Comprehensive Revision Of A Worldwide Collection Of Freshwater Sponges Porifera Spongillidae Classic Reprint
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Comprehensive Revision Of A Worldwide Collection Of Freshwater Sponges Porifera Spongillidae Classic Reprint
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Author : J. T. Penney
language : en
Publisher: Forgotten Books
Release Date : 2018-02-18
Comprehensive Revision Of A Worldwide Collection Of Freshwater Sponges Porifera Spongillidae Classic Reprint written by J. T. Penney and has been published by Forgotten Books this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-02-18 with Science categories.
Excerpt from Comprehensive Revision of a Worldwide Collection of Freshwater Sponges (Porifera, Spongillidae) In spite of the fact that serious scientific efforts in the taxonomic study of freshwater sponges were begun in the mid-19th century, and that a great number of subsequent investigators have contributed a massive amount of additional descriptive information, the taxonomy of this group has remained in a most chaotic state. Following Bowerbank's (1863) initial revision of all species of Spongilla, Gray (1867) was first to establish useful criteria for their generic differen tiation and to erect six new genera in addition to Spongilla Lamarck. Unfortunately, this system was criticized and its validity questioned by Carter (1881a), who claimed that Gray established his new genera without having seen Bowerbank's material upon which they were erected. Although fully unjustified in doing so, Carter (1881a) alto gether ignored Gray's existing generic names and devised his own system for the inclusion of Bowerbank's species and subsequently collected material. Thus it happened that Gray's well-established genera fell into complete obscurity for many decades, and Carter's system became firmly established, without being seriously challenged by any subsequent taxonomist. From the turn of this century, several attempts were made to revise comprehensively the status of the ever increasing numbers of species. After the publication of the first bibliography of all freshwater sponges by Weltner it was chiefly Annandale (1906 - 1919) who began to build the foundations to an improved and modernized knowledge of spongillid taxonomy. Annandale reestablished some of Gray's generic names, at least at a subgeneric level, and added a number of well-defined new genera to the conglomerate systems of Gray and Carter. Additional revisions were subsequently undertaken by Gee (1926 Schroder (1926 and Arndt (1923 to name just the most important contributors. Generic revisions were attempted by De Laubenfels (1936) and Jewell However, in spite of the fact that all these investigations have certainly helped to overcome a number of taxonomic difficulties, they seemed to have little effect on the stability of taxonomic nomenclature. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Comprehensive Revision Of A Worldwide Collection Of Freshwater Sponges Porifera Spongillidae
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Author : J. T. Penney
language : en
Publisher:
Release Date : 1968
Comprehensive Revision Of A Worldwide Collection Of Freshwater Sponges Porifera Spongillidae written by J. T. Penney and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with Sponges categories.
Racek seems to have authored much of this work after the death of J. T. Penney and undertook a study and review of Penny's huge colleciton of material and unpublished data at the recommendation of B. Theodore Cole of the University of South Carolina. In view of the voluminous material available, Racek found it imperative to revise all true gemmule-producing species rather than elaborate Penny's outlined account of the Meyeninae and as a result of the study, demonstrated the fallacy of a subdivision of the family Spongillidae by using gemmosclere characteristics.
Comprehensive Revision Of A Worldwide Collection Of Freshwater Sponges Porifera Spongillidae
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Author : J. T. PENNEY
language : en
Publisher:
Release Date : 2018
Comprehensive Revision Of A Worldwide Collection Of Freshwater Sponges Porifera Spongillidae written by J. T. PENNEY and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.
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Author :
language : en
Publisher:
Release Date : 1969
written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1969 with Catalogs, Union categories.
A Contribution To The Physiology Of The Fresh Water Sponges Spongillidae
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Author : H. van Trigt
language : en
Publisher:
Release Date : 1914
A Contribution To The Physiology Of The Fresh Water Sponges Spongillidae written by H. van Trigt and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1914 with Sponges categories.
The Comparative Embryology Of Sponges
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Author : Alexander V. Ereskovsky
language : en
Publisher: Springer Science & Business Media
Release Date : 2010-03-27
The Comparative Embryology Of Sponges written by Alexander V. Ereskovsky and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-03-27 with Science categories.
