Phylogenetic Relationships Of The Earliest Anisostrophically Coiled Gastropods
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Phylogenetic Relationships Of The Earliest Anisostrophically Coiled Gastropods
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Author : Peter J. Wagner
language : en
Publisher:
Release Date : 2002
Phylogenetic Relationships Of The Earliest Anisostrophically Coiled Gastropods written by Peter J. Wagner and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Gastropoda, Fossil categories.
In order to explore the phylogenetic relationships among early gastropods, cladistic analyses were conducted of nearly 300 archaeogastropod species known from the latest Cambrian through the Silurian. The study includes an extended outgroup analysis of Cambrian molluscs. The resulting estimates of gastropod phylogeny differ not only from traditional ideas about early gastropod relationships, but also from most alternative notions. Outgroup analyses suggest that gastropods had ancestors among the Tergomya (= Monoplacophora of many workers) of the Middle or Late Cambrian. Putative gastropods from older strata (e.g., the Pelagiellida and early Onychochilidae) apparently are not closely related to gastropods. The hypothesized ancestor of gastropods possessed dextral-coiling, septation, a deep sinus, and a peripheral band. An anal slit is commonly described as a synapomorphy of gastropods that many clades subsequently lost; however, this study suggests that the slit is a rare, highly derived, and polyphyletic character among early Paleozoic species, and that the ancestors of most "advanced" clades (e.g., the Apogastropoda) never had slits.This study suggests that two major subclades evolved by the earliest Ordovician. The diagnoses and definitions of these two subclades best correspond to the traditional diagnoses and definitions of the Euomphalina and Murchisoniina. The Pleurotomarioidea is not a paraphyletic ancestral taxon as typically suggested, but instead it is a polyphyletic assemblage derived multiple times from "euomphalinae" and "murchisoniinae" species. The Bellerophontina is at least diphyletic, as the taxon includes both the ancestors of archaeogastropods and a clade of planispiral species that is secondarily derived from "archaeogastropods." Macluritoids sensu stricto represent a restricted subclade of the "euomphalinae"; other supposed macluritoids evolved among different euomphalinae subclades or are not gastropods. Early Paleozoic species previously classified as caenogastropods (i.e., the Loxonematoidea and Subulitoidea) represent separate murchisoniinae subclades, with some putative members of the Subulitoidea derived within the Loxonematoidea. Early Paleozoic species assigned to the Trochoidea also represent several subclades, with most of those clades having evolved from the euomphalinae.An extensive taxonomic revision is presented, which removes all early Paleozoic taxa from the Pleurotomariina and broadly expands the definitions of the Euomphalina and Murchisoniina.
Phylogenetic Relationships Of The Earliest Anisostrophically Coiled Gastropods
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Author : Peter J. Wagner (paleontologia)
language : en
Publisher:
Release Date : 2002
Phylogenetic Relationships Of The Earliest Anisostrophically Coiled Gastropods written by Peter J. Wagner (paleontologia) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.
Phylogenetic Relationships Of The Earliest Anisostrophically Coiled Gastropods Smithsonian Contributions To Paleobiology
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Author : Smithsonian Institution
language : en
Publisher:
Release Date : 2002*
Phylogenetic Relationships Of The Earliest Anisostrophically Coiled Gastropods Smithsonian Contributions To Paleobiology written by Smithsonian Institution and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002* with categories.
Phylogenetic Relationships Of The Earliest Anisostrophically Coiled Gastropods
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Author : Peter J. Wagner
language : en
Publisher:
Release Date : 2002
Phylogenetic Relationships Of The Earliest Anisostrophically Coiled Gastropods written by Peter J. Wagner and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Gastropoda, Fossil categories.
Phylogenic Relationships Of The Earliest Anisostrophically Coiled Gastropods
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Author : Peter J. Wagner
language : en
Publisher:
Release Date : 2002
Phylogenic Relationships Of The Earliest Anisostrophically Coiled Gastropods written by Peter J. Wagner and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Gastropoda, Fossil categories.
Biology And Evolution Of The Mollusca Volume 2
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Author : Winston Frank Ponder
language : en
Publisher: CRC Press
Release Date : 2020-02-14
Biology And Evolution Of The Mollusca Volume 2 written by Winston Frank Ponder and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-02-14 with Nature categories.
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
Phylogeny And Evolution Of The Mollusca
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Author : Winston Ponder
language : en
Publisher: Univ of California Press
Release Date : 2008-03-25
Phylogeny And Evolution Of The Mollusca written by Winston Ponder and has been published by Univ of California Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-03-25 with Nature categories.
