A Review And Evaluation Of Homology Hypotheses In Echinoderm Paleobiology

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A Review and Evaluation of Homology Hypotheses in Echinoderm Paleobiology

Author : Colin D. Sumrall
Publisher : Cambridge University Press
ISBN 13 : 1009397168
Total Pages : 91 pages
Book Rating : 4.0/5 (93 download)

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Book Synopsis A Review and Evaluation of Homology Hypotheses in Echinoderm Paleobiology by : Colin D. Sumrall

Download or read book A Review and Evaluation of Homology Hypotheses in Echinoderm Paleobiology written by Colin D. Sumrall and published by Cambridge University Press. This book was released on 2023-04-13 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: The extraxial-axial theory (EAT) and universal elemental homology (UEH) are often portrayed as mutually exclusive hypotheses of homology within pentaradiate Echinodermata. EAT describes homology upon the echinoderm bauplan, interpreted through early post-metamorphic growth and growth zones, dividing it into axial regions generally associated with elements of the ambulacral system and extraxial regions that are not. UEH describes the detailed construction of the axial skeleton, dividing it into homologous plates and plate series based on symmetry, early growth, and function. These hypotheses are not in conflict; the latter is rooted in refinement of the former. Some interpretive differences arise because many of the morphologies described from eleutherozoan development are difficult to reconcile with Paleozoic forms. Conversely, many elements described for Paleozoic taxa by UEH, such as the peristomial border plates, are absent in eleutherozoans. This Element recommends these two hypotheses be used together to generate a better understanding of homology across Echinodermata.

The Ecology of Biotic Interactions in Echinoids

Author : Elizabeth Petsios
Publisher : Cambridge University Press
ISBN 13 : 1108899846
Total Pages : 88 pages
Book Rating : 4.1/5 (88 download)

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Book Synopsis The Ecology of Biotic Interactions in Echinoids by : Elizabeth Petsios

Download or read book The Ecology of Biotic Interactions in Echinoids written by Elizabeth Petsios and published by Cambridge University Press. This book was released on 2023-10-31 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Element reviews the ecologies of skeletal trace-producing interactions on echinoids in Modern ecosystems and the recognition of those biogenic traces in the fossil record. This title is also available as Open Access on Cambridge Core.

Testing Character Evolution Models in Phylogenetic Paleobiology

Author : April Wright
Publisher : Cambridge University Press
ISBN 13 : 100905872X
Total Pages : 80 pages
Book Rating : 4.0/5 (9 download)

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Book Synopsis Testing Character Evolution Models in Phylogenetic Paleobiology by : April Wright

Download or read book Testing Character Evolution Models in Phylogenetic Paleobiology written by April Wright and published by Cambridge University Press. This book was released on 2021-08-26 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: Macroevolutionary inference has historically been treated as a two-step process, involving the inference of a tree, and then inference of a macroevolutionary model using that tree. Newer models blend the two steps. These methods make more complete use of fossils than the previous generation of Bayesian phylogenetic models. They also involve many more parameters than prior models, including parameters about which empiricists may have little intuition. In this Element, we set forth a framework for fitting complex, hierarchical models. The authors ultimately fit and use a joint tree and diversification model to estimate a dated phylogeny of the Cincta (Echinodermata), a morphologically distinct group of Cambrian echinoderms that lack the fivefold radial symmetry characteristic of extant members of the phylum. Although the phylogeny of cinctans remains poorly supported in places, this Element shows how models of character change and diversification contribute to understanding patterns of phylogenetic relatedness and testing macroevolutionary hypotheses.

