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Author: David B Weishampel
Publisher:
ISBN: 9783642695346
Category :
Languages : en
Pages : 124
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Book Description
Author: David B Weishampel
Publisher:
ISBN: 9783642695346
Category :
Languages : en
Pages : 124
Get Book Here
Book Description
Author: Cornelia Schulze
Publisher:
ISBN: 9780387131146
Category : Jaws
Languages : en
Pages : 104
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Book Description
Author: David B. Weishampel
Publisher: Springer Science & Business Media
ISBN: 3642695337
Category : Medical
Languages : en
Pages : 190
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Book Description
The Ornithopoda, one of five suborders within the Ornithischia, was originally proposed by Marsh in 1881 to include those bipedal dinosaurs possessing a predentary bone fitted over the rostral end of the mandibles. Ornithopods as recognized today can be further characterized by moderately long facial skele tons equipped with well-developed, often toothless premaxillae and moderate to large external nares. Maxillary and dentary dentitions vary but usually consist of at least one replacement series beneath the functional set; some have many rows of successional teeth. Tooth morphology suggests ornithopods were suc cessful herbivores but, as will be discussed, the precise way(s) in which ornitho pods chewed their food, hence lending important information about their tro phic position, has not been settled. Postcranially, ornithopods show specializa tion for bipedality in hindlimb construction and lack well-developed protective structures on their flanks, back, and tail. The Ornithopoda can itself be divided into five families: Fabrosauridae, He terodontosauridae, Hypsilophodontidae, 19uanodontidae, and Hadrosauridae (subdivided into the subfamilies Hadrosaurinae and Lambeosaurinae). Both fabrosaurids and heterodontosaurids, first known from the Late Triassic and Early Jurassic of Argentina and South Africa, were small animals differing in details of cranial, dental, and appendicular anatomy. Fabrosaurids are be lieved to represent the basal ornithopod stock (Galton 1972, 1978; Thulborn 1970a, 1972). During the Jurassic, ornithopods underwent major radiations that included the medium- to large-sized Hypsilophodontidae and the large bodied Iguanodontidae, both of which survived into the Cretaceous.
Author: Vincent Stanley Williams
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Understanding the feeding mechanisms and diet of ornithopod dinosaurs is fundamental to understanding their role in Late Cretaceous ecosystems. Current hypotheses of feeding behaviour are based on functional morphology, and testing these is problematic. Microscopic scratches, microwear, that form on teeth in vivo during feeding are known to record the relative movement of the tooth rows and to capture evidence of tooth-food interactions; however, their applicability to ornithischian dinosaurs has not been tested. The development of a fast non-abrasive and residue free method for the removal of resistant consolidant, along with a safe, rapid technique for replicating tooth surfaces was the first step towards assessing the suitability of quantitative tooth microwear analysis techniques for dinosaur teeth. An evaluation of appropriate statistical analysis methods followed, identifying suitably stringent tests for the analysis of variance in the multi-modal directional microwear data. Analysis of microwear orientation in Iguana iguana provided direct evidence for relative motion of the jaws. Microwear from the basal ornithischian Lesothosaurus diagnosticus revealed three distinct sets of scratches in different orientations that were comparable to those of I. iguana, confirming the isognathic, near-vertical, simple adduction predicted for this dinosaur. Results from the basal ornithopod Hypsilophodon foxii indicate a propalinal translation of the lower jaw during feeding and provide strong support for muscular cheeks, whilst those from the hadrosaurid Edmontosaurus indicate a near-vertical posterodorsal power stroke with a secondary propalinal action and support the presence of a pleurokinetic hinge. Analysis of a range of hadrosaurid taxa found that three differing mastication methods existed, potentially diet related. Furthermore, microwear suggests that here is no significant difference in the jaw mechanics between iguanodontians and hadrosaurids. The results demonstrate that microwear has great potential for unravelling the mystery of dinosaur feeding and identifying key stages in the evolution of jaw mechanics in ornithopods.
