The oldest record of the genus Lestodon Gervais, 1855 (Xenarthra, Tardigrada, Mylodontidae) (Montehermosan, Early Pliocene)

A skull of a subadult individual assigned to the mylodontine genus Lestodon Gervais, was found in Pliocene sediments of Farola Monte Hermoso (Buenos A ires Province), Argentina. This genus was known only from the Ensenadan and Lujanian ages (Pleistocene) to date. In the Buenos Aires Province, the sub family Myloclontinae has its oldest record in the Chapadmalalan age. The ne w record of Lestodon in the Montehermosan age extends the biochron of the g enus back to the Early Pliocene and represents the oldest record of the sub family Mylodontinae in the Buenos Aires Province.