Cranial performance in the Komodo dragon (Varanus komodoensis) as revealed by high-resolution 3-D finite element analysis

Karen Moreno, Stephen Wroe, Philip Clausen, Colin McHenry, Domenic C D'Amore, Emily J Rayfield, Eleanor Cunningham

Research output: Contribution to journalArticleResearchpeer-review

65 Citations (Scopus)

Abstract

The Komodo dragon (Varanus komodoensis) displays a unique hold and pull-feeding technique. Its delicate space-frame skull morphology differs greatly from that apparent in most living large prey specialists and is suggestive of a high degree of optimization, wherein use of materials is minimized. Here, using high-resolution finite element modelling based on dissection and in vivo bite and pull data, we present results detailing the mechanical performance of the giant lizard s skull. Unlike most modern predators, V. komodoensis applies minimal input from the jaw muscles when butchering prey. Instead it uses series of actions controlled by postcranial muscles. A particularly interesting feature of the performance of the skull is that it reveals considerably lower overall stress when these additional extrinsic forces are added to those of the jaw adductors. This remarkable reduction in stress in response to additional force is facilitated by both internal and external bone anatomy. Functional correlations obtained from these analyses also provide a solid basis for the interpretation of feeding ecology in extinct species, including dinosaurs and sabre-tooth cats, with which V. komodoensis shares various cranial and dental characteristics.
Original languageEnglish
Pages (from-to)736 - 746
Number of pages11
JournalJournal of Anatomy
Volume212
Issue number6
DOIs
Publication statusPublished - 2008
Externally publishedYes

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