Dentitions, Tooth-Replacement and Jaw Articulation

  • Doris M. Kermack
  • Kenneth A. Kermack


Reptiles evolved into mammals under two separate pressures. The first was to improve hearing, so that they could become efficient nocturnal animals. This will be discussed in a later chapter (Chapter 6). The second pressure was dental: the unremitting drive to improve the efficiency of the teeth, initially for seizing and killing prey and later for cutting it up into conveniently sized pieces for swallowing. It will be noted that throughout we shall be talking about carnivores, as plant-eaters have such specialised dentitions that they have lost the capacity for further major advances. The future lay with the flesh-eater, and in particular with the insectivore with its relatively generalised dentition.


None None Thrust Bearing Cheek Tooth Spongy Bone Tooth Replacement 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Allin, E. F. (1975) ‘Evolution of the Mammalian Middle Ear’, J. Morph., Philadelphia, 147, 403–37CrossRefGoogle Scholar
  2. Bolk, L. (1922) ‘Odontological Essays. No. 5. On the Relations Between Reptilian and Mammalian Dentition, J. Anat. Lond., 57, 55–75Google Scholar
  3. Crompton, A. W. (1963) ‘The Evolution of the Mammalian Jaw’, Evolution, Lancaster, Pa., 17, 431–9CrossRefGoogle Scholar
  4. Crompton, A. W. (1972) ‘The Evolution of the Jaw Articulation in Cynodonts’ in K. A. Joysey and T. S. Kemp (eds.), Studies in Vertebrate Evolution, Oliver and Boyd, EdinburghGoogle Scholar
  5. Edmund, A. G. (1960) ‘Tooth Replacement Phenomena in the Lower Vertebrates’, Contributions No. 52, Life Sciences Division, Royal Ontario Museum, TorontoGoogle Scholar
  6. Fourie, S. (1963) ‘Tooth Replacement in the Gomphodont Cynodont Diademodon’, S. Afr. J. Sci., 59, 211–13Google Scholar
  7. Hopson, J. A. (1971) ‘Postcanine Replacement in the Gomphodont Cynodont Diadenrodon’ in D. M. Kermack and K. A. Kermack (eds.) Early Mammals, Zool. J. Linn. Soc., Lond., 50, Suppl. 1, 1–21Google Scholar
  8. Kermack, K. A. (1956) ‘Tooth Replacement in Mammal-like Reptiles of the Suborders Gorgonopsia and Therocephalia’, Phil. Trans. Roy. Soc. B, 240, 95–133Google Scholar
  9. Kermack, K. A., Mussett, F. and Rigney, H. W. (1973) ‘The Lower Jaw of Morganucodon’, Zool. J. Linn. Soc., Lond., 53, 87–175.Google Scholar
  10. Kermack, K. A. Mussett, F. and Rigney, H. W. (1981) The Skull of Morganucodon’, Zool. J. Linn. Soc., Lond., 71, 1–158Google Scholar
  11. Parrington, F. R. (1936) ‘On the Tooth Replacement in Theriodont Reptiles’, Phil. Trans. Roy. Soc. B, 226, 121–42Google Scholar
  12. Patterson, B. (1956) ‘Early Cretaceous Mammals’, Fieldiana, Geol., 13 (1), 1–100Google Scholar
  13. Pycraft, W. P. (1928) Random Gleanings from Nature’s Fields, Methuen, LondonGoogle Scholar
  14. Romer, A. S. (1969) ‘Cynodont Reptile with Incipient Mammalian Jaw Articulation’, Science, 166, 881–2CrossRefGoogle Scholar
  15. Romer, A. S. (1970) ‘The Chanares (Argentina) Triassic Reptile Fauna. VI. A Chiniquodont Cynodont with an Incipient Squamosal-dentary Jaw Articulation’, Breroria, 344, 1–18Google Scholar
  16. Romer, A. S. and Price, L. W. (1940) ‘Review of the Pelycosauria’, Geol. Soc. Amer. Sp. Papers no. 28Google Scholar
  17. Simpson, G. G. (1941) ‘The Function of Sabre-like Canines in Carnivorous Mammals’, Amer. Mus. Nov. no. 1130, 1–12Google Scholar
  18. Watson, D. M. S. (1951) Paleontology and Modern Biology, Yale University Press, New HavenGoogle Scholar

Copyright information

© Doris M. Kermack and Kenneth A. Kermack 1984

Authors and Affiliations

  • Doris M. Kermack
    • 1
  • Kenneth A. Kermack
    • 2
  1. 1.Department of Pure & Applied BiologyImperial CollegeLondonUK
  2. 2.Department of ZoologyUniversity College, LondonLondonUK

Personalised recommendations