Impressions of the Attachment of the Soft Body to the Shell in Late Cretaceous Pachydiscid Ammonites from the Western Interior of the United States. American Museum Novitates PDF Download
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Languages : en
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Languages : en
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Author: Neil H. Landman
Publisher:
ISBN:
Category : Ammonoidea
Languages : en
Pages : 31
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Author: Christian Klug
Publisher: Springer
ISBN: 9401796300
Category : Science
Languages : en
Pages : 943
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This two-volume work is a testament to the abiding interest and human fascination with ammonites. We offer a new model to explain the morphogenesis of septa and the shell, we explore their habitats by the content of stable isotopes in their shells, we discuss the origin and later evolution of this important clade, and we deliver hypotheses on its demise. The Ammonoidea produced a great number of species that can be used in biostratigraphy and possibly, this is the macrofossil group, which has been used the most for that purpose. Nevertheless, many aspects of their anatomy, mode of life, development or paleobiogeographic distribution are still poorly known. Themes treated are biostratigraphy, paleoecology, paleoenvironment, paleobiogeography, evolution, phylogeny, and ontogeny. Advances such as an explosion of new information about ammonites, new technologies such as isotopic analysis, tomography and virtual paleontology in general, as well as continuous discovery of new fossil finds have given us the opportunity to present a comprehensive and timely "state of the art" compilation. Moreover, it also points the way for future studies to further enhance our understanding of this endlessly fascinating group of organisms.
Author: Winston Frank Ponder
Publisher: CRC Press
ISBN: 1351115235
Category : Nature
Languages : en
Pages : 1091
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This volume provides individual treatments of the major molluscan taxa. Each chapter provides an overview of the evolution, phylogeny and classification of a group of molluscs, as well as more specific and detailed coverage of their biology (reproduction, feeding and digestion, excretion, respiration etc.), their long fossil record and aspects of their natural history. The book is illustrated with hundreds of colour figures. In both volumes, concepts are summarised in colour-coded illustrations. Key selling features: Comprehensively reviews molluscan biology and evolutionary history Includes a description the anatomy and physiology of anatomical systems Up to date treatment with a comprehensive bibliography Reviews the phylogenetic history of the major molluscan lineages
Author: Adolf Seilacher
Publisher: CRC Press
ISBN: 1482221187
Category : Nature
Languages : en
Pages : 553
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Morphodynamics is defined as the unique interaction among environment, functional morphology, developmental constraints, phylogeny, and time—all of which shape the evolution of life. These fabricational patterns and similarities owe their regularity not to a detailed genetic program, but to extrinsic factors, which may be mechanical, chemical, or biological in nature. These self-organizing mechanisms are the focus of Morphodynamics. Illustrated by numerous examples from across the biological spectrum, this book embodies the foundation of noted paleontologist Adolf Seilacher’s thinking on the study of morphodynamics. It represents his unique approach of presenting paleontology from an ecological and constructional perspective, rather than a purely taxonomic one. The hallmark of Seilacher’s storied career has been a constructional and functional focus. He begins by discussing the basic principles—form, pattern formation, ecology and evolution, as well as the factors that override those processes. Next, he examines how morphodynamic principles are implemented in various invertebrates including single-celled protists, Ediacarans, sponges, coelenterates, shelled organisms, worms, arthropods, and echinoderms. The final chapter explores how morphogenetic principles may apply to clonal colonial organisms. Summarizing seventy years of research into the interactions of form, function, and evolution, the book is copiously illustrated with the author’s own distinctive drawings and an abundance of photos. It provides a framework for readers to pose their own questions and sharpen their interpretive skills on this fascinating topic.
Author: Paola Monegatti
Publisher:
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Category : Paleobiogeography
Languages : en
Pages : 308
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Author: Universität Hamburg. Geologisch-Paläontologisches Institut
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Category : Geology
Languages : en
Pages : 212
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Author: Geologische Bundesanstalt (Austria : 1922-1938)
Publisher:
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Category : Geology
Languages : en
Pages : 588
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Category : Animals
Languages : en
Pages : 930
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Author: Darrah Jorgensen
Publisher:
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Category : Electronic dissertations
Languages : en
Pages : 92
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