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Morphology and function of the palatal dentition in Choristodera

Matsumoto, R; Evans, SE; (2016) Morphology and function of the palatal dentition in Choristodera. Journal of Anatomy , 228 (3) pp. 414-429. 10.1111/joa.12414. Green open access

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Abstract

Choristoderes are a group of extinct freshwater reptiles that were distributed throughout Laurasia from the Middle Jurassic to the Miocene. They are inferred to have had a lifestyle similar to that of extant gavialid crocodiles, but they differed from crocodiles in retaining an extensive palatal dentition. All choristoderes had teeth on the vomers, palatines and pterygoids, and teeth are rarely present on the parasphenoid. Palatal teeth are conical, as in the marginal dentition, and form longitudinal and transverse rows. Detailed examination of different genera shows that the orientation of the palatal tooth crowns changes with their position on the palate, supporting the view that they are involved in intra-oral food transportation, presumably in combination with a fleshy tongue. Moreover, observed variation in palatal tooth shape and the width of palatal tooth batteries may provide additional clues about diet. The European Simoedosaurus lemoinei has sharper palatal teeth than its North American counterpart, S. dakotensis, suggesting a preference for softer prey - a conclusion consistent with the more gracile teeth and narrower snout.

Type: Article
Title: Morphology and function of the palatal dentition in Choristodera
Open access status: An open access version is available from UCL Discovery
DOI: 10.1111/joa.12414
Publisher version: http://dx.doi.org/10.1111/joa.12414
Language: English
Additional information: © 2015 Anatomical Society. This is the peer reviewed version of the following article: Matsumoto, R; Evans, SE; (2015) Morphology and function of the palatal dentition in Choristodera. Journal of Anatomy, which has been published in final form at http://dx.doi.org/10.1111/joa.12414. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Keywords: Champsosaurus ;function;morphology;palatal dentition; Simoedosaurus ;subthecodont
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences > Cell and Developmental Biology
URI: https://discovery.ucl.ac.uk/id/eprint/1471979
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