Gyldenstolpia fronto chacoensis (Gyldenstolpe, 1932)

Chaco fossorial giant rat



Taxonomy & Nomenclature

Synonym/s: Scapteromys chacoensis Gyldenstolpe, 1932 (original combination); Kunsia fronto chacoensis (Gyldenstolpe, 1932)


Conservation Status


Last record: 1896 (Martin et al., 2023)

IUCN RedList status: Critically Endangered (Possibly Extinct)



Chaco region, Argentina


Biology & Ecology










Original scientific description:

Gyldenstolpe, N. (1932). A new Scapteromys from Chaco Austral, Argentine. Arkiv för Zoologi, 24B(1):1-2.


Other references:

Hadler, Patricia, Galliari, Carlos A. and Pardiñas, Ulyses F. J. (2024). Chancy History of a Supposedly Vanished South American Rodent, Lagostomus crassus, with Remarks on Recent Extinctions in Caviomorphs, pp. 81-97. In: Rasia, Luciano Luis, Barbeito, Claudio Gustavo and Acuña, Francisco. (eds.). Plains Vizcachas: Biology and Evolution of a Peculiar Neotropical Caviomorph Rodent. Cham, Switzerland: Springer.

Martin, Thomas E., Bennett, Gareth C., Fairbairn, Andrew J. and Mooers, A. Ø. (2023). ‘Lost’ taxa and their conservation implications. Animal Conservation 26(1): 14-24. [Appendix S2 (1617 taxa not seen >10 years); Appendix S3 (562 taxa not seen >50 years)]

Pardiñas, U.F.J., D’Elía, G. and Teta, P. 2008. Una introducción a los mayo-res sigmodontinos vivientes: revisión de Kunsia Hershkovitz, 1966 y des-cripción de un nuevo género (Rodentia: Cricetidae). Arquivos do MuseuNacional, Rio de Janeiro 66: 509-594.

Pardinas, U., D'Elia, G., Teta, P. & Patterson, B. 2018. Gyldenstolpia fronto. The IUCN Red List of Threatened Species 2018: e.T11062A22388720. Downloaded on 20 December 2020.

Patton, J.L., Pardiñas, U.F.J. and D'Elía, G. 2015. Mammals of South America: Volume 2, Rodents. The University of Chicago Press, Chicago.


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