Northern narrow-pouch rat
| Northern narrow-pouch rat | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Gracilinanus marica | ||||||||||||
| ( Thomas , 1898) |
The northern narrow-pouch rat ( Gracilinanus marica ), also called Colombian narrow-pouch rat , occurs in the northwest of South America from the Colombian department of La Guajira to the north of Venezuela.
description
The animals reach a head trunk length of 9.6 to 11.6 cm and have a 13.1 to 15.1 cm long tail and reach a weight of 24 to 30 g. The tail is usually 130% of the length of the head body. The back, top of the head and sides of the body are solid brown to reddish brown. The fur is a little lighter between the eyes, which are surrounded by narrow dark rings. The peritoneum is brownish and contrasts only slightly with the fur on the back. The fur is long, woolly and silky. The hair on the back is about 10 mm long. The feet are brownish. The tail is light brown on the top and whitish on the underside. Females do not have a pouch. The number of teats is eleven, five on each side and one in the middle. The karyotype of the narrow-pouch rat is unknown.
Habitat and way of life
The northern narrow-pouch rat occurs in moist evergreen rainforests, in dry forests and savannas from sea level up to heights of 2590 meters. It is probably arboreal. All specimens caught so far have been caught on trees. So far nothing is known about their other behavior, their diet, their activity patterns and their reproductive biology.
Systematics
The author of the first description of the northern narrow-pouch rat is the British zoologist Oldfield Thomas , who described it in 1898 under the name Marmosa marica and gave the place R. Albarregas in the Venezuelan state of Mérida as Terra typica . Due to differences in the structure of the skull and the teeth, the genus Gracilinanus was introduced in 1989 , to which the members of the Microtarsus group of the genus Marmosa and thus also the Colombian narrow-pouch rat were placed.
status
The IUCN assesses the endangered status of the northern narrow-pouch rat as Least Concern . The population is likely to be large, the animals are found in some protected areas, and they do not tolerate excessive degradation of their habitat by humans.
supporting documents
- ↑ a b c d e Diego Astúa: Family Didelphidae (Opossums). in Don E. Wilson , Russell A. Mittermeier : Handbook of the Mammals of the World - Volume 5. Monotremes and Marsupials. Lynx Editions, 2015, ISBN 978-84-96553-99-6 . Page 172.
- ↑ Gardner, AL & Creighton, GK 1989. A new generic name for Tate's (1933) Microtarsus group of South American mouse opossums (Marsupialia: Didelphidae). Proceedings of the Biological Society of Washington 102 (1): 3-7.
- ↑ gracilinanus marica in the endangered Red List species the IUCN 2016 Posted by: Perez-Hernandez, R., Ventura, J. & López Fuster, M., 2015. Accessed January 25, 2020th