Echinoderm Larvae

Author : Herbert Clifton Chadwick
Publisher :
ISBN 13 :
Total Pages : 64 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Echinoderm Larvae by : Herbert Clifton Chadwick

Download or read book Echinoderm Larvae written by Herbert Clifton Chadwick and published by . This book was released on 1914 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Echinoderm Morphological Disparity: Methods, Patterns, and Possibilities

Author : Bradley Deline
Publisher : Cambridge University Press
ISBN 13 : 1108898041
Total Pages : 79 pages
Book Rating : 4.1/5 (88 download)

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Book Synopsis Echinoderm Morphological Disparity: Methods, Patterns, and Possibilities by : Bradley Deline

Download or read book Echinoderm Morphological Disparity: Methods, Patterns, and Possibilities written by Bradley Deline and published by Cambridge University Press. This book was released on 2021-02-11 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: The quantification of morphology through time is a vital tool in elucidating macroevolutionary patterns. Studies of disparity require intense effort but can provide insights beyond those gained using other methodologies. Over the last several decades, studies of disparity have proliferated, often using echinoderms as a model organism. Echinoderms have been used to study the methodology of disparity analyses and potential biases as well as documenting the morphological patterns observed in clades through time. Combining morphological studies with phylogenetic analyses or other disparate data sets allows for the testing of detailed and far-reaching evolutionary hypotheses.

Echinoderm Paleobiology

Author : William I. Ausich
Publisher : Indiana University Press
ISBN 13 : 0253351286
Total Pages : 474 pages
Book Rating : 4.2/5 (533 download)

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Book Synopsis Echinoderm Paleobiology by : William I. Ausich

Download or read book Echinoderm Paleobiology written by William I. Ausich and published by Indiana University Press. This book was released on 2008-07-18 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dominant faunal elements in shallow Paleozoic oceans, echinoderms are important to understanding these marine ecosystems. Echinoderms (which include such animals as sea stars, crinoids or sea lilies, sea urchins, sand dollars, and sea cucumbers) have left a rich and, for science, extremely useful fossil record. For various reasons, they provide the ideal source for answers to the questions that will help us develop a more complete understanding of global environmental and biodiversity changes. This volume highlights the modern study of fossil echinoderms and is organized into five parts: echinoderm paleoecology, functional morphology, and paleoecology; evolutionary paleoecology; morphology for refined phylogenetic studies; innovative applications of data encoded in echinoderms; and information on new crinoid data sets.

Echinoderms Through Time

Author : Bruno David
Publisher : CRC Press
ISBN 13 : 9789054105145
Total Pages : 970 pages
Book Rating : 4.1/5 (51 download)

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Book Synopsis Echinoderms Through Time by : Bruno David

Download or read book Echinoderms Through Time written by Bruno David and published by CRC Press. This book was released on 1994-06-01 with total page 970 pages. Available in PDF, EPUB and Kindle. Book excerpt: Echinoderms are now considered as a biological and geological model that underlies researches of primary importance. The extent of the contributions made by the International Echinoderm Conferences to various fields of research is attested by the scope covered by presentation at the international conferences. These proceedings contain the complete papers or abstracts of all the presentations and posters presented at the eighth International Echinoderm Conference, held in Dijon, France in September, 1994. Coverage includes: general; extinct classes; crinoids; asteroids; ophiuroids; holothuroids; and echinoids.

Chordate Origins and Evolution

Author : Noriyuki Satoh
Publisher : Academic Press
ISBN 13 : 0128030062
Total Pages : 222 pages
Book Rating : 4.1/5 (28 download)

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Book Synopsis Chordate Origins and Evolution by : Noriyuki Satoh

