Steinbach Comb rat
| Steinbach Comb rat | ||||||||||||
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| Scientific name | ||||||||||||
| Ctenomys steinbachi | ||||||||||||
| Thomas , 1907 |
The Steinbach comb rat ( Ctenomys steinbachi ) is a type of comb rats . The species was first scientifically described in 1907 by Oldfield Thomas from Bolivia . There is hardly any information about the way of life of the animals.
features
The Steinbach comb rat reaches a head-trunk length of on average 23 to 25 centimeters and a tail length of 8.6 centimeters. The rear foot length with the claw is about 45 millimeters. Males and females are roughly the same size. It is one of the largest species in the genus. The fur of the animals is smooth, thin and shiny, the back hairs reach lengths of one to three millimeters. It is evenly dark gray-brown to copper-colored over the head, the back and the sides of the body and thus differs from the rather light fur of other species. The ventral side is creamy white, the hair is slate gray in its basal two thirds. The front and rear legs are pale gray in color with thin darker lines. The tail is gray-white and thinly haired.
The karyotype consists of a chromosome set of 2n = 10 chromosomes (FN = 18), which means that the species has the smallest number of chromosomes within the genus and, together with species of the Akodon genus, one of the lowest chromosome numbers in rodents. The sperm are built symmetrically.
distribution
The two-colored crested rat lives in central Bolivia in the Santa Cruz department .
Way of life
The habitats of the two-tone crested rat are shaped by the Amazon rainforest of Bolivia. It lives in the sandy soils of the forests and, like all other crested rats, digs on the ground and in the ground. It feeds on tubers and roots in the ground. No information is available about their way of life.
A single pregnant female with an embryo was captured in August, and no information is available on reproduction either.
Systematics
The Steinbach comb rat is classified as an independent species in the genus of the comb rats ( Ctenomys ). This consists of about 70 species. The first scientific description of the species comes from the British zoologist Oldfield Thomas from 1907, who described it using an individual from central Bolivia near the city of Santa Cruz de la Sierra . Subsequent editors limited the find area to the region north of Buen Retiro . Thomas named the species after the animal and plant collector José Steinbach , who was mainly active in Argentina and Bolivia.
The species is currently assigned to the boliviensis group within the genus on the basis of molecular-biological characteristics ; there is probably a closer relationship to the Bolivian comb rat ( Ctenomys boliviensis ) and the Goodfellow comb rat ( Ctenomys goodfellowi ).
Apart from the nominate form, no further subspecies are distinguished within the species .
Status, threat and protection
The Steinbach Comb rat is listed as not endangered by the International Union for Conservation of Nature and Natural Resources (IUCN). It occurs comparatively frequently in its limited range and the population is likely to be stable and adaptable to changes in habitat. There are currently no known threats for this species to exist.
supporting documents
- ^ A b c d e Claudio J. Bidau Ctenomys fulvus Philippi, 1860. In: Family Ctenomyidae Lesson, 1842. In: JL Patton, UFJ Pardiñas, G. D'Elía: Mammals of South America. The University of Chicago Press, 2015; Pp. 870-871. ISBN 978-0-226-16957-6 .
- ↑ a b c d e f g h i Steinbach's 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. 514. ISBN 978-84-941892-3-4 .
- ^ "Steinbach" In: Bo Beolens, Michael Grayson, Michael Watkins: The Eponym Dictionary of Mammals. Johns Hopkins University Press, 2009; P. 392; ISBN 978-0-8018-9304-9 .
- ↑ 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
- ↑ a b Ctenomys steinbachi in the endangered Red List species the IUCN 2018 Posted by: N. Roach, L. Naylor, 2016. Retrieved on 25 May of 2019.
literature
- Steinbach's 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. 514. ISBN 978-84-941892-3-4 .
- Claudio J. Bidau Ctenomys fulvus Philippi, 1860. In: Family Ctenomyidae Lesson, 1842. In: JL Patton, UFJ Pardiñas, G. D'Elía: Mammals of South America. The University of Chicago Press, 2015; Pp. 870-871. ISBN 978-0-226-16957-6 .