Durango chipmunk
| Durango chipmunk | ||||||||||||
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| Tamias durangae | ||||||||||||
| ( JA Allen , 1903) |
The Durango chipmunk ( Tamias durangae , Syn .: Neotamias durangae ) is a type of squirrel from the genus of the chipmunk ( Tamias ). It occurs in two separate areas in northern Mexico .
features
The Durango chipmunk reaches an average head-torso length of about 13.5 to 22.7 centimeters, the tail is significantly shorter with about 10 centimeters and the weight is about 80 to 85 grams. The basic color of the animals is cinnamon brown, on the back there are - as is typical for the species - several dark back stripes, which are separated by lighter stripes and separated from the sides of the body. There are four light and five dark stripes, the middle of the dark stripes being darker and brownish than the outer ones. The outermost stripes are also significantly shorter. It differs from the very similar Buller chipmunk ( Tamias bulleri ) by the slightly lighter, cinnamon-colored base color and the red-brown underside of the tail.
distribution
The Durango chipmunk is found in two separate areas in northern Mexico . The distribution area of one population is in the southwest Chihuahua to the western Durango ; the second population lives in the southeast of Coahuila in the border area to Nuevo León and perhaps its area extends into this federal state.
Way of life
Durango chipmunks prefer to live in moderately dry mixed forests of pine, spruce and oak. Here comes Tamias durangae durangae mainly in pine-oak forests of the Sierra Madre Occidental and Tamias solivagus durangae with in pine-spruce stands American aspen ( Populus tremuloides ) above 2700 meters in the Sierra Madre Oriental ago.
Very little information is available about the lifestyle of the Durango chipmunk. Like other chipmunks, it is diurnal and primarily living on the ground. The animals feed also especially herbivores of the walnut fruit (acorns) of the oaks and the seeds of conifers.
Systematics
The Durango chipmunk is classified as an independent species within the genus of chipmunks ( Tamias ), which consists of 25 species. The first scientific description comes from the American naturalist Joel Asaph Allen from 1903, who described the species using individuals from the Sierra de Candella in Durango. Within the chipmunk group, the Durango chipmunk, along with most other species, is assigned to the subgenus Neotamias , which is also discussed as an independent genus.
Within the species, two subspecies are distinguished with the nominate form :
- Tamias durangae durangae : nominate form; occurs on the Sierra Madre Occidental in Chihuahua and in the adjacent Durango.
- Tamias durangae solivagus : occurs isolated in the southeast of Coahuila in the border area to Nuevo León in the Sierra Madre Oriental .
Status, threat and protection
The Durango chipmunk is classified by the International Union for Conservation of Nature and Natural Resources (IUCN) as "Least Concern" (LC). This is justified by the large distribution area and the assumed large population. There are no known risks to the company's existence.
supporting documents
- ↑ a b c d e Richard W. Thorington Jr. , John L. Koprowski, Michael A. Steele: Squirrels of the World. Johns Hopkins University Press, Baltimore MD 2012; P. 323. ISBN 978-1-4214-0469-1
- ↑ a b c Neotamias durangae in the IUCN Red List of Threatened Species 2015.4. Posted by: ST Álvarez-Castañeda, I. Castro-Arellano, T. Lacher, E. Vázquez, 2008. Retrieved May 29, 2016.
- ↑ a b Tamias (Neotamias) durangae In: Don E. Wilson , DeeAnn M. Reeder (Ed.): Mammal Species of the World. A taxonomic and geographic Reference. 2 volumes. 3. Edition. Johns Hopkins University Press, Baltimore MD 2005, ISBN 0-8018-8221-4 .
- ↑ Bruce D. Patterson, Ryan W. Norris: Towards a uniform nomenclature for ground squirrels: the status of the Holarctic chipmunks. Mammalia 80 (3), May 2016; Pp. 241-251 doi : 10.1515 / mammalia-2015-0004
literature
- Richard W. Thorington Jr. , John L. Koprowski, Michael A. Steele: Squirrels of the World. Johns Hopkins University Press, Baltimore MD 2012; P. 323. ISBN 978-1-4214-0469-1
Web links
- Neotamias durangae onthe IUCN Red List of Threatened Species 2015.4. Posted by: ST Álvarez-Castañeda, I. Castro-Arellano, T. Lacher, E. Vázquez, 2008. Retrieved May 29, 2016.