Download or read book Chordate Origins and Evolution written by Noriyuki Satoh and published by Academic Press. This book was released on 2016-07-14 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chordate Origins and Evolution: The Molecular Evolutionary Road to Vertebrates focuses on echinoderms (starfish, sea urchins, and others), hemichordates (acorn worms, etc.), cephalochordates (lancelets), urochordates or tunicates (ascidians, larvaceans and others), and vertebrates. In general, evolution of these groups is discussed independently, on a larger scale: ambulacrarians (echi+hemi) and chordates (cephlo+uro+vert). Until now, discussion of these topics has been somewhat fragmented, and this work provides a unified presentation of the essential information. In the more than 150 years since Charles Darwin proposed the concept of the origin of species by means of natural selection, which has profoundly affected all fields of biology and medicine, the evolution of animals (metazoans) has been studied, discussed, and debated extensively. Following many decades of classical comparative morphology and embryology, the 1980s marked a turning point in studies of animal evolution, when molecular biological approaches, including molecular phylogeny (MP), molecular evolutionary developmental biology (evo-devo), and comparative genomics (CG), began to be employed. There are at least five key events in metazoan evolution, which include the origins of 1) diploblastic animals, such as cnidarians; 2) triploblastic animals or bilaterians; 3) protostomes and deuterostomes; 4) chordates, among deuterostomes; and 5) vertebrates, among chordates. The last two have received special attention in relation to evolution of human beings. During the past two decades, great advances have been made in this field, especially in regard to molecular and developmental mechanisms involved in the evolution of chordates. For example, the interpretation of phylogenetic relationships among deuterostomes has drastically changed. In addition, we have now obtained a large quantity of MP, evo-devo, and CG information on the origin and evolution of chordates. Covers the most significant advances in this field to give readers an understanding of the interesting biological issues involved Provides a unified presentation of essential information regarding each phylum and an integrative understanding of molecular mechanisms involved in the origin and evolution of chordates Discusses the evolutionary scenario of chordates based on two major characteristic features of animals—namely modes of feeding (energy sources) and reproduction—as the two main forces driving animal evolution and benefiting dialogue for future studies of animal evolution

Phylogeny of the Echini

Author : Robert Tracy Jackson
Publisher :
ISBN 13 :
Total Pages : 334 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis Phylogeny of the Echini by : Robert Tracy Jackson

Download or read book Phylogeny of the Echini written by Robert Tracy Jackson and published by . This book was released on 1912 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Timetree of Life

Author : S. Blair Hedges
Publisher : OUP Oxford
ISBN 13 : 019160898X
Total Pages : 1237 pages
Book Rating : 4.1/5 (916 download)

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Book Synopsis The Timetree of Life by : S. Blair Hedges

Download or read book The Timetree of Life written by S. Blair Hedges and published by OUP Oxford. This book was released on 2009-04-23 with total page 1237 pages. Available in PDF, EPUB and Kindle. Book excerpt: The evolutionary history of life includes two primary components: phylogeny and timescale. Phylogeny refers to the branching order (relationships) of species or other taxa within a group and is crucial for understanding the inheritance of traits and for erecting classifications. However, a timescale is equally important because it provides a way to compare phylogeny directly with the evolution of other organisms and with planetary history such as geology, climate, extraterrestrialimpacts, and other features.The Timetree of Life is the first reference book to synthesize the wealth of information relating to the temporal component of phylogenetic trees. In the past, biologists have relied exclusively upon the fossil record to infer an evolutionary timescale. However, recent revolutionary advances in molecular biology have made it possible to not only estimate the relationships of many groups of organisms, but also to estimate their times of divergence with molecular clocks. The routineestimation and utilization of these so-called 'time-trees' could add exciting new dimensions to biology including enhanced opportunities to integrate large molecular data sets with fossil and biogeographic evidence (and thereby foster greater communication between molecular and traditional systematists). Theycould help estimate not only ancestral character states but also evolutionary rates in numerous categories of organismal phenotype; establish more reliable associations between causal historical processes and biological outcomes; develop a universally standardized scheme for biological classifications; and generally promote novel avenues of thought in many arenas of comparative evolutionary biology.This authoritative reference work brings together, for the first time, experts on all major groups of organisms to assemble a timetree of life. The result is a comprehensive resource on evolutionary history which will be an indispensable reference for scientists, educators, and students in the life sciences, earth sciences, and molecular biology. For each major group of organism, a representative is illustrated and a timetree of families and higher taxonomic groups is shown. Basic aspects ofthe evolutionary history of the group, the fossil record, and competing hypotheses of relationships are discussed. Details of the divergence times are presented for each node in the timetree, and primary literature references are included. The book is complemented by an online database(www.timetree.net) which allows researchers to both deposit and retrieve data.

