^.^G
 EOLOGY LIBRARY
 ijrc^t^UO V
 Table of Contents
 Abstract
 1
 Introduction
 1
 Taxonomic Notes
 3
 Abbreviations
 3
 Tooth…
       
          
        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…
       
          
        Fig. 4.
 MACN A52-618, holotype of Archaeotypotherium propheticus, mandibular symphysis and portion of
 right horizontal ramus…
       
          
        Fig. 6.
 Specimens included in hypodigm of Ar-
 chaeotypotherium propheticus. A. MACN A52-630,
 right M2 and right m3. B. MACN…
       
          
        1.
 OS 00
 >0 lO
 00 p
 (N Tt <N
 SO SO vo
 — t^ro
 d d C)
 >> >s >s >. &…
       
          
        sential characters of the remaining upper cheek
 teeth have been given in the diagnosis of Ar-
 chaeotypotherium. Detachment of…
       
          
        present within the lateral depressions on the sym-
 physis, almost directly beneath the canine.
 The premolars are all heavily…
       
          
        Oldfieldthomasia
 Acropithecus
 Eohyrax
 Pseudhyrax
 Archaeotypotherium
 Protarchaeohyrax
 Archaeohyrax
 Hegetotherium
 Fig. 18…
       
          
        nation of the members (e.g., Archaeohegetotheria,
 Hegetoarchaeohyracoidea) could also be used.
 Some combination of these…
       
          
        mostly late Oligocene Deseadan SALMA. Filling
 a niche that presumably was similar to that of the
 hypsodont archaeohyracids,…