Osteology of Deinonychus antirrhopus, an Unusual Theropod from the Lower Cretaceous of Montana

Osteology of Deinonychus antirrhopus, an Unusual Theropod from the Lower Cretaceous of Montana PDF Author: John H. Ostrom
Publisher: Yale University Press
ISBN: 1933789395
Category : Science
Languages : en
Pages : 196

Book Description
John H. Ostrom's expeditions to the Bighorn Basin of Wyoming and Montana in the 1960s resulted in discoveries and research that would change long-held concepts in paleontology. This fiftieth-anniversary edition of his now well-known description of the type specimen of Deinonychus antirrhopus revisits the work that redefined theropod dinosaurs as the intelligent, agile, and gregarious ancestors of modern birds and led in the late twentieth century to a renaissance in the study of dinosaurs and the evolution of flight.

Stratigraphy and Paleontology of the Cloverly Formation (Lower Cretaceous) of the Bighorn Basin Area, Wyoming and Montana

Stratigraphy and Paleontology of the Cloverly Formation (Lower Cretaceous) of the Bighorn Basin Area, Wyoming and Montana PDF Author: John H. Ostrom
Publisher: Yale University Press
ISBN: 1933789425
Category : Science
Languages : en
Pages : 354

Book Description
The fiftieth anniversary edition of a landmark publication showcasing prehistoric North American landscapes and ecosystems, from a celebrated paleontologist at Yale University's Peabody Museum The fiftieth anniversary edition of John H. Ostrom's Stratigraphy and Paleontology of the Cloverly Formation revisits his groundbreaking work pinpointing the age of the continental sequence of the Bighorn Basin area in Wyoming and Montana. The Cloverly Formation is important for understanding the development of North American terrestrial landscapes and prehistoric ecosystems, and current investigations are reinterpreting the age of the Formation with new evidence and data. The reissue of Ostrom's original benchmark research offers contemporary relevance for researchers and students today.

Avian Ancestors

Avian Ancestors PDF Author: Federico Agnolin
Publisher: Springer Science & Business Media
ISBN: 9400756372
Category : Science
Languages : en
Pages : 100

Book Description
Although consensus exists among researchers that birds evolved from coelurosaurian theropods, paleontologists still debate the identification of the group of coelurosaurians that most closely approaches the common ancestor of birds. The last 20 years witnessed the discovery of a wide array of avian-like theropods that has considerably amplified the anatomical disparity among deinonychosaurians, some of which resemble Archaeopteryx more than Deinonychus. Among these newly discovered theropods that show remarkable bird-like characteristics are the four-winged theropods Microraptor and Anchiornis, and the unenlagiids Unenlagia, Buitreraptor, and Rahonavis. A bizarre group of minute-sized coelurosaurs, the Scansoriopterygidae, also exhibits some avian similarities that lead some authors to interpret them as more closely related to birds than other dinosaurs. With the aim to explore the phylogenetic relationships of these coelurosaurians and birds, we merged recently published integrative databases, resulting in significant changes in the topological distribution of taxa within Paraves. We present evidence that Dromaeosauridae, Microraptoria, Unenlagiidae, and Anchiornis + Xiaotingia form successive sister taxa of Aves, and that the Scansoriopterygidae are basal coelurosaurians not closely related to birds. The implications in the evolutionary sequence of anatomical characters leading to birds, including the origin of flight, are also considered in light of this new phylogenetic hypothesis.

Evolution of Animal Behavior

Evolution of Animal Behavior PDF Author: Matthew H. Nitecki
Publisher: Oxford University Press
ISBN: 0195364945
Category : Science
Languages : en
Pages : 193

Book Description
This volume highlights current research in the field of animal behavior, with an emphasis on evolutionary perspectives. The contributors represent paleontological, field, and experimental approaches. They focus on a series of studies that confront wide-ranging issues, including sexual selection, mate choice, differential parental investment, apparent altruism, cooperative behavior, and the relevance of phylogenetic constraints and historical information. The volume will be of special interest to evolutionary biologists, behavioral ecologists, and paleontologists.

