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Author: John David George
Publisher: Brill Archive
ISBN: 9789004075801
Category : Amphinomida
Languages : en
Pages : 236
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Book Description
Author: John David George
Publisher: Brill Archive
ISBN: 9789004075801
Category : Amphinomida
Languages : en
Pages : 236
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Book Description
Author: George
Publisher: BRILL
ISBN: 900462757X
Category : Science
Languages : en
Pages : 229
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Book Description
Author: J. D. Fish
Publisher: Cambridge University Press
ISBN: 9780521468190
Category : Nature
Languages : en
Pages : 588
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Book Description
Students and naturalists are not only interested in which species live on the seashore but also about their biology. How does a particular species reproduce? What is its life cycle? A Student's Guide to the Seashore is a unique, concise, illustrated guide to both the biology and identification of over 600 common and widespread shore animals and plants. In this new edition, for the first time, simple keys are included to allow accurate identification, and each species is beautifully illustrated by the author's line drawings. Together with concise summaries of diagnostic features, and notes on biology, this is the first comprehensive guide to the seashore giving a fascinating insight into the diversity and complexity of life on the shore. An extensive glossary of scientific terms and complete bibliography ensure that this book will be the premier biological text and identification guide for many years to come.
Author: Maria Capa
Publisher: MDPI
ISBN: 3036513906
Category : Science
Languages : en
Pages : 520
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Book Description
In this Special Issue, we address the state of the art of the systematics of the main annelid groups and the improvements in the diversity they hold, with special emphasis on the latest discoveries in well-studied areas, expeditions to unsurveyed areas or environments, or the use of novel techniques that allow for the improvement of biodiversity knowledge. We are hoping that this Special Issue will provide a platform facilitating a review of current knowledge on the subject, identifying current research problems, as well as indicating directions and research trends for the future.
Author: Elin Sigvaldadottir
Publisher: Springer Science & Business Media
ISBN: 9401706557
Category : Science
Languages : en
Pages : 387
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Book Description
In July 2001 experts from all around the world met in Reykjavik, Iceland to discuss various issues of polychaete biology. In particular the latest developments in cladistic inference of polychaete phylogeny were presented. Some studies applied recent molecular techniques, revealing unknown genetic relationships between the different families of polychaetous annelids. This volume is of interest to specialists and students seeking an introduction to the latest developments in the field of systematics and ecology of polychaetous annelids. This book is one in a series presenting results from the International Polychaete conferences.
Author: Pamela L. Beesley
Publisher: CSIRO PUBLISHING
ISBN: 9780643065710
Category : Reference
Languages : en
Pages : 582
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Book Description
A comprehensive account of Polychaetes in Australia. Based on nearly 2400 references, the authors reveal the wealth of diversity in the largely unknown world of these worm groups, in terms of their morphology, behaviour, reproduction and significance in marine ecosystems.
Author: Mary E. Petersen
Publisher: BRILL
ISBN: 9004629742
Category : Science
Languages : en
Pages : 724
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Book Description
Contains 67 original papers by nearly 100 of the world’s leading specialists. Together with abstracts and literature references for 37 presentations not represented by papers, this volume provides complete coverage of the Conference and a comprehensive overview of modern research on the polychaete annelids, one of the most important groups of marine invertebrates and constituents of marine benthos. Taxonomic and subject indices of all papers and abstracts provide ready access to the contained information. Richly illustrated, this book is provided with numerous line drawings, and photomicrographs, electron micrographs. Over 60 taxa are newly described or reassigned, and detailed reviews, revisions or redescriptions are provided for five families, one subfamily and numerous genera and species, with many illustrations of new and redescribed taxa and a pictorial key to the maglonids of Thailand.
Author: Kelly Sendall
Publisher: PenSoft Publishers LTD
ISBN: 9546426792
Category : Science
Languages : en
Pages : 82
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Book Description
The peanut-shaped sternaspid polychaetes have been known since 1760 when Plancus named them as Mentula cucurbitacea marina. Sternaspids are common and abundant in soft bottoms. Some authors suggested that only one species should be recognized, whereas others regard a few species very widely distributed and variable depths. Delineating species was problematic; the ventro-caudal shield was disregarded or barely used for identifying species. In this contribution the ventral shield is evaluated and its diagnostic potential is confirmed. The revision of Sternaspis is based upon type or topotype materials. Sternaspid body, introvert hooks and shield show three distinct patterns: two genera have 7 abdominal segments and tapered introvert hooks, and one genus has 8 abdominal segments and spatulate introvert hooks. The ventro-caudal shield has 3 different patterns: stiff with ribs, and sometimes concentric lines, stiff with feebly-defined ribs but no concentric lines, and soft with firmly adhered sediment particles. Sternaspis is restricted to include species with 7 abdominal segments, falcate introvert hooks, and stiff shields, often exhibiting radial ribs, concentric lines or both. Two new genera incorporate the remaining species: Caulleryaspis has falcate introvert hooks, 7 abdominal segments, and soft shields with sediment particles firmly adhered on them. Petersenaspis has spatulate introvert hooks, 8 abdominal segments, and stiff shields with poorly-defined ribs but no concentric line. The geographic range of most species is smaller than previously indicated. Keys to genera and to all species are also included.
Author: Günter Purschke
Publisher: Walter de Gruyter GmbH & Co KG
ISBN: 3110381788
Category : Science
Languages : en
Pages : 1129
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Book Description
This book is the first in a series of 4 volumes in the Handbook of Zoology series about morphology, anatomy, reproduction, development, ecology, phylogeny and systematics of Annelida. This first volume covers members of the so-called basal radiation and the first part of Sedentaria. It is supplemented by chapters on the history of annelid research, their fossil record, and an introduction to the phylogeny of annelids and their position in the tree of life. In the latter chapter the history of their systematic is reviewed giving an almost complete picture of systematic-scientific progress especially in the past years which changed our view on annelid phylogeny dramatically. The most basal annelids, lately united as Palaeoannelida, represent two families of aberrant polychaetes formerly often suggested to be highly derived which now give us a fresh look on how the ancestral annelid may have looked like. These lack certain key characters such as nuchal organs and possess rather simple nervous systems which now likely represent primitive character states. In this basal radiation the first taxon of apparently unsegmented and achaetigerous animals is positioned, the Sipuncula. Most likely another group of platyhelminth-like and unsegmented and even chaeta-lees annelids, Lobatocerebridae falls into this basal radiation. The section of Sedentaria starts with Orbiniida, a taxon characterized by elongated, thread-like worms which do not have anterior appendages like palps and comprises several families representing members of the Meiofauna. These minute worms often inhabiting the interstitial spaces in marine sands are suggested to have evolved by progenesis. The second higher taxon is represented by Cirratuliformia comprising nine families of typical sedentary polychaetes each of which showing a remarkable variation of the annelid body plan. Members of this taxon usually exhibit many annelid characters but certain also lack the most typical prostomial appendages, the palps.
Author: Barrie G M Jamieson
Publisher: CRC Press
ISBN: 1482280159
Category : Science
Languages : en
Pages : 699
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Book Description
Annelida is a diverse group of animals, commonly referred to as segmented worms and currently comprising around 14000 described species. Found in most marine and freshwater areas, annelids have also successfully occupied many subterranean habitats. This volume documents annelid reproduction in the context of their phylogenetic relationships. It pre
