THE EVOLUTIONARY STRATEGY OF THE EQUIDAE AND THE ORIGINS OF RUMEN AND CECAL DIGESTION

@article{Janis1976THEES,
  title={THE EVOLUTIONARY STRATEGY OF THE EQUIDAE AND THE ORIGINS OF RUMEN AND CECAL DIGESTION},
  author={Christine M. Janis},
  journal={Evolution},
  year={1976},
  volume={30}
}
  • C. Janis
  • Published 1 December 1976
  • Geography
  • Evolution
There are two main groups of ungulates or hoofed mammals living today, perissodactyls and artiodactyls. They are distinguished by a basic difference in foot morphology, which indicates that the two groups arose independently from a basal "proto-ungulate" stock (the order Condylarthra) in the early Tertiary. This difference involves the axis of symmetry of the foot. In perissodactyls it passes through the third metapodial, while in artiodactyls it passes between the third and fourth metapodials… 
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