“…It has been mentioned as a frequent element in the Gaiman Formation (early Miocene) at Bryn Gwyn (Tonni, 1980;Acosta Hospitaleche, 2007Acosta Hospitaleche et al, 2007;Acosta Hospitaleche et al, 2008), Chubut Province, Argentina; with some doubts in the middle Miocene-Pliocene Bahía Inglesa Formation in Chile (Acosta Hospitaleche et al, 2002;Acosta Hospitaleche and Canto, 2005;Soto Acuña et al, 2008); but certainly in the middle Miocene Chilcatay Formation in Perú (Acosta Hospitaleche and Stucchi, 2005). As shown above using morphogeometric tools, the specimens from Cerro Plataforma fall within the morphological range of P. bergi, the holotype of which comes from the Gaiman Formation.…”