Simon's dwarf bag rat
| Simon's dwarf bag rat | ||||||||||||
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| Systematics | ||||||||||||
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| Marmosa simonsi | ||||||||||||
| Thomas , 1899 |
Simon's dwarf rat ( Marmosa simonsi ) is a species of marsupial that occurs in western Ecuador and in the extreme northwest of Peru as well as on the Isla de Puná at the mouth of the Río Guayas in the Gulf of Guayaquil ( Pacific Ocean ).
description
The animals reach a head trunk length of 10.7 to 15.6 (males) or 9.8 to 14.5 cm (females), have a length of 14 to 18.9 (males) or 12.1 to 17 cm (females) ) long tail and reach a weight of 24 to 49 g. The tail is thus on average around 20% longer than the head and torso combined. The fur on the back and the top of the head are gray. A light stripe along the middle of the snout contrasts strikingly with the gray hair on the head. Around the black eyes there are blackish-brown to blackish circles under the eyes, which often extend to the bases of the ears. The cheeks are gray. The peritoneum is yellowish. The sides of the peritoneum, the sides of the neck, the groin, and the insides of the front and rear legs are gray. The front and rear feet are whitish or light yellowish. 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 light on the underside. The last third of the tail is whitish. Females do not have a pouch. The number of teats and the karyotype of the animals are currently unknown.
Habitat and way of life
Simon's pygmy rat lives from sea level up to heights of 1600 meters. There is a multitude of different biotopes in their habitat, including mangrove forests , lowland rainforests, moist mountain forests and dry forests . Most of the specimens have so far been caught in mangrove forests and dry forests. So far, nothing is known about the behavior of Simon's pygmy rat, their activity patterns, their diet and their reproductive biology.
status
Simon's dwarf sac rat has not yet been recorded separately by the IUCN , as it was long considered a subspecies of Robinson's dwarf rat ( Marmosa robinsoni ) 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