Naked-tailed woolly dwarf pouch rat
| Naked-tailed woolly dwarf pouch rat | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Marmosa rutteri | ||||||||||||
| Thomas , 1924 |
The naked- tailed woolly pygmy pygmy rat ( Marmosa rutteri ), also called nudy-tailed pygmy pygmy rat , is a species of mammal belonging to the genus of pygmy pygmy rats , which is widespread in the western Amazon basin.
features
The animals are relatively large dwarf sac rats. Males of the naked-tailed woolly dwarf pouch rat reach a head body length of 16.4 to 24 cm, and have a 25.2 to 29.1 cm long tail, 25 to 33 mm long hind feet and 24 to 28 mm long ears. Their weight is between 148 and 180 g. Females are slightly smaller with head rump lengths of 15.2 to 19.7 cm, 22.5 to 26.9 cm long tails and weights of 63 to 151 g. Their hind feet are 25 to 30 mm long and their ears 24 to 28 mm. The animals resemble the white-bellied woolly dwarf rat ( Marmosa constantiae ), but in contrast to this species, they have a shorter coat, a monochrome yellow peritoneum and a short hairy tail base. The base of the tail of Marmosa rutteri is only about 16 mm hairy and the hair is only 5 mm long, while the hairy zone of the white-bellied woolly dwarf rat is about 28 mm long and covered with 10 mm long hair. The yellowish fur of the underside of Marmosa rutteri also extends to the chin, chest, groin, and the insides of the limbs. The tail is one color dark.
Way of life
The bare-tailed woolly dwarf bag rat occurs on the eastern slopes of the Andes in moist tropical forests and in secondary forests and in western Brazil in the Várzea and in Terra Firme forests. The animals are nocturnal and predominantly arboreal (tree-dwelling). Little is known about the diet and reproduction of the opossum. Like other pygmy sac rats, they likely feed on insects and fruits. Females caught with pups had six to eight pups.
Systematics
Marmosa rutteri was first described scientifically in 1924 by the British zoologist Oldfield Thomas . The holotype comes from the eastern bank of the Río Ucayali . The Anglo-American zoologist George Henry Hamilton Tate made the species a subspecies of Marmosa germana (Thomas, 1904) and later it was synonymous with Marmosa germana . The American zoologist Alfred L. Gardner finally used the designation Marmosa regina (Thomas, 1898) for the species, which was adopted in the marsupial volume of the Handbook of the Mammals of the World , a standard work on mammalogy , and a few other works. However, this is not taxonomically justifiable, since the Terra typica of Marmosa regina is in the valley of the Río Magdalena in Colombia and not in Amazonia. In a survey of the opossum fauna in the area of Rio Javari and Río Ucayali in eastern Peru published in mid-2019 by the opossum expert Robert Voss and colleagues, the species was renamed Marmosa rutteri again . DNA tests clearly show that Marmosa regina is an independent species that is more closely related to Marmosa rapposa than to Marmosa germana . Different haplogroups were found in specimens of Marmosa rutteri north and south of the Amazon .
Individual evidence
- ^ A b c d Robert S. Voss, David W. Fleck and Sharon A. Jansa: Mammalian Diversity and Matses Ethnomammalogy in Amazonian Peru Part 3: Marsupials (Didelphimorphia). Bulletin of the American Museum of Natural History, 2019 (432): 1-90. doi: 10.1206 / 0003-0090.432.1.1 , pages 29-32.
- ↑ a b Diego Astua: Family Didelphidae (possums). 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 142.