The American genus Penetrigonias Tanner & Martin, 1976 (Mammalia: Rhinocerotidae) as a stem group elasmothere and ancestor of Menoceras Troxell, 1921

@inproceedings{Heissig2012TheAG,
  title={The American genus Penetrigonias Tanner & Martin, 1976 (Mammalia: Rhinocerotidae) as a stem group elasmothere and ancestor of Menoceras Troxell, 1921},
  author={K. Heissig},
  year={2012}
}
A detailed character study of the early Oligocene skull of Penetrigonias dakotensis (Peterson, 1920) kept in the Bavarian State Collection of Paleontology and Geology at Munich, Germany, and comparisons of this specimen with geologically older species of the genus has resulted in the recognition of features characterizing this lineage of small-sized rhinoceroses of North America. Morphological trends recognizable in the upper cheek teeth of P. dakotensis are present also in the early… Expand
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