Panama pygmy pouch rat
| Panama pygmy pouch rat | ||||||||||||
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| Marmosa isthmica | ||||||||||||
| Goldman , 1912 |
The Panama pygmy sac rat ( Marmosa isthmica ) is a species of marsupial found in Panama, in Colombia west of the Río Cauca, and in western Ecuador .
description
The animals reach a head trunk length of 11.5 to 20 (males) or 10.5 to 18.2 cm (females), have a length of 16 to 25.3 (males) or 15 to 22.9 cm (females) Tail and reach a weight of 52 to 143 g (males) and 40 to 93 g (females). The tail is thus on average around 30% longer than the head and torso combined. The fur on the back and the top of the head are light or dark orange in color, the sides of the body are slightly lighter than the back. The middle of the snout is lighter than the top of the head. Around the black eyes there are blackish-brown to blackish circles under the eyes that do not reach the bases of the ears. The fur on the underside from the chin to the anus is yellowish or orange. The sides of the peritoneum are gray. The front and rear feet are yellowish or orange-brown. The 10% of the tail, which is close to the body, is hairy, the rest is hairless. The bare tail section is brownish on top and lighter on the underside. 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 animals is so far unknown.
Habitat and way of life
The Panama pygmy bag rat lives in lowland rainforests, moist mountain forests, dry forests and mangrove forests from sea level to altitudes of 1700 meters. It is active at night and at dusk and feeds mainly on insects, as well as fruits. Stomach examinations revealed remains of ants and other insects, fig seeds and unidentifiable components of fruits. Females give birth to pups once or twice a year. A litter consists of 6 to a maximum of 13 young animals. In Panama, 31 to 220 individuals live on an area of one km².
status
The Panama dwarf pouch rat has not yet been recorded separately by the IUCN , as it was considered a subspecies of Robinson's dwarf pouch rat ( Marmosa robinsoni ) for a long time and only became an independent species again in 2010 as part of a revision of the genus Marmosa .
supporting documents
- ↑ a b c d 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 137.
- ↑ Rogério V. Rossi, Robert S. Voss, Darrin P. Lunde: A Revision of the Didelphid Marsupial Genus Marmosa Part 1. The Species in Tate's 'Mexicana' and 'Mitis' Sections and Other Closely Related Forms. Bulletin of the American Museum of Natural History, 82 (11): 1-83 (2010). doi: 10.1206 / 334.1