Tucuman comb rat
| Tucuman comb rat | ||||||||||||
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Tucuman crested rat ( Ctenomys tucumanus ) |
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| Ctenomys tucumanus | ||||||||||||
| Thomas , 1900 |
The Tucumán crested rat ( Ctenomys tucumanus ) is a type of crested rat . The species was first scientifically described in 1900 by Oldfield Thomas from the north of Argentina and occurs only in the province of Tucumán around the city of San Miguel de Tucumán .
features
The Tucumán comb rat reaches a head-trunk length of about 17.2 centimeters and a tail length of 71 millimeters. The rear foot length with the claw is about 30.5 millimeters. It is a small to medium-sized species of the genus. The back fur is light fawn brown with light reddish washings. The face is dark in color, but the cheeks match the back color and under the ears they have a slightly lighter spot. The ventral side is pale sand colored, the hair of the peritoneum has a gray base. The animals have lighter to white spots in the armpits and lumbar region. The tops of the hind feet are almost bare and covered with only a few light hairs. The tail is very thinly covered with a few whitish hairs that form a slight comb near the tip.
The skull is broad and flat. The nasal bones are comparatively long and not tapered, they reach to the antorbital region. The interorbital region and the skull are flat
The karyotype consists of a chromosome set of 2n = 28 chromosomes (FN = 52). The sperm are built symmetrically.
distribution
The Tucumán crested rat lives in northern Argentina , where it is limited to the region around San Miguel de Tucumán in the Tucumán province .
Way of life
The animals live in the moist soil at the edge of the forest and in clearings. Like all other crested rats, she lives on the ground and digs in the ground. It is a herbivorous species that uses underground tubers and roots. Beyond that, no information is available about the way of life of the animals.
Systematics
The Tucumán crested rat is classified as an independent species in the genus of crested rats ( Ctenomys ). This consists of about 70 species. The first scientific description of the species comes from the British zoologist Oldfield Thomas from 1900, who described it using a male individual from the area near the city of San Miguel de Tucumán and named it after the region.
The species was due to molecular biological features with several close relatives in Argentina tucumanus associated group of species within the genus. It was partially assigned to the Mendoza crested rat ( Ctenomys mendocinus ) as a subspecies. Apart from the nominate form, no further subspecies are distinguished within the species .
Status, threat and protection
The Tucumán comb rat is not listed in a hazard category by the International Union for Conservation of Nature and Natural Resources (IUCN), as insufficient data are available for this; it is thus listed as “data deficient”.
supporting documents
- ↑ a b c d e f g h i Tucuman Tuco-tuco. In: TRO Freitas: Family Ctenomyidae In: Don E. Wilson, TE Lacher, Jr., Russell A. Mittermeier (editor): Handbook of the Mammals of the World: Lagomorphs and Rodents 1. (HMW, Volume 6) Lynx Edicions, Barcelona 2016, p. 517. ISBN 978-84-941892-3-4 .
- ^ A b c d Claudio J. Bidau Ctenomys tucumanus Thomas, 1900. In: Family Ctenomyidae Lesson, 1842. In: JL Patton, UFJ Pardiñas, G. D'Elía: Mammals of South America. The University of Chicago Press, 2015; Pp. 818-877. ISBN 978-0-226-16957-6 .
- ↑ a b Ctenomys tucumanus in the endangered Red List species the IUCN 2019. Posted by: R. Ojeda, 2016. Retrieved on June 8 of 2019.
- ↑ Ctenomys tucumanus in Mammal Species of the World , 2005; accessed on June 8, 2019.
- ↑ Andrés Parada, Guillermo D'Elía, Claudio J. Bidau, Enrique P. Lessa: Species groups and the evolutionary diversification of tuco-tucos, genus Ctenomys (Rodentia: Ctenomyidae). Journal of Mammalogy 92 (3), June 9, 2011; Pp. 671-682. doi : 10.1644 / 10-MAMM-A-121.1
literature
- Tucuman Tuco-tuco. In: TRO Freitas: Family Ctenomyidae In: Don E. Wilson, TE Lacher, Jr., Russell A. Mittermeier (editor): Handbook of the Mammals of the World: Lagomorphs and Rodents 1. (HMW, Volume 6) Lynx Edicions, Barcelona 2016, p. 517. ISBN 978-84-941892-3-4 .
- Claudio J. Bidau Ctenomys tucumanus Thomas, 1900. In: Family Ctenomyidae Lesson, 1842. In: JL Patton, UFJ Pardiñas, G. D'Elía: Mammals of South America. The University of Chicago Press, 2015; Pp. 818-877. ISBN 978-0-226-16957-6 .