Author: Spencer G. Lucas
Publisher: Columbia University Press
ISBN: 0231541848
Category : Nature
Languages : en
Pages : 495
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Book Description
Geared towards a broad variety of students, Dinosaurs: The Textbook, sixth edition, is a concise and lucid presentation of the biological and geological concepts of dinosaur science. It clarifies the evolution, phylogeny, and classification of the various species while modeling the best approach for navigating new and existing research. Revised to reflect recent fossil discoveries and the current consensus on dinosaur science, this text moves through the major taxonomic groups—including theropods, sauropodomorphs, ornithopods, ceratopsians, pachycephalosaurs, stegosaurs, and ankylosaurs—and concludes with updated chapters on the behavior and extinction of the dinosaurs, their biological relationship to birds, and their representation (or misrepresentation) in art, literature, film, and other forms of popular culture. The sixth edition represents a major revision of the leading text for an introductory course on dinosaurs, including comprehensive updates based on the latest scientific discoveries, research, and literature. With an extensive art program revised by leading paleoartists that features cutting-edge illustrations, it is a complete reader-friendly pedagogical package with extensive end-of-chapter summary tools, review questions, a detailed glossary, a dinosaur dictionary, and a comprehensive index. Please visit our supplemental materials page (https://cup.columbia.edu/extras/supplement/dinosaurs-the-textbook-sixth-edition) to find study and teaching aides for both students and teachers using Dinosaurs: The Textbook, sixth edition in class.
Author: Ali Nabavizadeh
Publisher: JHU Press
ISBN: 1421413531
Category : Nature
Languages : en
Pages : 368
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Book Description
"This book provides a full exploration of the functional anatomy, paleoecology, and evolution of dinosaurs as viewed through the prism of feeding adaptations"--
Author: David B. Weishampel
Publisher: JHU Press
ISBN: 1421400278
Category : Nature
Languages : en
Pages : 328
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Book Description
At the end of the time of the dinosaurs, Transylvania was an island in what was to become southeastern Europe. The island's limited resources affected the size and life histories of its animals, resulting in a local dwarfism. For example, sauropods found on the island measured only six meters long, while their cousins elsewhere grew up to five times larger. Here, David B. Weishampel and Coralia-Maria Jianu present unique evolutionary interpretations of this phenomenon. The authors bring together the latest information on the fauna, flora, geology, and paleogeography of the region, casting these ancient reptiles in their phylogenetic, paleoecological, and evolutionary contexts. What the authors find is that Transylvanian dinosaurs experienced a range of unpredictable successes as they evolved. Woven throughout the detailed history and science of these diminutive dinosaurs is the fascinating story of the man who first discovered them, the mysterious twentieth-century paleontologist Franz Baron Nopcsa, whose name is synonymous with Transylvanian dinosaurs. Hailed by some as the father of paleobiology, it was Nopcsa alone who understood the importance of the dinosaur discoveries in Transylvania; their story cannot be told without recounting his. Transylvanian Dinosaurs strikes an engaging balance between biography and scientific treatise and is sure to capture the imagination of professional paleontologists and amateur dinophiles alike.
Author: Pascal Godefroit
Publisher: Indiana University Press
ISBN: 0253357217
Category : Nature
Languages : en
Pages : 649
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Book Description
The first complete dinosaur skeleton, that of an Iguanodon, was discovered in a coal mine in Bernissart in 1878. This book examines the Bernissart locality, the methodology of the excavation, and the genus Iguanodon.
Author: Jeff Thomason
Publisher: Cambridge University Press
ISBN: 9780521629218
Category : Science
Languages : en
Pages : 308
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Book Description
Looks at how fossil vertebrates moved, fed and reproduced.
Author: Kenneth Carpenter
Publisher: Indiana University Press
ISBN: 9780253339645
Category : Ankylosauridae
Languages : en
Pages : 554
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Book Description
Brings together the latest studies by an international group of dinosaur palaeontologists and provides descriptions of the original specimens of Hyaleosaurus and Stegosaurus
