Red squirrel
| Red squirrel | ||||||||||||
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Orange-bellied Himalayan squirrel ( Dremomys lokriah ) |
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| Scientific name | ||||||||||||
| Dremomys | ||||||||||||
| Heude , 1898 |
The red-cheeked squirrels ( Dremomys ) are a common genus of squirrels in East and Southeast Asia . They are inhabitants of tropical rainforests and temperate deciduous forests. They are most commonly found at high altitudes of up to 3400 m. In the forests, they inhabit the soil and the lower regions of the trees. Here they look for nuts, fruits and, by the way, insects.
features
The head body length is around 20 cm, the tail is around 15 cm long. The coat color of these squirrels is inconspicuous gray-brown, sometimes with an olive or reddish shade. The underside is whitish or yellowish. It is named after the slightly lighter spots on the sides of the head, which can be red-brown, but often stand out so little that they are barely recognizable. Some species have reddish-brown body parts, especially the chin, throat and neck can stand out reddish against the back and peritoneum. The tail of the animals is long-haired, but not bushy, and they have no pronounced tufts of hair on the tips of the ears.
| 1 | · | 0 | · | 2 | · | 3 | = 22 |
| 1 | · | 0 | · | 1 | · | 3 |
The skull has a long and narrow rostrum, which tapers towards the tip of the snout, as the most striking distinguishing feature from other genera. The length of the frontal and orbital regions is usually less than 30% of the total length of the skull, and the nasals are longer than the width of the interorbital taper. The skull is round and convex All species of the genus have a a maxillary per half incisor tooth formed incisor (incisor) to which a tooth gap ( diastema follows). This is followed by two premolars and three molars . In contrast, only one premolar is formed in the lower jaw. In total, the animals have a set of 22 teeth. The anterior upper premolar is well developed and as large as the following and the molars of the upper jaw. The penis bone is slightly curved but does not form a pronounced angle.
Way of life
The animals of this genus are principally tree-living, but also come to the ground (semi- arboricol ). The most striking thing about these animals are the piercing and loud calls that can be heard from afar in the forest.
Systematics
There are currently five species in this genus:
- European robin , Dremomys gularis Osgood , 1932 - Yunnan , northern Vietnam
- Orange-bellied Himalayan squirrel , Dremomys lokriah ( Hodgson , 1836 ) - Eastern Himalayas
- Perny long-nosed squirrel , Dremomys pernyi ( Milne Edwards , 1867 ) - Central and South China , northern Myanmar , northern Vietnam
- True red squirrel , Dremomys rufigenis ( Blanford , 1878 ) - Central and South China, Southeast Asia
- Chinese red squirrel , Dremomys pyrrhomerus ( Thomas , 1895 ) - Central and Southeast China to the Vietnamese border area and Hainan.
The Borneo mountain squirrel was also placed in this genus, which , however, according to recent molecular biological investigations, is closely related to the species of the Sunda tree squirrel ( Sundasciurus ) and is accordingly assigned to this genus as Sundasciurus everetti .
supporting documents
- ↑ a b c d e f Robert S. Hoffmann, Andrew T. Smith: Genus Dremomys. 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. 185.
- ^ Robert S. Hoffmann, Andrew T. Smith: Subfamily Callosciurinae. 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. 182.
- ↑ JJ Koprwski, EA Goldstein, KR Bennett, C. Pereira Mendes: Genus Dremomys. In: Don E. Wilson, TE Lacher, Jr., Russell A. Mittermeier (editors): Handbook of the Mammals of the World: Lagomorphs and Rodents 1. (HMW, Volume 6), Lynx Edicions, Barcelona 2016; Pp. 722-723. ISBN 978-84-941892-3-4
- ↑ Melissa TR Hawkins, Kristofer M. Helgen, Jesus E. Maldonado, Larry L. Rockwood, Mirian TN Tsuchiya, Jennifer A. Leonard: Phylogeny, biogeography and systematic revision of plain long-nosed squirrels (genus Dremomys, Nannosciurinae). Molecular Phylogenetics and Evolution, online October 31, 2015. doi : 10.1016 / j.ympev.2015.10.023
- ↑ JJ Koprwski, EA Goldstein, KR Bennett, C. Pereira Mendes: Bornean Mountain Ground Squirrel; Sundasciurus everetti. In: Don E. Wilson, TE Lacher, Jr., Russell A. Mittermeier (editors): Handbook of the Mammals of the World: Lagomorphs and Rodents 1. (HMW, Volume 6), Lynx Edicions, Barcelona 2016; Pp. 728-729. ISBN 978-84-941892-3-4
literature
- JJ Koprwski, EA Goldstein, KR Bennett, C. Pereira Mendes: Bornean Mountain Ground Squirrel; Sundasciurus everetti. In: Don E. Wilson, TE Lacher, Jr., Russell A. Mittermeier (editors): Handbook of the Mammals of the World: Lagomorphs and Rodents 1. (HMW, Volume 6), Lynx Edicions, Barcelona 2016; Pp. 728-729. ISBN 978-84-941892-3-4
- Ronald M. Nowak: Walker's Mammals of the World. 2 volumes. 6th edition. Johns Hopkins University Press, Baltimore MD et al. 1999, ISBN 0-8018-5789-9 .
- Richard W. Thorington Jr., John L. Koprowski, Michael A. Steele: Squirrels of the World. Johns Hopkins University Press, Baltimore MD 2012; P. 157 ff. ISBN 978-1-4214-0469-1
