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Goldene Viscacharatte ( German )

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Die Goldene Viscacharatte (Pipanacoctomys aureus) ist eine in Südamerika lebende Nagetierart aus der Familie der Trugratten (Octodontidae). Sie wurde erst im Jahr 2000 wissenschaftlich beschrieben.

Es sind mit einer Kopfrumpflänge von rund 17 bis 18 Zentimetern mittelgroße Vertreter der Trugratten. Der Schwanz wird 13 bis 14,5 Zentimeter lang und endet in einer buschigen Quaste. Das Fell dieser Tiere ist an der Oberseite goldgelb gefärbt, die Unterseite ist weißlich.

Goldene Viscacharatten sind bislang nur vom Salar de Pipanaco, einer Salztonebene in der argentinischen Provinz Catamarca bekannt. Dort haben sie sich offensichtlich an einen sehr trockenen, mit Salzpflanzen bestandenen Lebensraum angepasst. Ansonsten ist über ihre Lebensweise nichts bekannt. Mit der Chalchaleros-Viscacharatte wurde vom gleichen Forscherteam im gleichen Jahr eine weitere bislang unbekannte Trugrattenart gefunden.

Die Goldene Viscacharatte ist wie die nahe verwandte Rote Viscacharatte tetraploid, das heißt, sie hat vier Chromosomensätze statt der bei allen übrigen Säugetieren vorhandenen zwei.[1] Der Karyotyp lautet 4n=92.

Literatur

  • Don E. Wilson, DeeAnn M. Reeder (Hrsg.): Mammal Species of the World. A taxonomic and geographic Reference. 2 Bände. 3. Auflage. Johns Hopkins University Press, Baltimore MD 2005, ISBN 0-8018-8221-4.
  • Michael A. Mares, Janet K. Braun, Rubén M. Barquez, M. Mónica Díaz: Two new genera and species of halophytic desert mammals from isolated salt flats in Argentina. In: Museum of Texas Tech University. Occasional Papers. Nr. 203, 2000, , S. 1–27, online (PDF; 7,96 MB).

Einzelnachweise

  1. Milton H. Gallardo, G. Kausel, A. Jiménez, C. Bacquet, C. González, J. Figueroa, N. Köhler, R. Ojeda: Whole-genome duplications in South American desert rodents (Octodontidae). In: Biological Journal of the Linnean Society. Bd. 82, Nr. 4, 2004, , S. 443–451, doi:10.1111/j.1095-8312.2004.00331.x.
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Goldene Viscacharatte: Brief Summary ( German )

provided by wikipedia DE

Die Goldene Viscacharatte (Pipanacoctomys aureus) ist eine in Südamerika lebende Nagetierart aus der Familie der Trugratten (Octodontidae). Sie wurde erst im Jahr 2000 wissenschaftlich beschrieben.

Es sind mit einer Kopfrumpflänge von rund 17 bis 18 Zentimetern mittelgroße Vertreter der Trugratten. Der Schwanz wird 13 bis 14,5 Zentimeter lang und endet in einer buschigen Quaste. Das Fell dieser Tiere ist an der Oberseite goldgelb gefärbt, die Unterseite ist weißlich.

Goldene Viscacharatten sind bislang nur vom Salar de Pipanaco, einer Salztonebene in der argentinischen Provinz Catamarca bekannt. Dort haben sie sich offensichtlich an einen sehr trockenen, mit Salzpflanzen bestandenen Lebensraum angepasst. Ansonsten ist über ihre Lebensweise nichts bekannt. Mit der Chalchaleros-Viscacharatte wurde vom gleichen Forscherteam im gleichen Jahr eine weitere bislang unbekannte Trugrattenart gefunden.

Die Goldene Viscacharatte ist wie die nahe verwandte Rote Viscacharatte tetraploid, das heißt, sie hat vier Chromosomensätze statt der bei allen übrigen Säugetieren vorhandenen zwei. Der Karyotyp lautet 4n=92.

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Golden viscacha rat

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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]

Description

The golden viscacha rat grows to a head-and-body length of about 170 millimetres (7 in) with a tufted tail of about 140 millimetres (6 in). The dorsal fur is golden-blond and the underparts are white.[5]

Distribution and habitat

The species is known from Catamarca Province of northwestern Argentina, where specimens are known only from the Salar de Pipanaco, a salt flat. This habitat consists largely of low, salt-loving shrubs, and the soil consists of sand with high levels of salt. It feeds on the halophytic plants growing there.[6] The genus is named after the locale, with “octo” being a reference to the figure-eight ridge on its cheek tooth.

