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Temporal range: Upper Pleistocene, 0.126–0.010 Ma
Catonyx cuvieri.jpg
Foot bones
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Xenarthra
Family: Mylodontidae
Subfamily: Scelidotheriinae
Genus: Catonyx
Species: C. cuvieri

Catonyx is an extinct genus of ground sloth of the family Mylodontidae, endemic to South America during the Late Pleistocene epochs.[1] It lived from 126,000—10,000 years ago, existing for approximately 0.116 million years.[2] The most recent date obtained is about 9600 B.P.[3][4]


Catonyx was named by Ameghino (1891). It was assigned to Scelidotheriinae by Gaudin (1995).[5]

Fossil distribution[edit]

Fossils have been uncovered in Brazil and Uruguay.


  1. ^ McDonald, H. G.; Perea, D. (2002). "The large scelidothere Catonyx tarijensis (Xenarthra, Mylodontidae) from the Pleistocene of Uruguay". Journal of Vertebrate Paleontology. 22 (3): 677. JSTOR 4524258. doi:10.1671/0272-4634(2002)022[0677:TLSCTX]2.0.CO;2. 
  2. ^ PaleoBiology Database: Catonyx, basic info
  3. ^ Turvey, Sam (2009). Holocene extinctions. Oxford University Press. pp. 20–33, 42–50, 352. ISBN 0-19-953509-4. 
  4. ^ Fiedal, Stuart (2009). "Sudden Deaths: The Chronology of Terminal Pleistocene Megafaunal Extinction". In Haynes, Gary. American Megafaunal Extinctions at the End of the Pleistocene. Springer. pp. 21–37. ISBN 978-1-4020-8792-9. doi:10.1007/978-1-4020-8793-6_2. 
  5. ^ Gaudin, T. J. (1995). "The ear region of edentates and the phylogeny of the Tardigrada (Mammalia, Xenarthra)". Journal of Vertebrate Paleontology. 15 (3): 672–705. JSTOR 4523658. doi:10.1080/02724634.1995.10011255.