What is "antarctodon"

Antarctodon is an extinct genus of meridiungulatan mammal from the early Eocene (late Ypresian age). It is a basal astrapotherian which lived in what is now Seymour Island, Antarctic Peninsula. The holotype and only specimen MLP 08-XI-30-1, an isolated right p4 or m1, was found in the La Meseta Formation in Cucullaea I Allomember, West Antarctica. It was first named by Mariano Bond, Alejandro Kramarz, Ross D. E. MacPhee and Marcelo Reguero in 2011 and the type species is Antarctodon sobrali.