Status

The golden viscacha rat is only found within a very restricted area totalling less than 100 square kilometres (39 sq mi) and it actually occupies only about one tenth of that area. It lives among the salt-loving plants that live between the salt pans and the desert. It is threatened by conversion of its very restricted habitat to agricultural use, for the growing of olives, and its population trend is downwards. The International Union for Conservation of Nature has rated its conservation status as "critically endangered".[1]

References

  1. ^ a b Roach, N. (2016). "Tympanoctomys aureus". IUCN Red List of Threatened Species. 2016: e.T136557A78324400. Retrieved 30 January 2020.
  2. ^ 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.
  3. ^ 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.
  4. ^ 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.
  5. ^ Mares, M. A.; Braun, J. K.; Barquez, R. M.; Díaz, M. M. (2000). "Two new genera and species of halophytic desert mammals from isolated salt flats in Argentina" (PDF). Occasional Papers, Museum of Texas Tech University. 203: 1–27. Archived from the original (PDF) on 2012-02-17. Retrieved 2011-03-29.
  6. ^ Mares, Michael A. (1 November 2003). "Desert dreams: seeking the secret mammals of the salt pans - Naturalist at Large" (PDF). Natural History: 29–34.
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Golden viscacha rat: Brief Summary

provided by wikipedia EN

The golden viscacha rat or golden vizcacha rat (Pipanacoctomys aureus) is the single species of the genus Pipanacoctomys of the rodent family Octodontidae. It has 92 chromosomes and has been regarded as tetraploid (4x = 2n). 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), (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.

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Pipanacoctomys aureus ( Spanish; Castilian )

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La vizcacha dorada (Pipanacoctomys aureus) es una especie de roedor histricomorfo de la familia Octodontidae, la única del género Pipanacoctomys. Es endémico de Argentina, en la provincia de Catamarca, donde solo se han visto especímenes en el Salar de Pipanaco. El género recibe su nombre del Salar de Pipanaco, y octo por la forma en figura octogonal de su dentadura.[2]

Referencias

  1. Lessa, E., Ojeda, R. & Bidau, C. (2013). «Pipanacoctomys aureus». Lista Roja de especies amenazadas de la UICN 2015.3 (en inglés). ISSN 2307-8235. Consultado el 20 de septiembre de 2015.
  2. Wilson, Don E.; Reeder, DeeAnn M., eds. (2005). «Pipanacoctomys aureus». Mammal Species of the World (en inglés) (3ª edición). Baltimore: Johns Hopkins University Press, 2 vols. (2142 pp.). ISBN 978-0-8018-8221-0.
  • Gallardo, M. H. et al. 2004. Whole-genome duplications in South American desert rodents (Octodontidae). Biological Journal of the Linnean Society, 82: 443-451.
  • Mares, Braun, Barquez, and Díaz. 2000. Two new genera and species of halophytic desert mammals from isolated salt flats in Argentina. Occasional Papers, Museum of Texas Tech University, 203: 1-27.

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Pipanacoctomys aureus: Brief Summary ( Spanish; Castilian )

provided by wikipedia ES

La vizcacha dorada (Pipanacoctomys aureus) es una especie de roedor histricomorfo de la familia Octodontidae, la única del género Pipanacoctomys. Es endémico de Argentina, en la provincia de Catamarca, donde solo se han visto especímenes en el Salar de Pipanaco. El género recibe su nombre del Salar de Pipanaco, y octo por la forma en figura octogonal de su dentadura.​

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Pipanacoctomys aureus ( French )

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Pipanacoctomys aureus est une espèce de rongeur de la famille des Octodontidae, la seule du genre Pipanacoctomys. On la rencontre dans la province de Catamarca, dans le Nord-Ouest argentin, ou des spécimens ont été observés uniquement dans le salar de Pipanaco. Le genre a reçu son nom de ce salar, et octo en raison de la forme octogonale de sa denture. Tant le genre que l'espèce ont été décrits très récemment.[1]

Il a la particularité d'être tétraploïde, possédant (2n = 4x = 92) chromosomes.[2]

Références

  1. Mammal Species of the World (version 3, 2005), consulté le 21 décembre 2020
  2. (en) M.H. Gallardo, « Whole-genome duplications in South American desert rodents », Biological Journal of the Linnean Society, vol. 82, no 4,‎ août 2004, p. 443-451 (lire en ligne)

Sources

  • Gallardo, M. H. et al. 2004. Whole-genome duplications in South American desert rodents (Octodontidae). Biological Journal of the Linnean Society, 82: 443-451.
  • M. A. Mares, J. K. Braun, R. M. Barquez, and M. M. Díaz. 2000. Two new genera and species of halophytic desert mammals from isolated salt flats in Argentina. Occasional Papers, Museum of Texas Tech University, 203: 1-27.

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Pipanacoctomys aureus: Brief Summary ( French )

provided by wikipedia FR

Pipanacoctomys aureus est une espèce de rongeur de la famille des Octodontidae, la seule du genre Pipanacoctomys. On la rencontre dans la province de Catamarca, dans le Nord-Ouest argentin, ou des spécimens ont été observés uniquement dans le salar de Pipanaco. Le genre a reçu son nom de ce salar, et octo en raison de la forme octogonale de sa denture. Tant le genre que l'espèce ont été décrits très récemment.