"Ponder and Lindberg provides a breathtaking overview of the evolutionary history of the Mollusca, effectively melding information from anatomy, ecology, genomics, and paleobiology to explore the depths of molluscan phylogeny. Its outstanding success is due to thoughtful planning, focused complementary contributions from 36 expert authors, and careful editing. This volume is a must for malacologists."—Bruce Runnegar, Department of Earth and Space Sciences, University of California, Los Angeles "Our understanding of the phylogeny and evolutionary history of the mollusca has been revolutionized over the past two decades through new molecular data and analysis, and reinvestigation of morphological characters. In this volume Ponder, Lindberg, and their colleagues do a wonderful job of integrating this work to provide new perspectives on the relationships of the major molluscan clades, their evolutionary dynamics, and their history. Particularly timely is the coverage of molluscan evo-devo and genomics."—Douglas H. Erwin, Curator of Paleozoic Invertebrates, National Museum of Natural History
On The Origin Of Phyla
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Author : James W. Valentine
language : en
Publisher: University of Chicago Press
Release Date : 2004-06-18
On The Origin Of Phyla written by James W. Valentine and has been published by University of Chicago Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004-06-18 with Science categories.
Owing its inspiration and title to On the Origin of Species, James W. Valentine's ambitious book synthesizes and applies the vast treasury of theory and research collected in the century and a half since Darwin's time. By investigating the origins of life's diversity, Valentine unlocks the mystery of the origin of phyla. One of the twentieth century's most distinguished paleobiologists, Valentine here integrates data from molecular genetics, evolutionary developmental biology, embryology, comparative morphology, and paleontology into an analysis of interest to scholars from any of these fields. He begins by examining the sorts of evidence that can be gleaned from fossils, molecules, and morphology, then reviews and compares the basic morphology and development of animal phyla, emphasizing the important design elements found in the bodyplans of both living and extinct phyla. Finally, Valentine undertakes the monumental task of developing models to explain the origin and early diversification of animal phyla, as well as their later evolutionary patterns. Truly a magnum opus, On the Origin of Phyla will take its place as one of the classic scientific texts of the twentieth century, affecting the work of paleontologists, morphologists, and developmental, molecular, and evolutionary biologists for decades to come. "A magisterial compendium . . . . Valentine offers a judicious evaluation of an astonishing array of evidence."—Richard Fortey, New Scientist "Truly a magnum opus, On the Origin of Phyla has already taken its place as one of the classic scientific texts of the twentieth century, affecting the work of paleontologists, morphologists, and developmental, molecular, and evolutionary biologists for decades to come."—Ethology, Ecology & Evolution "Valentine is one of the Renaissance minds of our time. . . . Darwin wisely called his best-known work On the Origin of the Species; the origin of the phyla is an even stickier problem, and Valentine deserves credit for tackling it at such breadth . . . . A magnificient book."—Stefan Bengtson, Nature
Transformative Paleobotany
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Author : Michael Krings
language : en
Publisher: Academic Press
Release Date : 2018-07-14
Transformative Paleobotany written by Michael Krings and has been published by Academic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-07-14 with Science categories.
Transformative Paleobotany: Papers to Commemorate the Life and Legacy of Thomas N. Taylor features the broadest possible spectrum of topics analyzing the structure, function and evolution of fossil plants, microorganisms, and organismal interactions in fossil ecosystems (e.g., plant paleobiography, paleoecology, early evolution of land plants, fossil fungi and microbial interactions with plants, systematics and phylogeny of major plant and fungal lineages, biostratigraphy, evolution of organismal interactions, ultrastructure, Antarctic paleobotany). The book includes the latest research from top scientists who have made transformative contributions. Sections are richly illustrated, well concepted, and characterize and summarize the most up-to-date understanding of this respective and important field of study. Features electronic supplements, such as photographs, diagrams, tables, flowcharts and links to other websites Includes in-depth illustrations with diagrams, flowcharts and photographic plates (many in color for enhanced utility), tables and graphs
The Great Ordovician Biodiversification Event Insights From The Tafilalt Biota Morocco
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Author : A.W. Hunter
language : en
Publisher: Geological Society of London
Release Date : 2022
The Great Ordovician Biodiversification Event Insights From The Tafilalt Biota Morocco written by A.W. Hunter and has been published by Geological Society of London this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022 with Science categories.
Special Publication 485 About 40 million years after the Cambrian Explosion, the Great Ordovician Biodiversification Event (GOBE) represents a second and dramatic burst in marine biodiversity, with major changes in the structure of ecosystems and the progressive replacement of the distinctive Cambrian Evolutionary Fauna by the Paleozoic Evolutionary Fauna. However, the GOBE is not a single, worldwide, short-term event, but rather the complex sum of successive diversifications occurring in distinct taxonomic groups, trophic guilds and regions. This book focuses on the Late Ordovician Tafilalt Biota, Anti-Atlas Morocco, which provides a snapshot of the GOBE in high-latitude regions of the Southern Hemisphere. A series of contributions explore different aspects of the Tafilalt Biota, including its geological setting, the international fossil trade in this area and a series of detailed systematic contributions describing many new taxa of marine invertebrates. This volume represents a significant contribution to the understanding of the Tafilalt Biota and its significance to the GOBE.