Reinterpretation of Reigitherium bunodontum as a Reigitheriidae Dryolestoid and the interrelationships of the South American dryolestoids

ROUGIER, GUILLERMO W.; NOVACEK, MICHAEL J.; ORTIZ JAUREGUIZAR, EDGARDO; POL, DIEGO; PUERTA, PABLO

Saint Paul

Jornada; Sixty-Third Annual Meetyng of the Society of Vertebrate Paleontology; 2003

Science Museum of Minjnesota

In this communication we describe new materials of Reigitheriidae from La Colonia Formation and of the Paleocene dryolestoid Peligrotherium tropicalis. We conclude that: I) The original attribution of Reigitherium to Dryolestoidea was correct; 2) Reigitherium and Peligrotherium are more similar to each other than they are to rnesungulatids and can be united under Reigitheriidae; 3) Mesungulatidae and Rcigitheriidae are likely sister-groups.