A species of glyptodontid, Pseudoplohophorus absolutus n. sp. from the Upper Miocene of Uruguay is described. The holotype is represented by skull, mandible, great part of dorsal and cephalic carapace, caudal tube, humerus, hand bones, some vertebrae, and fragmentary pelvis and caudal ring plates. These materials were compared with very complete specimens of Neogene Sclerocalyptinae from Argentina and Uruguay. On the basis of these comparisons the partial synonymy between Pseudoplohophorus Castellanos and Stromaphoropsis Kraglievich, and the inclusion of genus Hoplophractus Cabrera within Eosclerocalyptyus C. Ameghino are proposed. A bio-zone characterized by Pseudoplohophorus, included in Camacho Formation deposits, is redefined. © Asociacio?n Paleontolo?gica Argentina.
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