Octodon pacificus Hutterer, 1994:28

Pacific degu, Mocha degu



Taxonomy & Nomenclature



Conservation Status

Last record: 1959 (Fisher & Blomberg, 2012)

Rediscovered in December 2015

IUCN RedList status: Critically Endangered



Mocha Island (=Isla Mocha), Arauca Province, Chile


Biology & Ecology










Original scientific description:

Hutterer, H. (1994). Island rodents: a new species of Octodon from Isla Mocha, Chile (Mammalia: Octodontidae). Zeitschrift für Säugetierkunde 59(1): 27-41.


Other references:

Cadenillas, Richard and D'Elía, Guillermo. (2021). The number of species of degus (genus Octodon) is currently underestimated: An appraisal of species limits and their phylogenetic relationships (Rodentia: Hystricomorpha: Octodontidae). Molecular Phylogenetics and Evolution 159: 107111. [Abstract]

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.

Honeycutt, R. L., Rowe, D. L. and Gallardo, M. H. (2003). Molecular systematics of the South American caviomorph rodents: relationships among species and genera in the family Octodontidae. Molecular Phylogenetics and Evolution 26: 476-489.

Huchon, D. and Douzery, E. 2001. From the Old World to the New World: A molecular chronicle of the phylogeny and biogeography of hystricognath rodents. Molecular Phylogenetics and Evolution, 20(2): 238-251.

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). Octodon pacificus. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.1. ( Downloaded on 09 September 2012.

Patton, James L. et al. (eds.). (2015). Mammals of South America, Volume 2: Rodents. Chicago: University of Chicago Press.

Pefaur, J. E. and Yañez, J. (1980). Ecología descriptiva de la Isla Mocha (Chile), en relación al poblamiento de los vertebrados. Bol. Museo Nacional Historia Natural, Chile 37: 103-112.

Saavedra, B., Quiroz, D. and Iriarte, J. (2003). Past and present small mammals of Isla Mocha (Chile). Mammalian Biology 68: 365-371.

Sanchez, M., Quiroz, D.and Becker, C. (1994). Un sitio Alfarero Tardío en Isla Mocha: P31-1. Boletín del Museo Regional de la Araucanía 5: 103-109.

Sporon, Anna and Mettler, Michael. (2002). Gesellige Degus. Stuttgart, Germany: Kosmos. 64 pp.

Vianna, Juliana A. et al. (2017). Record of an alleged extinct rodent: molecular analyses of the endemic Octodon pacificus from Chile. J Mammal. DOI: [Abstract]


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