Introduction to Paleobiology and the Fossil Record

Author : Michael J. Benton
Publisher : John Wiley & Sons
ISBN 13 : 1118685407
Total Pages : 1001 pages
Book Rating : 4.1/5 (186 download)

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Book Synopsis Introduction to Paleobiology and the Fossil Record by : Michael J. Benton

Download or read book Introduction to Paleobiology and the Fossil Record written by Michael J. Benton and published by John Wiley & Sons. This book was released on 2013-04-25 with total page 1001 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a comprehensive overview of the science of the history of life. Paleobiologists bring many analytical tools to bear in interpreting the fossil record and the book introduces the latest techniques, from multivariate investigations of biogeography and biostratigraphy to engineering analysis of dinosaur skulls, and from homeobox genes to cladistics. All the well-known fossil groups are included, including microfossils and invertebrates, but an important feature is the thorough coverage of plants, vertebrates and trace fossils together with discussion of the origins of both life and the metazoans. All key related subjects are introduced, such as systematics, ecology, evolution and development, stratigraphy and their roles in understanding where life came from and how it evolved and diversified. Unique features of the book are the numerous case studies from current research that lead students to the primary literature, analytical and mathematical explanations and tools, together with associated problem sets and practical schedules for instructors and students. “..any serious student of geology who does not pick this book off the shelf will be putting themselves at a huge disadvantage. The material may be complex, but the text is extremely accessible and well organized, and the book ought to be essential reading for palaeontologists at undergraduate, postgraduate and more advanced levels—both in Britain as well as in North America.” Falcon-Lang, H., Proc. Geol. Assoc. 2010 “...this is an excellent introduction to palaeontology in general. It is well structured, accessibly written and pleasantly informative .....I would recommend this as a standard reference text to all my students without hesitation.” David Norman Geol Mag 2010 Companion website This book includes a companion website at: www.blackwellpublishing.com/paleobiology The website includes: · An ongoing database of additional Practical’s prepared by the authors · Figures from the text for downloading · Useful links for each chapter · Updates from the authors

Marine Genetics

Author : Antonio M. Solé-Cava
Publisher : Springer Science & Business Media
ISBN 13 : 940172184X
Total Pages : 224 pages
Book Rating : 4.4/5 (17 download)

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Book Synopsis Marine Genetics by : Antonio M. Solé-Cava

Download or read book Marine Genetics written by Antonio M. Solé-Cava and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Our current knowledge of marine organisms and the factors affecting their ecology, distribution and evolution has been revolutionised by the use, in the last 20 years, of molecular population genetics tools. This book is the result of a meeting of world-leading experts, in Rio de Janeiro, where the state of the art of this field was reviewed. Topics covered include the molecular analysis of bio-invasions, the recent developments in marine biotechnology, the factors affecting levels of genetic variation and population structure in marine organisms and their application to conservation biology, fisheries and aquaculture. This is the first book dedicated to the genetic study of marine organisms. It will be very useful to biology students, scientists and anyone working or simply interested in areas such as marine biology, zoology, ecology, and population and molecular genetics.

The biology of Latimeria chalumnae and evolution of coelacanths

Author : J.A. Musick
Publisher : Springer Science & Business Media
ISBN 13 : 9401131945
Total Pages : 444 pages
Book Rating : 4.4/5 (11 download)

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Book Synopsis The biology of Latimeria chalumnae and evolution of coelacanths by : J.A. Musick

Download or read book The biology of Latimeria chalumnae and evolution of coelacanths written by J.A. Musick and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Constructional Morphology and Evolution

Author : Norbert Schmidt-Kittler
Publisher : Springer Science & Business Media
ISBN 13 : 3642761569
Total Pages : 401 pages
Book Rating : 4.6/5 (427 download)

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Book Synopsis Constructional Morphology and Evolution by : Norbert Schmidt-Kittler

Download or read book Constructional Morphology and Evolution written by Norbert Schmidt-Kittler and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 401 pages. Available in PDF, EPUB and Kindle. Book excerpt: Constructional morphology explains features of organisms from a constructional and functional point of view. By means of physical analysis it explains the operational aspects of organic structures - how they can perform the activities organisms are expected to fulfil in order to survive in their environment. Constructional morphology also explains options and constraints during the evolution determined by internal constructional needs, ontogenetic demands, inherited organizational preconditions and environmental clues.