One of the major questions in the evolution of animals is the transition from unicellular to multicellular organization, which resulted in the emergence of Metazoa through a hypothetical Urmetazoa. The Comparative Embryology of Sponges contains abundant original and literary data on comparative embryology and morphology of the Porifera (Sponges), a group of 'lower Metazoa'. On the basis of this material, original typization of the development of Sponges is given and the problems concerning origin and evolution of Porifera and their ontogenesis are discussed. A morphogenetic interpretation of the body plan development during embryogenesis, metamorphosis and asexual reproduction in Sponges is proposed. Special attention is given to the analysis of characteristic features of the ontogenesis in Porifera. The book pursues three primary goals: 1) generalization of all existing information on individual development of sponges, its classification and a statement according to taxonomical structure of Porifera; 2) revealing of heterogeneity of morphogenesis and peculiarities of ontogeneses in various clades of Porifera, and also their correlations with the organization, both adult sponges, and their larvae; 3) revealing homology of morphogeneses in both Porifera and Eumetazoa, testifying to the general evolutionary roots of multicellular animals, and peculiar features of sponges' morphogeneses and ontogenesis. This book will be of interest to embryologists, zoologists, morphologists and researchers in evolutionary biology.
Ecology And Classification Of North American Freshwater Invertebrates
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Author : James H. Thorp
language : en
Publisher: Academic Press
Release Date : 2010
Ecology And Classification Of North American Freshwater Invertebrates written by James H. Thorp and has been published by Academic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Nature categories.
"The third edition of Ecology and Classification of North American Freshwater Invertebrates continues the tradition of in-depth coverage of the biology, ecology, phylogeny, and identification of freshwater invertebrates from the USA and Canada. This text serves as an authoritative single source for a broad coverage of the anatomy, physiology, ecology, and phylogeny of all major groups of invertebrates in inland waters of North America, north of Mexico." --Book Jacket.
Freshwater Animal Diversity Assessment
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Author : E.V. Balian
language : en
Publisher: Springer Science & Business Media
Release Date : 2008-04-27
Freshwater Animal Diversity Assessment written by E.V. Balian and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-04-27 with Science categories.
This book offers a comprehensive study of species- and genus-level diversity and chorology of the global freshwater fauna to date. It gives a state of the art assessment of the diversity and distribution of Metazoa in the continental waters of the world.
Aquatic Biodiversity Ii
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Author : H. Segers
language : en
Publisher: Springer Science & Business Media
Release Date : 2006-01-20
Aquatic Biodiversity Ii written by H. Segers and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-01-20 with Science categories.
Freshwater Biodiversity is a much underestimated component of global biodiversity, both in its diversity and in its potential to act as models for fundamental research in evolutionary biology and ecosystem studies. Freshwater organisms also reflect quality of water bodies and can thus be used to monitor changes in ecosystem health. The present book comprises a unique collection of primary research papers spanning a wide range of topics in aquatic biodiversity studies, and including a first global assessment of specific diversity of freshwater animals. The book also presents a section on the interaction between scientists and science policy managers. A target opinion paper lists priorities in aquatic biodiversity research for the next decade and several reactions from distinguished scientists discuss the relevance of these items from different points of view: fundamental ecology, taxonomy and systematics, needs of developing countries, present-day biodiversity policy at European and at global scales. It is believed that such a platform for the interaction between science and science policy is an absolute necessity for the efficient use of research budgets in the future.
Sponges Porifera
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Author : Werner E. G. Müller
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Sponges Porifera written by Werner E. G. Müller and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
Sponges (phylum Porifera) are known to be very rich sources for bioactive compounds, mainly secondary metabolites. Main efforts are devoted to cell- and mariculture of sponges to assure a sustainable exploitation of bioactive compounds from biological starting material. These activities are flanked by improved technologies to cultivate bacteria and fungi which are associated with the sponges. It is the hope that by elucidating the strategies of interaction between microorganisms and their host (sponge), by modern cell and molecular biological methods, a more comprehensive cultivation of the symbiotic organisms will be possible. The next step in the transfer of knowledge to biotechnological applications is the isolation, characterization and structural determination of the bioactive compounds by sophisticated chemical approaches.