Titlebook: Evolution of Jaw Mechanisms in Ornithopod Dinosaurs; David B. Weishampel Book 1984 The Editor(s) (if applicable) and The Author(s), under

Rct393

Dental Morphology,Digestion begins with the mechanical breakdown of food between maxillary and dentary teeth; thus, the occlusal surfaces of these teeth are maintained and modified by the operation of the masticatory system. This section describes features of ornithopod dentitions (including wear patterns) that form the basis for testing kinematic models.

IRATE

Acknowledgments,This work was undertaken at the University of Pennsylvania and forms part of a PhD dissertation presented to the Graduate Faculty of the University of Pennsylvania. It is with deep appreciation that I acknowledge Peter Dodson for the aid, encouragement, and direction with which he supervised the project presented here.

BROTH

WAIL

殺人

Ornithopod Jaw Mechanics,1978), and Krause (1982) on mammals. Similarly, the present study is based on fossils in order to understand the mechanics of jaw motion in the diverse Mesozoic herbivores known as ornithopods. Most commonly, particularly in work on mammals, vertebrate jaw mechanisms are modeled as class III levers.

車(chē)床

inspiration

比目魚(yú)

去世

Cacophonous

Comparative Arthrology,ent occurs between adjacent skeletal elements. Joints can be classified into two broad groups on the basis of structure, function, and growth (following Warwick and Williams 1980): fibrous or cartilaginous joints and synovial joints.