The Artist and the Scientists

Author : Peter Trusler
Publisher : Cambridge University Press
ISBN 13 : 9780521162999
Total Pages : 322 pages
Book Rating : 4.1/5 (629 download)

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Book Synopsis The Artist and the Scientists by : Peter Trusler

Download or read book The Artist and the Scientists written by Peter Trusler and published by Cambridge University Press. This book was released on 2010-09-03 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Artist and the Scientists: Bringing Prehistory to Life presents the extraordinary lives and works of eminent paleontologists Patricia Vickers-Rich and Tom Rich, and Peter Trusler, one of the finest artists of scientific realism Australia has produced. Over more than thirty years, Patricia, Tom and Peter have travelled across Eastern Europe, Asia, the Americas, Africa, Australia and New Zealand in search of the remains of early life, including fish, dinosaurs, birds and mammals. Their successful expeditions, and the many publications and exquisite artworks that have ensued, are a testament to their scientific methodology, thirst for knowledge and eye for detail. The book follows the development of selected works of art covering the last 600 million years of the geological record. Told from the viewpoints of both scientist and artist, the reader is given a unique insight into the process of preserving and recording the evolution of prehistoric life.

Invertebrate Immunology

Author : B. Rinkevich
Publisher : Springer Science & Business Media
ISBN 13 : 3642797350
Total Pages : 261 pages
Book Rating : 4.6/5 (427 download)

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Book Synopsis Invertebrate Immunology by : B. Rinkevich

Download or read book Invertebrate Immunology written by B. Rinkevich and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 261 pages. Available in PDF, EPUB and Kindle. Book excerpt: The biological bases of invertebrate immune responses have interested scientists for decades, from the first relevant observation by E. Metchnikoff in 1882, who discovered phagocytosis while studying starfish larvae. Invertebrate immunology first began to be appre ciated as an important field in the late 1960s and 1970s. However, in the following years there was much controversy regarding the question: do invertebrates offer insight into the origin of the sophisticated immune responses of the vertebrates? There are several reasons why progress in research on invertebrate immune competence has been painfully slow. One of the main impediments to the progress, as compared to the fast development of knowledge in the vertebrate systems, was the fact that most of the studies concentrated on "whole organism" assays, mainly on grafting tissues between allogeneic partners. Only in the last few years have more and more aspects of invertebrate immunity been investigated on the cellular, biochemical and molecular levels. These studies led to discoveries of novel defense reactions, new pathways of effector mechanisms which are elicited after recognition of "nonself', and complex, sometimes highly polymorphic genetic elements that control invertebrate immune reactions. The importance of invertebrate immunity for understanding "immunology" as a whole, despite the conflicting models and hypotheses, is now much more recognized than before. Although most of the 20 phyla belonging to the inver tebrates have different modes of life, body organizations, habitats occupied, and biochemical patterns, they show striking aspects of exceptional precision for discriminating between self and nonself.

Coral Reefs: An Ecosystem in Transition

Author : Zvy Dubinsky
Publisher : Springer Science & Business Media
ISBN 13 : 9400701144
Total Pages : 541 pages
Book Rating : 4.4/5 (7 download)

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Book Synopsis Coral Reefs: An Ecosystem in Transition by : Zvy Dubinsky

Download or read book Coral Reefs: An Ecosystem in Transition written by Zvy Dubinsky and published by Springer Science & Business Media. This book was released on 2010-12-02 with total page 541 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers in one volume materials scattered in hundreds of research articles, in most cases focusing on specialized aspects of coral biology. In addition to the latest developments in coral evolution and physiology, it presents chapters devoted to novel frontiers in coral reef research. These include the molecular biology of corals and their symbiotic algae, remote sensing of reef systems, ecology of coral disease spread, effects of various scenarios of global climate change, ocean acidification effects of increasing CO2 levels on coral calcification, and damaged coral reef remediation. Beyond extensive coverage of the above aspects, key issues regarding the coral organism and the reef ecosystem such as calcification, reproduction, modeling, algae, reef invertebrates, competition and fish are re-evaluated in the light of new research and emerging insights. In all chapters novel theories as well as challenges to established paradigms are introduced, evaluated and discussed. This volume is indispensible for all those involved in coral reef management and conservation.