typotheres) were members of the endemic South
 American group Notoungulata. George Gaylord
 Simpson's views on the…
       
          
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        nation of the members (e.g., Archaeohegetotheria,
 Hegetoarchaeohyracoidea) could also be used.
 Some combination of these…
       
          
        South American Land Mammal Ages: Correlation to
 global geochronologies, pp. 317-333. In Berggren, W.
 A., D. V. Kent, M.-P.…