AN EVALUATION OF THE DENTAL FEATURES USED TO DISTINGUISH TYPOTHERIOPSIS FROM PSEUDOTYPOTHERIUM (MESOTHERIIDAE, NOTOUNGULATA): REAPPRAISALS AND PROPOSALS REGARDING THEIR SYSTEMATIC VALUE

Authors

  • Matias Alberto Armella Instituto Superior de Correlación Geológica, INSUGEO-CONICET. Universidad Nacional de Tucumán. Miguel Lillo 205, T4000JFE San Miguel de Tucumán, Tucumán
  • Marcos Darío Ercoli 2Instituto de Ecorregiones Andinas (INECOA), Universidad Nacional de Jujuy, CONICET, IdGyM, Av. Bolivia 1661, Y4600GNE San Salvador de Jujuy, Jujuy

Keywords:

MESOTHERIINAE, SYSTEMATICS, TEETH, LATE NEOGENE, ARGENTINA

Abstract

The Mesotheriinae records in the late Neogene of Argentina are mostly grouped in two genera: Typotheriopsis and Pseudotypotherium. Both taxa were poorly diagnosed and/or based on juvenile specimens. Traditionally, the dental feature considered to distinguish them is the presence of a lingual groove in the last upper premolar. Other features were mostly dismissed or considered non-informative at a generic level. Based on this, we reanalyzed dental features in Typotheriopsis and Pseudotypotherium samples to evaluate their relevance in a taxonomic framework. This study brings new qualitative and quantitative tools to appraise diagnostic features present in fossil fragments and isolated dental mesotheriine pieces.

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Published

2018-11-20

Issue

Vol. 55 No. 5 (2018)

Section

Paleontological Notes

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How to Cite

AN EVALUATION OF THE DENTAL FEATURES USED TO DISTINGUISH TYPOTHERIOPSIS FROM PSEUDOTYPOTHERIUM (MESOTHERIIDAE, NOTOUNGULATA): REAPPRAISALS AND PROPOSALS REGARDING THEIR SYSTEMATIC VALUE. (2018). Ameghiniana, 55(5), 592-599. https://ameghiniana.org.ar/index.php/ameghiniana/article/view/3186