Journal article
Iron-coated Komodo dragon teeth and the complex dental enamel of carnivorous reptiles
Nature Ecology & Evolution, Vol.8, pp.1711-1722
2024
PMCID: PMC11383799
PMID: 39048730
Abstract
Abstract Komodo dragons ( Varanus komodoensis ) are the largest extant predatory lizards and their ziphodont (serrated, curved and blade-shaped) teeth make them valuable analogues for studying tooth structure, function and comparing with extinct ziphodont taxa, such as theropod dinosaurs. Like other ziphodont reptiles, V. komodoensis teeth possess only a thin coating of enamel that is nevertheless able to cope with the demands of their puncture–pull feeding. Using advanced chemical and structural imaging, we reveal that V. komodoensis teeth possess a unique adaptation for maintaining their cutting edges: orange, iron-enriched coatings on their tooth serrations and tips. Comparisons with other extant varanids and crocodylians revealed that iron sequestration is probably widespread in reptile enamels but it is most striking in V. komodoensis and closely related ziphodont species, suggesting a crucial role in supporting serrated teeth. Unfortunately, fossilization confounds our ability to consistently detect similar iron coatings in fossil teeth, including those of ziphodont dinosaurs. However, unlike V. komodoensis , some theropods possessed specialized enamel along their tooth serrations, resembling the wavy enamel found in herbivorous hadrosaurid dinosaurs. These discoveries illustrate unexpected and disparate specializations for maintaining ziphodont teeth in predatory reptiles.
Details
- Title
- Iron-coated Komodo dragon teeth and the complex dental enamel of carnivorous reptiles
- Authors
- Aaron R. H. LeBlanc (Corresponding Author) - King's College LondonAlexander P. Morrell - King's College LondonSlobodan Sirovica - King's College LondonMaisoon Al-Jawad - University of LeedsDavid Labonte - Imperial College LondonDomenic C. D’Amore - Daemen CollegeChristofer Clemente - University of the Sunshine Coast, Queensland, School of Science, Technology and EngineeringSiyang Wang - Imperial College LondonFinn Giuliani - Imperial College LondonCatriona M. McGilvery - Imperial College LondonMichael Pittman - Chinese University of Hong KongThomas G. Kaye - Foundation for Scientific AdvancementColin Stevenson - Crocodiles of the WorldJoe Capon - Zoological Society of LondonBenjamin Tapley - Zoological Society of LondonSimon Spiro - Zoological Society of LondonOwen Addison - King's College London
- Publication details
- Nature Ecology & Evolution, Vol.8, pp.1711-1722
- Publisher
- Nature Publishing Group
- Date published
- 2024
- DOI
- 10.1038/s41559-024-02477-7
- ISSN
- 2397-334X
- PMID
- 39048730; PMC11383799
- Copyright note
- This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
- Data Availability
- All data, measurements and images are either in the manuscript or Supplementary Information. Raw synchrotron XRF and XRD datasets are made publicly available through the relevant synchrotron facility 3 years after each experiment under a CC-BY-4 license (see Supplementary Table 2 for experiment numbers).
- Organisation Unit
- School of Science, Technology and Engineering
- Language
- English
- Record Identifier
- 991050594002621
- Output Type
- Journal article
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