecological demands of the widespread bat species. Most of the evidence comes from medium-high altitudes and valley areas. In Southeast Asia the species lives in evergreen forests. In Vietnam, there is likely evidence in a secondary forest near a watercourse.
Systematics
The common bearded bat is assigned to the mouse ears (genus Myotis ) as an independent species . The first scientific description comes from George Edward Dobson from 1871, who described it on the basis of individuals from the Naga Hills of the Indian state of Assam . In earlier work, the species was placed in the genus Pipistrellus due to missing teeth , but the type used for this did not correspond to the norm. Accordingly, it was transferred to the genus Myotis after 1970 . The originally independent species Myotis primula Thomas, 1920 and Myotis emarginatus (Geoffroy, 1806) were classified as synonyms .
Apart from the nominate form, no subspecies are distinguished within the species .
Hazard and protection
The species is classified by the International Union for Conservation of Nature and Natural Resources (IUCN) as not endangered ("least concern") due to its large distribution area and the associated high population numbers. There are no known threats to the species population. There is no information on the size of the population in South Asia, in the Southeast Asian distribution areas it is a regularly occurring species.
supporting documents
- ↑ a b c d e f Don E. Wilson Hairy-Faced Myotis. In: Andrew T. Smith , Yan Xie: A Guide to the Mammals of China. Princeton University Press, 2008; P. 373, ISBN 978-0-691-09984-2 .
- ↑ a b c d e f g h Myotis annectans in the Red List of Endangered Species of the IUCN 2017-3. Listed by: P. Bates, C. Francis, S. Molur, C. Srinivasulu, 2008. Retrieved January 8, 2018.
- ^ A b c Don E. Wilson & DeeAnn M. Reeder (eds.): Myotis annectans in Mammal Species of the World. A Taxonomic and Geographic Reference (3rd ed).
literature
- Don E. Wilson Hairy-Faced Myotis. In: Andrew T. Smith , Yan Xie: A Guide to the Mammals of China. Princeton University Press, 2008; P. 373, ISBN 978-0-691-09984-2 .
Web links
- Myotis annectans inthe IUCN 2017-3 Red List of Threatened Species . Listed by: P. Bates, C. Francis, S. Molur, C. Srinivasulu, 2008. Retrieved January 8, 2018.