Vietnam dwarf bilch

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Vietnam dwarf bilch
Systematics
Order : Rodents (Rodentia)
Subordination : Mouse relatives (Myomorpha)
Superfamily : Mice-like (Muroidea)
Family : Stachelblche (Platacanthomyidae)
Genre : Typhlomys
Type : Vietnam dwarf bilch
Scientific name
Typhlomys chapensis
Osgood , 1932

The Vietnam dwarf bilch ( Typhlomys chapensis ) is a barely researched rodent species from the family of stachelbilche (Platacanthomyidae). It is often considered a subspecies of the Chinese dwarf bilch ( Typhlomys cinereus ). Studies from 2014 and 2017 came to the conclusion, however, that the genetic differences between T. chapensis and T. cinereus are so great that a species status can be supported. Its distribution area is in the Chinese province of Yunnan and in the Vietnamese province of Lào Cai . The Vietnam dwarf bilch is known of only 14 specimens.

features

The Vietnam dwarf bilch is larger than the Chinese dwarf bilch and the dwarf bilch . It reaches a head-trunk length of 61 to 115 mm, a tail length of 80 to 126 mm and a weight of up to 22.6 g. The back fur is dark gray to black, the peritoneum is yellowish-white. The large ears have no fur. The eyes are very small. The whiskers are long. The long tail fur is slightly brush-shaped at the base. The heavily brushed tip of the tail looks like a bottle brush on the surface. In several of the specimens examined, the tip of the tail had white hair. The cranium is dome-shaped.

Distribution area

The distribution area extends west of the Red River in the southwest of the Chinese province of Yunnan to the province of Lào Cai in northwest Vietnam.

habitat

The Vietnam dwarf bilch lives in tropical mountain forests at altitudes above 200 m.

Way of life

The way of life of the Vietnam dwarf bilge has been little researched. It is likely nocturnal and feeds on grains and fruits. Behavioral studies of wild-caught animals in laboratory cages suggest that this species ultrasound - echolocation used to orient themselves between the tree branches. Like the Chinese dwarf bilch, the Vietnam dwarf bilch can be found on low branches in trees or on the ground.

status

In 1996 the Vietnam dwarf bilk was in the “ critically endangered ” category on the Red List of Threatened Species . In 2005 it was synonymous with the Chinese dwarf bilch by Michael D. Carleton and Guy G. Musser and in 2008 by the IUCN .

literature

  • Wilfred Hudson Osgood: Mammals of the Kelley-Roosevelts and Delacour Asiatic expeditions. Field Museum of National History, Publication 312, Zoological Series 18 (10), pp. 193-339.
  • Alexei V Abramov, Alexander E Balakirev and Viatcheslav V Rozhnov: An enigmatic Pygmy Dormouse: Molecular and Morphological Evidence for the Species Taxonomic Status of Typhlomys chapensis (Rodentia: Platacanthomyidae). Zoological Studies. 53, 2014, p. 34. doi: 10.1186 / s40555-014-0034-2
  • Feng Cheng, Kai He, Zhong-Zheng Chen, Bin Zhang, Tao Wan, Jia-Tang Li, Bao-Wei Zhang and Xue-Long Jiang: Phylogeny and systematic revision of the genus Typhlomys (Rodentia, Platacanthomyidae), with description of a new species. Journal of Mammalogy 98 (3), 2017, pp. 731-743. doi: 10.1093 / jmammal / gyx016
  • Thomas Giarla: Family Platacanthomyidae (Tree Mice) In: Don E. Wilson, Thomas E. Lacher, Jr and Russell A. Mittermeier: Handbook of the Mammals of the World. Volume 7: Rodents II. Lynx Edicions, Barcelona, ​​2017. ISBN 978-84-16728-04-6 , p. 113

Individual evidence

  1. ↑ Alexei V Abramov, Alexander E Balakirev and Viatcheslav V Rozhnov: An enigmatic Pygmy Dormouse: Molecular and Morphological Evidence for the Species Taxonomic Status of Typhlomys chapensis (Rodentia: Platacanthomyidae). Zoological Studies. 53, 2014, p. 34. doi: 10.1186 / s40555-014-0034-2
  2. ↑ Feng Cheng, Kai He, Zhong-Zheng Chen, Bin Zhang, Tao Wan, Jia-Tang Li, Bao-Wei Zhang and Xue-Long Jiang: Phylogeny and systematic revision of the genus Typhlomys (Rodentia, Platacanthomyidae), with description of a new species. Journal of Mammalogy 98 (3), 2017, pp. 731-743. doi: 10.1093 / jmammal / gyx016
  3. ↑ EDGE of Existence: 1685. Sort-furred Tree Mouse (Typhlomys cinereus)
  4. ↑ Aleksandra A. Panyutina, Alexander N. Kuznetsov, Ilya A. Volodin, Alexey V. Abramov and Irina B. Soldatova. 2017. A Blind Climber: The First Evidence of Ultrasonic Echolocation in Arboreal Mammals. Integrative Zoology. 12 (2); 172-184. DOI: 10.1111 / 1749-4877.12249
  5. ↑ Ulf Gärdenfors, AJ Stattersfield: 1996 IUCN Red List of Threatened Animals , 1996, p. 27
  6. ↑ Wilson, Don E., and DeeAnn M. Reeder, eds. (2005), Mammal Species of the World: A Taxonomic and Geographic Reference , 3rd Edition, Typhlomys cinereus
  7. ↑ Typhlomys cinereus in the IUCN Red List of Threatened Species 2017.1. Listed by: D. Lunde & AT Smith, 2008. Retrieved May 25, 2017.