The first articulated skeleton of a penguin from the late Eocene of Antarctica is described. MLP 96-I-6-13 comes from the upper Submeseta Allomember (La Meseta Formation) of Isla Marambio (locality DPV 10/84). The significance of this finding in the context of the <i>Anthropornis nordenskjoeldi</i> biozone is discussed. An osteologic description of the recovered elements and a brief discussion of its systematic determination are provided. MLP 96-I-6-13 is the first articulated skeleton with sure specific assignment to <i>Palaeeudyptes gunnari</i> (Wiman, 1905), a species previously known only through isolated tarsometatarsi and included in the groups of Wiman.Facultad de Ciencias Naturales y Museo