Systematic Revision of the Sabellidae-Caobangiidae-Sabellongidae Complex (Annelida, Polychaeta). Bulletin of the AMNH PDF Download
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Languages : en
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Author: Kirk Fitzhugh
Publisher:
ISBN:
Category : Sabellida
Languages : en
Pages : 112
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"A cladistic analysis is conducted, encompassing a series of hierarchical levels within the Sabellidae-Caobangiidae-Sabellongidae complex. Generic relationships within this complex are examined using 36 genera and 43 characters. Outgroup comparisons with the Serpulidae s.s. and Spirorbidae are initially suggested. It is argued, however, that maintaining the Spirorbidae results in the Serpulidae being paraphyletic. Therefore, the Serpulidae s.l. (including spirorbids) are used as the outgroup. The possibility of using the Terebellomorpha (= Terebellida) as an outgroup is discussed. The more inclusive relationship between the orders Sabellida and Spionida is examined, leading to the conclusion that the Spionida is paraphyletic by way of recognizing the Sabellida. Sixteen most parsimonious cladograms are found, differing only slightly in the placement of some genera. Caobangia Giard and Sabellonga Hartman, representing the monotypic Caobangiidae and Sabellongidae, respectively, fall within the Sabellidae. In order to define the Sabellidae as monophyletic, Caobangia and Sabellonga must be placed in this family. Present sabellid subfamilies are either paraphyletic or polyphyletic, except for the monotypic Myxicolinae. Revised monophyletic subfamilies are suggested, comprising a more restricted Fabriciinae and expanded Sabellinae. Caobangia is placed into the former subfamily, while Sabellonga is moved to the latter. The Myxicolinae is not recognized, with Myxicola Koch in Renier being placed in the Sabellinae. Genera of the revised Sabellidae are reviewed in light of the characters used in the cladistic analysis. Several genera are poorly defined in terms of monophyly (e.g., Oriopsis Caullery and Mesnil, Jasmineira Langerhans), while six genera are not defined by synapomorphies: Chone Kröyer, Sabellastarte Kröyer, Perkinsiana Knight-Jones, Pseudopotamilla Bush, Eudistylia Bush, and Schizobranchia Bush. Setal transformation series are discussed, suggesting the presence of regulatory mechanisms localized within a particular body region or operating throughout the thorax and abdomen. Such mechanisms appear to allow for considerable structural lability, resulting in convergence of thoracic and abdominal setal forms from different plesiomorphic states. In some cases, it also appears as though abdominal setal forms may be controlled by segment age and location along the body. Changes in thoracic or abdominal setal forms in notopodia and neuropodia within a particular segment appear to be independent of one another"--P. 4.
Author: Kirk Fitzhugh
Publisher:
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Category :
Languages : en
Pages : 104
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Author: Elin Sigvaldadottir
Publisher: Springer Science & Business Media
ISBN: 9401706557
Category : Science
Languages : en
Pages : 387
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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: N. J. Maciolek
Publisher: Magnolia Press
ISBN: 186977373X
Category : Polychaeta
Languages : en
Pages : 581
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Author: Maria Capa
Publisher: MDPI
ISBN: 3036513906
Category : Science
Languages : en
Pages : 520
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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: Andrew L. Lissner
Publisher:
ISBN:
Category : Benthos
Languages : en
Pages : 412
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Author: Gregory Rouse
Publisher: Oxford University Press
ISBN: 9780198506089
Category : Science
Languages : en
Pages : 392
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Polychaetes are very common marine worms belonging to the Annelid family that are of interest to marine biologists and invertebrate zoologists. The book presents an understanding of the biology of this group with many illustrations.
Author: S. J. Hawkins
Publisher: CRC Press
ISBN: 0429845766
Category : Nature
Languages : en
Pages : 510
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Chapter 3 of this book is freely available as a downloadable Open Access PDF under a Creative Commons Attribution-Non Commercial-No Derivatives 3.0 license. https://s3-us-west-2.amazonaws.com/tandfbis/rt-files/docs/Open+Access+Chapters/9781138318625_oachapter3.pdf Oceanography and Marine Biology: An Annual Review remains one of the most cited sources in marine science and oceanography. The ever increasing interest in work in oceanography and marine biology and its relevance to global environmental issues, especially global climate change and its impacts, creates a demand for authoritative reviews summarizing the results of recent research. OMBAR has catered to this demand since its foundation more than 50 years ago. Following the favourable reception and complimentary reviews accorded to all the volumes, Volume 56 continues to regard the marine sciences—with all their various aspects—as a unity. Physical, chemical, and biological aspects of marine science are dealt with by experts actively engaged in these fields, and every chapter is peer-reviewed by other experts working actively in the specific areas of interest. The series is an essential reference text for researchers and students in all fields of marine science and related subjects, and it finds a place in libraries of universities, marine laboratories, research institutes and government departments.
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Category : Polychaeta
Languages : en
Pages : 434
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