Pilar Comb rat

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Pilar Comb rat
Systematics
Subordination : Porcupine relatives (Hystricomorpha)
Partial order : Hystricognathi
without rank: Guinea Pig Relatives (Caviomorpha)
Family : Comb rats (Ctenomyidae)
Genre : Comb rats ( Ctenomys )
Type : Pilar Comb rat
Scientific name
Ctenomys pilarensis
Contreras , 1993

The pilar crested rat ( Ctenomys pilarensis ) is a type of crested rat . The species occurs in southeastern Paraguay , where it is only found in the area of ​​the city of Pilar in the Ñeembucú department .

features

The Pilar comb rat reaches a head-trunk length of 18.3 to 20.9 centimeters in the males and 16.9 to 17.7 centimeters in the females. It is a medium-sized species of the genus. The back color is gray-brown, further details on the appearance are not documented.

The karyotype consists of a double set of chromosomes of 2n = 48–50 chromosomes (FN = 50). The sperm are slightly asymmetrical.

distribution

The distribution area of ​​the Pilar crested rat is limited to the southeastern Paraguay , where it is only proven as endemic in the area of ​​the city of Pilar in the department of Ñeembucú between the Río Paraguay and the Río Paraná .

Way of life

As is the case with most species of comb rats, very little information is available about the way of life of the pilar crested rat. Like all comb rats, it lives largely underground in duct systems that it creates in sandy soils, especially in cassava fields. The animals eat vegetarian food from the available plants.

Systematics

The Pilar comb rat is classified as an independent species within the genus of the comb rats ( Ctenomys ), which consists of about 70 species. The first scientific description of the species comes from the Argentine zoologist Julio Rafael Contreras from 1993, who described it using individuals from Pilar in the Ñeembucú department.

Apart from the nominate form, no subspecies are distinguished within the species .

Status, threat and protection

The Pilar Combed Rat is listed as "endangered" by the International Union for Conservation of Nature and Natural Resources (IUCN). This is justified by the very small living space available, which is less than 500 km 2 . In addition, all known individuals come from one to four populations at the same location, where the quality of the habitat is declining due to the agricultural use for manioc cultivation. The animals are viewed as pests in the cassava fields and controlled, the number of adult individuals is correspondingly decreasing.

supporting documents

  1. ↑ a b c d e f g h Pilar 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. 533. ISBN 978-84-941892-3-4 .
  2. ↑ a b c Ctenomys pilarensis in the endangered Red List species the IUCN 2019. Posted by: CJ Bidau, 2016. Accessed June 3, 2020th
  3. ↑ a b Ctenomys pilarensis . In: Don E. Wilson , DeeAnn M. Reeder (Eds.): Mammal Species of the World. A taxonomic and geographic Reference. 2 volumes. 3. Edition. Johns Hopkins University Press, Baltimore MD 2005, ISBN 0-8018-8221-4 .

literature

  • Pilar 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. 533. ISBN 978-84-941892-3-4 .

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