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      Nuevos registros de Tympanoctomys barrerae (Rodentia, Octodontidae) Translated title: New records of Tympanoctomys barrerae (Rodentia, Octodontidae)

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          Abstract

          La rata vizcacha colorada, Tympanoctomys barrerae, presenta un rango geográfico reducido y ocurre a modo de parches poblacionales aislados y asociados a salares. En esta nota reportamos nuevos registros de distribución para las provincias de San Juan, Neuquén y La Pampa, y ampliamos considerablemente la distribución septentrional (340 km) y meridional (279 km) de la especie. Este conjunto de datos, sumado al registro fósil recientemente descubierto, extiende notablemente la distribución pasada y reciente de este género.

          Translated abstract

          The red vizcacha rat, Tympanoctomys barrerae, shows a reduced geographic range and a patchy distribution of its populations associated to salt basins. We report new distributional records for San Juan, Neuquén and La Pampa provinces, with a significant extension of their septentrional (340 km) and meridional (279 km) distribution. These set of data, coupled with the fossil record recently discovered, expand the past and actual distribution for the genera considerably.

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          Most cited references12

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          Discovery of tetraploidy in a mammal.

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            Evolutionary convergence of the highly adapted desert rodent Tympanoctomys barrerae (Octodontidae)

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              The largest known chromosome number for a mammal, in a South American desert rodent.

              Tympanoctomys barrerae, a desert specialist member of the family Octodontidae, until now thought to be conservative, and ancestral to South American hystricognath rodents, presents the highest diploid chromosome number (2n = 102) known in a mammal. Unexpectedly, its karyotype was found to be composed mainly of metacentric to sub-metacentric chromosomes. Mechanisms by which such a karyotype may have been derived are discussed.
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                Author and article information

                Journal
                mznt
                Mastozoología neotropical
                Mastozool. neotrop.
                Sociedad Argentina para el Estudio de los Mamíferos (SAREM) (Mendoza, Mendoza, Argentina )
                0327-9383
                1666-0536
                December 2007
                : 14
                : 2
                : 260-270
                Affiliations
                [01] Mendoza orgnameCONICET orgdiv1CRICYT orgdiv2IADIZA Argentina
                [02] Valdivia orgnameUniversidad Austral Chile orgdiv1Instituto de Ecología y Evolución Chile
                Article
                S0327-93832007000200012 S0327-9383(07)01400200012
                7a4e25ca-48ea-472e-abd8-879fd2bd2bd7

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                : 14 July 2006
                : 18 May 2007
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 12, Pages: 11
                Product

                SciELO Argentina


                Octodontidae,Argentina,Tierras Áridas,Distribución,Distribution,Aridlands

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