Duchaillu redshank squirrel
| Duchaillu redshank squirrel | ||||||||||||
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| Funisciurus duchaillui | ||||||||||||
| ( Sanborn , 1953) |
The Duchaillu redshank squirrel ( Funisciurus duchaillui ) is a species of squirrel from the genus of the redshank squirrel ( Funisciurus ). It occurs in central Gabon .
features
The Duchaillu redshank squirrel reaches an average head-trunk length of 18.5 to 21.2 centimeters, the tail is 19.0 to 23.0 centimeters long. The weight is around 180 to 220 grams. The rear foot length is 42 to 50 millimeters. It is a medium-sized squirrel with an olive-brown fur on the back. On the back there are two dark brown to black stripes on either side of the midline with brownish-yellow stripes in between, which extend from the head to the tail. The sides of the body are grayish white, the hair has a white tip. The peritoneum is gray with hair that has a gray tip. The head is olive-brown, the legs and feet are gray. The tail is as long as the head-trunk length. He is slim with long hair and bright red with a black tip. It is rolled over the body at rest.
| 1 | · | 0 | · | 2 | · | 3 | = 22 |
| 1 | · | 0 | · | 1 | · | 3 |
The skull has a total length of 46.9 to 48.3 millimeters and a width of 26.2 to 28.2 millimeters. Like all species of the genus has the type in the upper jaw half per one to a incisor tooth formed incisor (incisor) to which a tooth gap ( diastema follows). This is followed by two premolars and three molars . The teeth in the lower jaw correspond to those in the upper jaw, but only with a premolar. In total, the animals have a set of 22 teeth.
The Duchaillu redshank squirrel is similar to other redshank squirrels found in the same region and differs from them primarily in its size and color. The banded redshank squirrel ( Funisciurus lemniscatus ) has a conspicuous red to orange colored belly and is distributed over a larger area. The black and red bush squirrel ( Paraxerus lucifer ) and also the Lady Burton redshank squirrel ( Funisciurus isabella ) are somewhat smaller. In the former, the back fur is whitish to sand-colored and the back stripes do not extend to the tail. The Lady Burton redshank squirrel has a gray peritoneum and a white tip. Both species are more common than the Duchaillu bush squirrel.
distribution
The Duchaillu redshank squirrel occurs only in the rainforest of central Gabon south of the Ogooué and the Massif du Chaillu .
Way of life
Very little information is available about the way of life of the Duchaillu redshank squirrel. It lives only in rainforest areas and occurs mainly in habitats that are determined by trees from the families of the Cesalpiniaceae and Burseraceae . It lives solitary or, less often, in pairs. It mainly uses the lower tree population up to a height of six meters, but can also be seen in tree heights of over 25 meters. When threatened, the animals flee through the branches and into the higher tree regions, never on the forest floor. Like other squirrels of the genus, the herbivorous animals feed on fruits, among other things, and it has been observed how it eats fruits of Xylopia aethiopica and plants of the genus Dialium .
Systematics
The Duchaillu redshank squirrel is classified as an independent species within the genus of the redshank squirrel ( Funisciurus ), which consists of ten species. The first scientific description comes from the zoologist Colin Campbell Sanborn from 1953, who described the animals using an individual. The species was later regarded as a synonym for the Lady Burton redshank squirrel ( Funisciurus isabella ), but is now recognized as a valid species.
Apart from the nominate form, no further subspecies are distinguished within the species .
Status, threat and protection
The Duchaillu redshank squirrel is not classified in a hazard category by the International Union for Conservation of Nature and Natural Resources (IUCN) due to the limited amount of data available on occurrence, lifestyle and potential threats, but is listed as "data deficient".
supporting documents
- ↑ a b c d e f g h i j k David Brugière: Funisciurus duchaillui, Du Chaillu's Rope Squirrel. In: Jonathan Kingdon, David Happold, Michael Hoffmann, Thomas Butynski, Meredith Happold and Jan Kalina (eds.): Mammals of Africa Volume III. Rodents, Hares and Rabbits. Bloomsbury, London 2013, p. 54; ISBN 978-1-4081-2253-2 .
- ↑ a b c d e f Richard W. Thorington Jr. , John L. Koprowski, Michael A. Steele: Squirrels of the World. Johns Hopkins University Press, Baltimore MD 2012; P. 217. ISBN 978-1-4214-0469-1
- ↑ Peter Grubb: Genus Funisciurus, Rope Squirrels. In: Jonathan Kingdon, David Happold, Michael Hoffmann, Thomas Butynski, Meredith Happold and Jan Kalina (eds.): Mammals of Africa Volume III. Rodents, Hares and Rabbits. Bloomsbury, London 2013, pp. 46-48; ISBN 978-1-4081-2253-2 .
- ↑ a b Funisciurus duchaillui in the IUCN 2016-1 Red List of Endangered Species . Posted by: D. Happold, 2008. Retrieved September 6, 2016.
literature
- Richard W. Thorington Jr. , John L. Koprowski, Michael A. Steele: Squirrels of the World. Johns Hopkins University Press, Baltimore MD 2012; P. 217. ISBN 978-1-4214-0469-1
- David Brugière: Funisciurus duchaillui, Du Chaillu's Rope Squirrel. In: Jonathan Kingdon, David Happold, Michael Hoffmann, Thomas Butynski, Meredith Happold and Jan Kalina (eds.): Mammals of Africa Volume III. Rodents, Hares and Rabbits. Bloomsbury, London 2013, p. 54; ISBN 978-1-4081-2253-2 .
Web links
- Funisciurus duchaillui inthe IUCN 2016-1 Red List of Threatened Species . Posted by: D. Happold, 2008. Retrieved September 6, 2016.