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- Plains_viscacha_rat abstract "The plains viscacha rat or red vizcacha rat (Tympanoctomys barrerae) is a species of rodent in the family Octodontidae. The rodent is not a rat, but related to guinea pigs and chinchillas. It is monotypic within the genus Tympanoctomys. It is endemic to central western Argentina, where it has a fragmented range. Its natural habitat is desert scrubland, dunes and salt flats, where it eats halophyte plants. It is a solitary, nocturnal rodent that constructs large mounds with complex burrows.This species of rodent is unusual because it is tetraploid (4x = 2n = 102). Scientists think that this species may have arisen by hybridization and chromosome doubling from an ancestor (very possibly closely related to the mountain vizcacha rat, Octomys mimax, chromosome count 2x = 2n = 56). The doubling of its chromosome number was presumably by errors in mitosis or meiosis within the animal's reproductive organs.Careful analysis using chromosome paints shows that there are only two copies of each chromosome in T. barrerae not the four expected if it were truly a tetraploid. Its "new" diploid [2n] number is (almost) double and so its cells are roughly twice normal size by virtue of having twice as many chromosomes instead of twice as many sets of chromosomes. Its closest living relation is Octomys mimax, the Andean Viscacha-Rat of the same family, whose 2n = 56. It was therefore surmised that an Octomys-like ancestor originally produced tetraploid (i.e., 2n = 4x = 112) offspring that were, by virtue of their doubled chromosomes, reproductively isolated from their parents, after loss of some chromosomes.The golden vizcacha rat (Pipanacoctomys aureus) is also tetraploid and has 4x = 2n = 92 chromosomes. It is a sister-species to Tympanoctomys barrerae (4x = 102). In both cases the animals are by evolution developed from animals related to the diploid mountain vizcacha rat, Octomys mimax[3] (2x = 2n = 56) as a result of doubling and then loss of some chromosomes.New data point to a hybrid nature of the T. barrerae karyotype, suggesting a hybridization event in the origin of this species. Genome, 2012, 55(2): 105-117, 10.1139/g11-084The species is threatened by destruction of its fragmented and restricted habitat.".
- Plains_viscacha_rat binomialAuthority Barbara_Lawrence_Schevill.
- Plains_viscacha_rat class Mammal.
- Plains_viscacha_rat conservationStatus "NT".
- Plains_viscacha_rat conservationStatusSystem "iucn3.1".
- Plains_viscacha_rat family Octodontidae.
- Plains_viscacha_rat kingdom Animal.
- Plains_viscacha_rat order Rodent.
- Plains_viscacha_rat phylum Chordate.
- Plains_viscacha_rat thumbnail Tympanoctomys_barrerae.jpg?width=300.
- Plains_viscacha_rat wikiPageExternalLink op203.pdf.
- Plains_viscacha_rat wikiPageID "12531365".
- Plains_viscacha_rat wikiPageRevisionID "601564220".
- Plains_viscacha_rat binomial "Tympanoctomys barrerae".
- Plains_viscacha_rat classis "Mammalia".
- Plains_viscacha_rat familia Octodontidae.
- Plains_viscacha_rat genus "Tympanoctomys".
- Plains_viscacha_rat genusAuthority "Yepes, 1942".
- Plains_viscacha_rat hasPhotoCollection Plains_viscacha_rat.
- Plains_viscacha_rat name "Plains viscacha rat".
- Plains_viscacha_rat ordo "Rodentia".
- Plains_viscacha_rat phylum Chordate.
- Plains_viscacha_rat regnum "Animalia".
- Plains_viscacha_rat species "T. barrerae".
- Plains_viscacha_rat status "NT".
- Plains_viscacha_rat statusSystem "iucn3.1".
- Plains_viscacha_rat subject Category:Animals_described_in_1941.
- Plains_viscacha_rat subject Category:Endemic_fauna_of_Argentina.
- Plains_viscacha_rat subject Category:Mammals_of_Argentina.
- Plains_viscacha_rat subject Category:Octodontidae.
- Plains_viscacha_rat type Animal.
- Plains_viscacha_rat type Eukaryote.
- Plains_viscacha_rat type Mammal.
- Plains_viscacha_rat type Species.
- Plains_viscacha_rat type Organism.
- Plains_viscacha_rat comment "The plains viscacha rat or red vizcacha rat (Tympanoctomys barrerae) is a species of rodent in the family Octodontidae. The rodent is not a rat, but related to guinea pigs and chinchillas. It is monotypic within the genus Tympanoctomys. It is endemic to central western Argentina, where it has a fragmented range. Its natural habitat is desert scrubland, dunes and salt flats, where it eats halophyte plants.".
- Plains_viscacha_rat label "Plains viscacha rat".
- Plains_viscacha_rat label "Rote Viscacharatte".
- Plains_viscacha_rat label "Tympanoctomys barrerae".
- Plains_viscacha_rat label "Tympanoctomys barrerae".
- Plains_viscacha_rat label "Tympanoctomys barrerae".
- Plains_viscacha_rat label "Tympanoctomys barrerae".
- Plains_viscacha_rat label "Tympanoctomys".
- Plains_viscacha_rat label "Равнинная вискачевая крыса".
- Plains_viscacha_rat label "阿根廷平原鼠".
- Plains_viscacha_rat sameAs Rote_Viscacharatte.
- Plains_viscacha_rat sameAs Tympanoctomys_barrerae.
- Plains_viscacha_rat sameAs Tympanoctomys_barrerae.
- Plains_viscacha_rat sameAs Tympanoctomys_barrerae.
- Plains_viscacha_rat sameAs Tympanoctomys.
- Plains_viscacha_rat sameAs Tympanoctomys_barrerae.
- Plains_viscacha_rat sameAs Tympanoctomys_barrerae.
- Plains_viscacha_rat sameAs m.02wbsnm.
- Plains_viscacha_rat sameAs Q1567530.
- Plains_viscacha_rat sameAs Q1567530.
- Plains_viscacha_rat wasDerivedFrom Plains_viscacha_rat?oldid=601564220.
- Plains_viscacha_rat depiction Tympanoctomys_barrerae.jpg.
- Plains_viscacha_rat isPrimaryTopicOf Plains_viscacha_rat.
- Plains_viscacha_rat name "Plains viscacha rat".