Pleurodont

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Revision as of 07:31, 15 October 2024 by imported>Ffcx (The previously used terms "labial" and "cheek" are incorrect. "Labial" only refers to the anterior teeth, whereas "cheek" (buccal) only refers to anterior teeth. This also means that "cheek" cannot be used as a simple term for "labial" because these two terms are used to describe different terms. A general term for the external surface of the teeth is "vestibular". I used "outer" as a simple word for vestibular.)
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File:Tooth shape changes within the jaw (heterodont - homodont).jpg
Various squamate jaws viewed from the inside, showing pleurodonty

Pleurodont is a form of tooth implantation common in reptiles of the order Squamata, as well as in at least one temnospondyl.[1] The vestibular (outer) side of pleurodont teeth are fused (ankylosed) to the inner surface of the jaw bones which host them. The lingual (tongue) side of pleurodont teeth are not attached to bone, and instead are typically held in place by connective ligaments. This contrasts with thecodont implantation, in which the teeth are set in sockets and surrounded by bone on all sides.[2][3][4]

References

  1. ↑ Damiani, Ross; Steyer, J. SéBastien (2005). "A giant brachyopoid temnospondyl from the Upper Triassic or Lower Jurassic of Lesotho". Bulletin de la Société Géologique de France. 176 (3): 243–248. doi:10.2113/176.3.243 – via ResearchGate.
  2. ↑ Plough, F. H. et al. (2002) Vertebrate Life, 6th Ed. Prentice Hall Inc., Upper Saddle River, NJ. ISBN 0-13-041248-1
  3. ↑ Smith, Hobart M. (1958). "Evolutionary Lines in Tooth Attachment and Replacement in Reptiles: Their Possible Significance in Mammalian Dentition". Transactions of the Kansas Academy of Science. 61 (2): 215–225. doi:10.2307/3626649. JSTOR 3626649.
  4. ↑ "THE TEETH OF VERTEBRATE ANIMALS". University of the Cumberlands. Retrieved 2016-08-16.

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