Il a la particularité d'être tétraploïde, possédant (2n = 4x = 92) chromosomes.

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Pipanacoctomys aureus ( Portuguese )

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Pipanacoctomys aureus é um gênero de roedor da família Octodontidae. É a única espécie do gênero Pipanacoctomys. Endêmica da Argentina, onde é conhecida apenas da localização-tipo: Salar de Pipanaco na província de Catamarca.

Referências

  • WOODS, C. A.; KILPATRICK, C. W. Infraorder Hystricognathi. In: WILSON, D. E.; REEDER, D. M. (Eds.). Mammal Species of the World: A Taxonomic and Geographic Reference. 3. ed. Baltimore: Johns Hopkins University Press, 2005. v. 2, p. 1538-1600.
  • LESSA, E.; OJEDA, R.; BIDAU, C. 2008. Pipanacoctomys aureus. In: IUCN 2008. 2008 IUCN Red List of Threatened Species. . Acessado em 15 de novembro de 2008.
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Pipanacoctomys aureus: Brief Summary ( Portuguese )

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Pipanacoctomys aureus é um gênero de roedor da família Octodontidae. É a única espécie do gênero Pipanacoctomys. Endêmica da Argentina, onde é conhecida apenas da localização-tipo: Salar de Pipanaco na província de Catamarca.

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황금비스카차쥐 ( Korean )

provided by wikipedia 한국어 위키백과

황금비스카차쥐(Pipanacoctomys aureus)는 데구과에 속하는 설치류의 일종이다.[2] 황금비스카차쥐속(Pipanacoctomys)의 유일종이다. 황금비스카차는 4배체 동물로 4x=2n=92 염색체를 갖고 있다.[3]

특징

황금비스카차는 머리부터 몸까지 몸길이가 약 170mm까지 자라며, 꼬리는 술 타래 모양으로 길이가 약 40mm이다. 등 쪽 털은 황금빛 금발이고, 하체는 흰색을 띤다.[4]

분포 및 서식지

아르헨티나 북서부의 카타마르카주에 알려져 있으며, 표본은 솔라 데 피파나코 염전에서만 발견되었다. 서식지는 대부분 저지대 호염성 관목 지대로 이루어져 있고, 토양은 고농도 염분을 가진 모래로 구성되어 있다. 먹이는 서식지에서 자라는 염생 식물이다.[5] 황금비스카차속의 학명은 8자 모양의 어금니 때문에 붙여진 "옥토"(octo)라는 이름에서 유래했다.

보전 상태

황금비스카차는 100km2 이하의 아주 제한적인 지역, 실제로 서식지 지역의 약 1/10에서만 서식하고 있다. 염전과 사막 사이의 호염성 식물 속에서 생활한다. 아주 제한된 서식지가 올리브를 키우기 위한 농경지로 전환되고 있으며, 개체수가 줄어들고 있다. 국제 자연 보전 연맹(IUCN)이 보전 상태를 "멸종위급종"으로 분류하고 있다.[1]

각주

  1. “Pipanacoctomys aureus”. 《멸종 위기 종의 IUCN 적색 목록. 2008판》 (영어). 국제 자연 보전 연맹. 2008. 2009년 1월 5일에 확인함.
  2. Woods, C.A.; Kilpatrick, C.W. (2005). 〈Infraorder Hystricognathi〉 [호저하목]. Wilson, D.E.; Reeder, D.M. 《Mammal Species of the World: A Taxonomic and Geographic Reference》 (영어) 3판. 존스 홉킨스 대학교 출판사. 1572–1573쪽. ISBN 978-0-8018-8221-0. OCLC 62265494.
  3. Gallardo, M. H. et al. (2004). Whole-genome duplications in South American desert rodents (Octodontidae) Archived 2012년 4월 25일 - 웨이백 머신. Biological Journal of the Linnean Society, 82, 443-451.
  4. Mares, M. A.; Braun, J. K.; Barquez, R. M.; Díaz, M. M. (2000). “Two new genera and species of halophytic desert mammals from isolated salt flats in Argentina” (PDF). 《Occasional Papers, Museum of Texas Tech University》 203: 1–27. 2012년 2월 17일에 원본 문서 (PDF)에서 보존된 문서. 2017년 3월 9일에 확인함.
  5. Mares, Michael A. (2003년 11월 1일). “Desert dreams: seeking the secret mammals of the salt pans - Naturalist at Large” (PDF). 《Natural History》: 29–34.[깨진 링크(과거 내용 찾기)]
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황금비스카차쥐: Brief Summary ( Korean )

provided by wikipedia 한국어 위키백과

황금비스카차쥐(Pipanacoctomys aureus)는 데구과에 속하는 설치류의 일종이다. 황금비스카차쥐속(Pipanacoctomys)의 유일종이다. 황금비스카차는 4배체 동물로 4x=2n=92 염색체를 갖고 있다.

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