Pampas fat-tailed pouch rat
| Pampas fat-tailed pouch rat | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Thylamys citellus | ||||||||||||
| ( Thomas , 1912) |
The pampas fat- tailed rat ( Thylamys citellus ) occurs in the north of Argentina in the provinces of Corrientes and Entre Ríos .
description
The animals reach a head trunk length of 9.9 to 11.5 cm, have a 10.2 to 12.5 cm long tail and reach a weight of 55 to 66 g. The tail is usually 105% of the length of the head and, in its function as a fat store, can reach a diameter of 6 to 7 mm. The fur on the back and the top of the head are cinnamon brown, the sides of the body are lighter gray-brown. As usual with fat-tailed rats, the hair is banded with three different color zones. The 8 to 9 mm long hair on the back has a gray base, followed by a narrow brownish zone and cream-colored brown tips. The peritoneum is cream-colored to whitish with a yellowish tinge, the abdominal hair is 7 to 8 mm long. The eyes are surrounded by narrow black rings that extend with a tail towards the nose. The ears are relatively large, rounded, yellowish at the base and dark brown at the tip. Front and rear paws are relatively large and whitish. The females do not have a pouch. The number of teats is 13, six on each side and one in the middle. The karyotype of the pampas fat-tailed pouch rat is unknown.
Habitat and way of life
The pampas fat-tailed pouch rat occurs in the Argentine wet pampas between Río Paraná and Río Uruguay , in a region known as Mesopotamia in Argentina . There it lives in seasonally flooded forests, savannas and open grassland, in swamps with palm trees , in gallery forests and in some places in dry forests . So far, no information is available about their diet, their activity patterns and their reproductive behavior.
Systematics
The author of the first description of the pampas fat- tailed pouch rat is the British zoologist Oldfield Thomas , who described it in 1912 under the name Marmosa citella and named the Argentine city of Goya as Terra typica . Today the species is placed in the genus of the fat- tailed pouch rats ( Thylamys ). Within the genus Thylamys , the pampas fat-tailed-pouch rat, together with the Chaco-fat- tailed-pouch rat ( Thylamys pusillus ) and the beautiful fat- tailed-pouch rat ( Thylamys pulchellus ), form a clade (Chaco clade) of closely related species.
status
The IUCN estimates the endangered status of the pampas fat-tailed rat as Least Concern . Distribution area and population are large and the animals also occur in a protected area with the El Palmar National Park .
supporting documents
- ↑ a b c d e f 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 177.
- ↑ R. Eduardo Palma, Dusan Boric Bargetto, Pablo Jayat, David A. Flores et a .: Molecular phylogenetics of mouse opossums: new findings on the phylogeny of Thylamys (Didelphimorphia, Didelphidae). Zoologica Scripta 43 (3): 217-234 January 2014, PDF
- ↑ Thylamys citellus in the endangered Red List species the IUCN 2016 Posted by: Carmignotto, AP, Costa, LP & Astua de Moraes, D., 2016. Accessed March 15, 2020th