Fig. 1.
 MACN A52-617, holotype oi Archaeohyrax patagonicus, left side of skull, viewed as right (adapted from
 Ameghino, 1897…
       
          
        typotheres) were members of the endemic South
 American group Notoungulata. George Gaylord
 Simpson's views on the…
       
          
        (in the classical sense of that name) is now shown
 to be paraphyletic.
 From the perspective of phylogenetic taxonomy
 (de…
       
          
        nation of the members (e.g., Archaeohegetotheria,
 Hegetoarchaeohyracoidea) could also be used.
 Some combination of these…
       
          
        Reguero, M. a., D. a. Croft, J. J. Flynn, and A. R.
 Wyss. (2003). Small archaeohyracids (Typotheria,
 Notoungulata) from…