Journal of Vertebrate Paleontology · 1984 · 29 citations · 4 references
Natural SciencesPaleontologyZoologyMammalogySystematic PaleontologyVertebrate PaleontologyDental AnatomyDental EvolutionMammal PaleontologyComparative Dental MorphologyCraniodental MorphologyCrown Morphology AnalysisDental Morphology EvolutionFossil Mammal SystematicsFossil Mammal TaxonomyGenus DescriptionMammalian Dentition
ABSTRACT Two mandibular fragments with teeth of Proargyrolagus blivianns, new genus and species, collected from the Branisella Zone of the early Oligocene (Deseadan) deposits at Salla, Bolivia, represent the earliest record and confirm the early specialization of the Argyrolagidae in South America. Unlike previously known Argyrolagidae (i.e., Plio-Pleistocene Argyrolagus and Microtragulus species), Proargyrolagus bolivianus has closed-rooted molars that are hypsodont, but were not evergrowing. Medial incisors and crown morphology of the molars are otherwise similar to those of the Plio-Pleistocene species.
4