Siamese horseshoe bat

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Siamese horseshoe bat
Systematics
Superordinate : Laurasiatheria
Order : Bats (chiroptera)
Superfamily : Horseshoe bat (Rhinolophoidea)
Family : Rhinolophidae
Genre : Horseshoe bat ( Rhinolophus )
Type : Siamese horseshoe bat
Scientific name
Rhinolophus siamensis
( Gyldenstolpe , 1917)

The Siamese horseshoe bat ( Rhinolophus siamensis ) is a species of bat belonging to the horseshoe bat family .

features

The Siamese horseshoe bat is a small species and reaches a head-torso length of 38 mm, a tail length of 14 mm, a hind foot length of 8 to 9 mm, an ear length of 19 to 22 mm, a forearm length of 36 to 41 mm and a skull length of 17 to 18 mm. The ears are large in relation to the body. The antitragus is small. The width of the face (cheekbone width) is 8.2 mm and the jaw length is 6 to 7 mm. The third metacarpal is slightly shorter than the fourth and fifth. The fur is short but not woolly. The top is light brown and the bottom is beige. The large nasal sheet covers the upper lip. The broad and rounded saddle is well covered with hair. The lancet is triangular and connected with a rounded upper process. The lower lip has three notches. The first molar in the upper row of teeth has a cusp. The third lower molar is small and is outside the row of teeth.

Distribution area

The distribution area extends from Yunnan in China , via Vietnam and Laos to Thailand .

Way of life and habitat

The ringing frequency is 51 kHz. Little is known about the way of life and habitat. The species usually occurs in small numbers. The roosts are in caves or mines, which they often share with other bat species.

Systematics

The Siamese horseshoe bat belongs to the species group of the large-eared horseshoe bat ( Rhinolophus philippinensis ). It was described in 1917 as a subspecies of the long-eared horseshoe bat ( Rhinolopus macrotis ) and has been recognized as an independent species since 1999. Both taxa differ in size and in the calling frequency. In Laos and Vietnam they have a sympatric distribution area.

literature

  • Andrew T. Smith, Yan Xie: A Guide to the Mammals of China , Princeton University Press, Princeton, 2008. ISBN 978-0691099842 : p. 342
  • Libiao Zhang, Gareth Jones, Jinshuo Zhang, Guangjian Zhu, Stuart Parsons, Stephen J. Rossiter, and Shuyi Zhang: Recent Surveys of Bats (Mammalia: Chiroptera) from China. I. Rhinolophidae and Hipposideridae In: Acta Chiropterologica, 11 (1). Museum and Institute of Zoology, Polish Academy of Sciences, 2009: pp. 71-88.

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