Lago Blanco Comb rat

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Lago Blanco 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 : Lago Blanco Comb rat
Scientific name
Ctenomys fodax
Thomas , 1910

The Lago Blanco comb rat ( Ctenomys fodax ) is a type of comb rats . The species occurs in the Patagonian steppe in the south of Argentina in the province of Chubut .

features

The Lago Blanco comb rat reaches a head-torso length of about 26.0 centimeters with a tail length of 9.8 centimeters, there is no specific information for the weight. The rear foot length is 40 millimeters without the claw. The data come from the male holotype . This makes it one of the largest species of crested rats. The fur is soft. The color is usually cinnamon brown.

The skull is large and curved. The nasal bones are wide in the front area, which means that the muzzle region is also very wide. The tympanic membranes are wide and visible when viewed from above. The interparietals are longer than they are wide and are usually divided in the middle by a crest.

The karyotype consists of a double chromosome set of 2n = 28 chromosomes, the number of chromosome arms (FN, fundamentally number) is 38 or 42. The sperm are easily constructed asymmetrically.

distribution

The distribution area of ​​the Lago Blanco crested rat is in the south of Argentina in the province of Chubut . The species only occurs in the area around Lake Blanco and in the Río Senguer department .

Way of life

As with most species of comb rats, there is little information about the way of life of the Lago Blanco crested rat. Like all comb rats, it lives largely underground in duct systems that it creates in the sandy soils of the steppe. The animals eat vegetarian food from the available grasses and other plants. There is no information about reproduction.

Systematics

The Lago Blanco comb rat is classified as an independent species within the genus of the comb rats ( Ctenomys ), which consists of around 70 species. The first scientific description of the species comes from the zoologist Oldfield Thomas from 1910, who described it using individuals from the Valle del Lago Blanco in the mountainous regions of southern Chubut. The region was later limited to the Estancia Valle Huemuelles in the Río Senguer department . Based on molecular biological data, the species is assigned to the magellanicus species group around the magellanic comb rat ( Ctenomys magellanicus ) with other related species .

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

Status, threat and protection

The International Union for Conservation of Nature and Natural Resources (IUCN) does not assign the Lago Blanco comb rat to any hazard category, but rather lists it as "data deficient" due to a lack of data. The species is believed to be threatened, but very little information is available about its occurrence, condition and ecological needs.

supporting documents

  1. ↑ a b c d e f g h i j Lago Blanco 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. 525, ISBN 978-84-941892-3-4 .
  2. ↑ a b Ctenomys fodax . 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 .
  3. ↑ Ctenomys fodax in the endangered Red List species the IUCN 2020 Posted by: R. Ojeda, 2016. Accessed June 10, 2020th

literature

  • Lake Blanco 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. 525, ISBN 978-84-941892-3-4 .

Web links