Bonebeds

Bonebeds PDF Author: Raymond R. Rogers
Publisher: University of Chicago Press
ISBN: 0226723739
Category : Science
Languages : en
Pages : 512

Book Description
The vertebrate fossil record extends back more than 500 million years, and bonebeds—localized concentrations of the skeletal remains of vertebrate animals—help unlock the secrets of this long history. Often spectacularly preserved, bonebeds—both modern and ancient—can reveal more about life histories, ecological associations, and preservation patterns than any single skeleton or bone. For this reason, bonebeds are frequently studied by paleobiologists, geologists, and archeologists seeking to piece together the vertebrate record. Thirteen respected researchers combine their experiences in Bonebeds, providing readers with workable definitions, theoretical frameworks, and a compendium of modern techniques in bonebed data collection and analysis. By addressing the historical, theoretical, and practical aspects of bonebed research, this edited volume—the first of its kind—provides the background and methods that students and professionals need to explore and understand these fantastic records of ancient life and death.

The Complete Dinosaur

The Complete Dinosaur PDF Author: James Orville Farlow
Publisher: Indiana University Press
ISBN: 9780253213136
Category : Nature
Languages : en
Pages : 792

Book Description
A highly illustrated celebration of dinosaurs for general readers, presenting a thorough survey from the earliest discoveries to contemporary controversies over extinction. Chapters are written by experts in fields including functional morphology, paleobiology, and biogeography, with sections on the discovery of dinosaurs, the study of dinosaurs, groups of dinosaurs, their biology, and dinosaur evolution. Highlights include discussion of new information on the warm-blooded/cold-blooded debate, new insights into the possibility of isolating dinosaur DNA, and a special section on dinosaurs in the media. While touted as accessible, treatment is sophisticated and assumes an educated and highly motivated readership. Includes a glossary, and bandw and color photos, drawings, paintings, and diagrams. Annotation copyrighted by Book News, Inc., Portland, OR

Dinosaurs

Dinosaurs PDF Author: Spencer G. Lucas
Publisher: Columbia University Press
ISBN: 0231556276
Category : Science
Languages : en
Pages : 509

Book Description
Geared toward a broad variety of students, Dinosaurs: The Textbook offers a concise and lucid presentation of the core biological and geological concepts of dinosaur science. Revised throughout to reflect recent fossil discoveries and the current scientific consensus, this seventh edition details the evolution, phylogeny, and classification of various dinosaur species while modeling the best approach for navigating new and existing research. Spencer G. Lucas takes readers through the major taxonomic groups, including theropods, sauropodomorphs, ornithopods, ceratopsians, pachycephalosaurs, stegosaurs, and ankylosaurs. He also examines 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. This seventh edition of the leading text for introductory courses on dinosaurs incorporates comprehensive updates based on the latest research. Lucas highlights how dinosaur science is rapidly evolving, exploring how new discoveries, methods, and ideas are expanding the frontiers of knowledge. The book features cutting-edge and scientifically rigorous illustrations by leading paleoartists. It also includes extensive and reader-friendly end-of-chapter summary tools, review questions, a detailed glossary, a dinosaur dictionary, and a comprehensive index.

The Story of the Dinosaurs in 25 Discoveries

The Story of the Dinosaurs in 25 Discoveries PDF Author: Donald R. Prothero
Publisher: Columbia University Press
ISBN: 0231546467
Category : Science
Languages : en
Pages : 504

Book Description
Today, any kid can rattle off the names of dozens of dinosaurs. But it took centuries of scientific effort—and a lot of luck—to discover and establish the diversity of dinosaur species we now know. How did we learn that Triceratops had three horns? Why don’t many paleontologists consider Brontosaurus a valid species? What convinced scientists that modern birds are relatives of ancient Velociraptor? In The Story of the Dinosaurs in 25 Discoveries, Donald R. Prothero tells the fascinating stories behind the most important fossil finds and the intrepid researchers who unearthed them. In twenty-five vivid vignettes, he weaves together dramatic tales of dinosaur discoveries with what modern science now knows about the species to which they belong. Prothero takes us from eighteenth-century sightings of colossal bones taken for biblical giants through recent discoveries of enormous predators even larger than Tyrannosaurus. He recounts the escapades of the larger-than-life personalities who made modern paleontology, including scientific rivalries like the nineteenth-century “Bone Wars.” Prothero also details how to draw the boundaries between species and explores debates such as whether dinosaurs had feathers, explaining the findings that settled them or keep them going. Throughout, he offers a clear and rigorous look at what paleontologists consider sound interpretation of evidence. An essential read for any dinosaur lover, this book teaches us to see an ancient world ruled by giant majestic creatures anew.
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