FIGURE 14. 14.1 Bivariate plots of first and second upper molar dimensions for Chucal mesotheriines with the addition of the unidentified mesotheriine of Cerdas, UATF-V- 000840. Note the position of the new mesotheriine relative to E. chico. 14.2 Bivariate plots of the first, second, and third lower molar dimensions for the mesotheriines of Cerdas including the new mesotheriine UF 225707 and those adult dentitions that have associated deciduous teeth. Ap = Altitypotherium paucidens, Ac = Altitypotherium chucalensis, Ec = Eotypotherium chico, 'P.'m = 'Plesiotypotherium' minus, NS = new Mesotheriinae from Cerdas.