White-toothed shrews

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White-toothed shrews
Garden shrew (Crocidura suaveolens)

Garden shrew ( Crocidura suaveolens )

Systematics
Subclass : Higher mammals (Eutheria)
Superordinate : Laurasiatheria
Order : Insect eater (Eulipotyphla)
Family : Shrews (Soricidae)
Subfamily : Crocidurinae
Genre : White-toothed shrews
Scientific name
Crocidura
Wagler , 1832

The genus of Weißzahn- or batting shrews ( Crocidura ) is a mammalian species from the family of shrews (Soricidae). In a broader sense, this name is applied to the subfamily of the Crocidurinae . With almost 200 species it is the most species-rich genus of mammals, three species (the field shrew , the house shrew and the garden shrew ) also live in Central Europe.

features

The fur of these shrews is dense and silky, it is colored brown, gray or black on the upper side, the underside is lighter. The tail is long and, like the back of the body, eyelashed. The claws are short compared to other shrew species, the 28 teeth are colored white. These shrews reach head body lengths of 4 to 18 centimeters with a tail of 4 to 11 centimeters. The weight varies from 3 to 65 grams depending on the species.

distribution and habitat

White-toothed shrews are restricted to the Old World, they are found in Eurasia and Africa , and the greatest biodiversity is in central Africa . They inhabit a variety of habitats, for example forests and grasslands, but also fields and sometimes invade buildings.

Way of life

Like all shrews, they feed mainly on invertebrates (e.g. insects and earthworms ) and are characterized by a high metabolic rate. So they consume almost their own body weight in food every day. They are very fertile, two to ten young animals are born once or several times a year after a gestation period of around three to four weeks.

threat

Particularly some species with a small range are threatened. Directly threatened with extinction ( critically endangered are), according to IUCN C. dhofarensis , C. Harenna , C. negrina , C. thomensis and C. wimmeri and additionally there is the on the Christmas Island endemic type C. trichura that may already be extinct. 15 species are endangered and 20 are endangered ( vulnerable ), but precise data are lacking for some species.

The species

A total of almost 200 species are distinguished. Three species live in Central Europe:

  • the field shrew ( Crocidura leucodon ),
  • the house shrew ( Crocidura russula ) as well
  • the garden shrew ( Crocidura suaveolens )

Four other species, C. sicula (in Sicily ), C. ichnusae (in Sardinia ), C. canariensis (in the Canary Islands ) and C. zimmermanni (in Crete ) are native to southern Europe. Most of the species live in Africa (around a hundred species are restricted to central or southern Africa) or in Southeast Asia (where there are several endemic species in the Philippines , Indonesia, and the Andaman and Nicobar Islands ). The following list follows Wilson & Reeder (2005) and reflects new discoveries:

Genetic studies suggest that there are other previously undescribed species on some islands in Southeast Asia.

literature

Individual evidence

  1. ^ CJ Burgin and K. He: Family Soricidae (shrews). In: Don E. Wilson and Russell A. Mittermeier (eds.): Handbook of the Mammals of the World. Volume 8: Insectivores, Sloths and Colugos. Lynx Edicions, Barcelona 2018, pp. 332–551 ISBN 978-84-16728-08-4
  2. a b Leonid A. Lavrenchenko, Leonid L. Voyta and Rainer Hutterer: Diversity of shrews in Ethiopia, with the description of two new species of Crocidura (Mammalia: Lipotyphla: Soricidae). Zootaxa 4196 (1), 2016, pp. 38-60
  3. Heng Zhang, Guiyou Wu, Yanqing Wu, Jianfei Yao, Shuo You, Chencheng Wang, Feng Cheng, Jingjing Chen, Mingxia Tang, Chunlin Li and Baowei Zhang: A new species of the genus Crocidura from China based on molecular and morphological data ( Eulipotyphla: Soricidae). Zoological Systematics 44 (4), 2019, pp. 279–293, doi: 10.11865 / zs.201927
  4. ^ A b Rainer Hutterer: Records of shrews from Panay and Palawan, Philippines, with the description of two new species of Crocidura (Mammalia: Soricidae). Lynx ns, 38, 2007, pp. 5-20
  5. ^ Jacob A. Esselstyn, Anang S. Achmadi, Heru Handika, Thomas C. Giarla and Kevin C. Rowe: A new climbing shrew from Sulawesi highlights the tangled taxonomy of an endemic radiation. Journal of Mammalogy 100 (6), 2019, pp. 1713-1725, doi: 10.1093 / jmammal / gyz077
  6. Suyama Meegaskumbura, Madhava Meegaskumbura, Rohan Pethiyagoda, Kelum Manamendra-Arachchi and Christopher J. Schneider: Crocidura hikmiya, a new shrew (Mammalia: Soricomorpha: Soricidae) from Sri Lanka. Zootaxa 1665, 2007, pp. 19-30
  7. Liu Yang, Heng Zhang, Chenling Zhang, Jun Wu, Zhaocheng Wang, Chunlin Li and Baowei Zhang: A new species of the genus Crocidura (Mammalia: Eulipotyphla: Soricidae) from Mount Huang, China. Zoological Systematics 45 (1), 2020, pp. 1–14, doi: 10.11865 / zs.202001
  8. a b c William T. Stanley, Rainer Hutterer , Thomas C. Giarla and Jacob A. Esselstyn: Phylogeny, phylogeography and geographical variation in the Crocidura monax (Soricidae) species complex from the montane islands of Tanzania, with descriptions of three new species . Zoological Journal of the Linnean Society 174, 2015, pp. 185-215
  9. Alexei V. Abramov, Paulina D. Jenkins, Viatcheslav V. Rozhnov and Alexei A. Kalinin: Description of a new species of Crocidura (Soricomorpha: Soricidae) from the island of Phu Quoc, Vietnam. Mammalia 72, 2008, pp. 269-272
  10. a b Paulina D. Jenkins, Alexei V. Abramov, Viatcheslav V. Rozhnov and Olga Makarova: Description of two new species of white-toothed shrews belonging to the genus Crocidura (Soricomorpha: Soricidae) fromNgoc Linh Mountain, Vietnam. Zootaxa 1589, 2007, pp. 57-68
  11. Terrence C. Demos, Anang S. Achmadi, Heru Handika, Maharadatunkamsi, Kevin C. Rowe, and Jacob A. Esselstyn: A new species of shrew (Soricomorpha: Crocidura) from Java, Indonesia: possible character displacement despite interspecific gene flow. Journal of Mammalogy 98 (1), 2017, pp. 183-193
  12. Terrence C. Demos, Anang S. Achmadi, Thomas C. Giarla, Heru Handika, Maharadatunkamsi, Kevin C. Rowe and Jacob A. Esselstyn: Local endemism and within-island diversification of shrews illustrate the importance of speciation inbuilding Sundaland mammal diversity. Molecular Ecology 25, 2016, pp. 5158-5173

Web links

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