Octomylodon is an extinct genus of ground sloth of the family Mylodontidae, living during the Late Miocene (Huayquerian). Fossil remains of Octomylodon have been found uniquely in the Ituzaingó Formation, Argentina, South America from 9.0 to 6.8 mya, existing for approximately .[1]
Octomylodon was assigned to Mylodontidae by Carroll (1988).[2]