Lagostomus crassus Thomas, 1910

Peruvian chinchilla (Vischaca)



Taxonomy & Nomenclature



Conservation Status


Last record: Subfossil; 1910 (Fisher & Blomberg, 2012; Lee et al., 2017)

IUCN RedList status: Extinct





Biology & Ecology




Only known from a single skull (Lessa et al. 2008). According to (Thomas, 1920:220) it was found "in the sand at Santa Ana by Mr. Kalinowski."






Original scientific description:

Thomas, Oldfield. (1910). XXXIII.—A collection of mammals from eastern Buenos Ayres, with descriptions of related new mammals from other localities. The Annals and Magazine of Natural History 5(27): 239-247. [Abstract]


Other references:

Fisher, Diana O. and Blomberg, Simon P. (2012). Inferring Extinction of Mammals from Sighting Records, Threats, and Biological Traits. Conservation Biology 26(1): 57-67.

Lee, T. E., Fisher, D. O., Blomberg, S. P. and Wintle, B. A. (2017). Extinct or still out there? Disentangling influences on extinction and rediscovery helps to clarify the fate of species on the edge. Global Change Biology 23(2): 621-634.

Lessa, E., Ojeda, R. and Bidau, C. (2008). Lagostomus crassus. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2. ( Downloaded on 26 December 2012.

Roach, N. (2016). Lagostomus crassus. The IUCN Red List of Threatened Species 2016: e.T136452A78324250. Accessed on 14 June 2022.

Spotorno, A. E. and Patton, J. L. (2015). Superfamily Chinchilloidea Bennett, 1833. In: Patton, J.L., Pardinas, U.F.J. and D'Elia, G. (eds), Mammals of South America Volume 2: Rodents, pp. 762-778. University of Chicago Press.

Thomas, Oldfield. (1920). Report on the mammalia collected by Mr. Edmund Heller during the Peruvian expedition of 1915 under the auspices of Yale University and the National Geographic Society. Proceedings U. S. National Museum 58: 217-249 + pl. 15.

Wilson, D. E. and Reeder, D. M. (2005). Mammal species of the world: a taxonomic and geographic reference. Third edition. Baltimore, MD: John Hopkins University Press.


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