Morphological evolution and functional consequences of giantism in tyrannosauroid dinosaurs.

ABSTRACT: Tyrannosauroids are a clade of theropod dinosaur taxa that varied greatly in their body size distribution. We investigated the feeding performance of six tyrannosaur genera of variable body size and skull morphology. We used 3D finite element analysis to test whether skull shape becomes more or less resistant to feeding-induced forces. Cranial and mandibular models were scaled by adult Tyrannosaurus's surface area to analyze the influence of shape on skull function. It was found that Tyrannosaurus experienced higher absolute stresses compared to small-bodied relatives. When surface area values were equalized across genera to account for the effect of size and test efficiency of skull shape, smaller individuals experience notably greater stresses than larger relatives due to t

SUBMITTER: Rowe AJ 

PROVIDER: S-EPMC11387897 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature