| Golden viscacha rat | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | Rodentia |
| Family: | Octodontidae |
| Genus: | Pipanacoctomys Mares, Braun, Barquez, and Díaz, 2000 |
| Species: | P. aureus
|
| Binomial name | |
| Pipanacoctomys aureus Mares, Braun, Barquez, and Díaz, 2000
| |
The golden viscacha rat or golden vizcacha rat (Pipanacoctomys aureus) is the single species of the genus Pipanacoctomys of the rodent family Octodontidae.[2] It has 92 chromosomes and has been regarded as tetraploid (4x = 2n).[3] This octodontid and its sister-species, the plains viscacha rat (Tympanoctomys barrerae) (2n = 102), may have arisen from the diploid mountain viscacha rat (Octomys mimax),[3] (2x = 2n = 56) as a result of the doubling and subsequent loss of some chromosomes. However, some genetic studies have rejected any polyploidism in mammals as unlikely, and suggest that amplification and dispersion of repetitive sequences best explain the large genome size.[4]
- ^ Roach, N. (2016). "Tympanoctomys aureus". IUCN Red List of Threatened Species. 2016: e.T136557A78324400. Retrieved 30 January 2020.
- ^ Woods, C.A.; Kilpatrick, C.W. (2005). "Infraorder Hystricognathi". In Wilson, D.E.; Reeder, D.M (eds.). Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Johns Hopkins University Press. pp. 1572–1573. ISBN 978-0-8018-8221-0. OCLC 62265494.
- ^ a b Gallardo, M. H. et al. (2004). Whole-genome duplications in South American desert rodents (Octodontidae) Archived 2012-04-25 at the Wayback Machine. Biological Journal of the Linnean Society, 82, 443-451.
- ^ Svartman, Marta; Stone, Gary; Stanyon, Roscoe (2005). "Molecular cytogenetics discards polyploidy in mammals". Genomics. 85 (4): 425–30. doi:10.1016/j.ygeno.2004.12.004. PMID 15780745.