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Echiura

Overview page. Subjects: Ecology and Conservation.

A small phylum of coelomate (see coelom), marine, worm-like animals in which mature individuals are unsegmented. Echiurans were formerly included in the Annelida, to which they are closely...

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Echiura

Overview page. Subjects: Ecology and Conservation.

A small phylum of coelomate (see coelom), marine, worm-like animals in which mature individuals are unsegmented. Echiurans were formerly included in the Annelida, to which they are closely...

See overview in Oxford Index

Echiura

Michael Allaby.

in A Dictionary of Ecology

January 2010; p ublished online January 2010 .

Reference Entry. Subjects: Ecology and Conservation. 80 words.

A small phylum of coelomate (see coelom), marine, worm-like animals in which mature individuals are unsegmented. Echiurans were

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Echiura

Michael Allaby.

in A Dictionary of Ecology

P ublished online September 2015 .

Reference Entry. Subjects: Ecology and Conservation. 81 words.

A small phylum of coelomate (see coelom), marine, worm-like animals in which mature individuals are unsegmented. Echiurans were

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Echiura

Edited by Michael Allaby.

in A Dictionary of Zoology

January 2014; p ublished online May 2014 .

Reference Entry. Subjects: Zoology and Animal Sciences. 131 words.

A group of coelomate (see coelom), marine, worm-like animals in which mature individuals lack *metameric segmentation.

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Priapulids, Sipunculans, Echiurans, and Entoprocts

Peter J. Hayward and John S. Ryland.

in Handbook of the Marine Fauna of North-West Europe

February 2017; p ublished online April 2017 .

Chapter. Subjects: Aquatic Biology. 4996 words.

Of three groups characterized by unsegmented, worm-like bodies, Priapulida is a class within the phylum Cephalorhyncha, the sipunculans represent two classes within the phylum Sipuncula,...

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Phylum Annelida

Claus Nielsen.

in Animal Evolution

December 2011; p ublished online December 2013 .

Chapter. Subjects: Evolutionary Biology. 10350 words.

Annelida is a phylum consisting of more than 16,500 described, living species of aquatic or terrestrial animals that are ecologically and systematically important. Two questionable species...

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Sipuncula

Michael Allaby.

in A Dictionary of Ecology

January 2010; p ublished online January 2010 .

Reference Entry. Subjects: Ecology and Conservation. 85 words.

A phylum of coelomate (see coelom) worms that lack body segmentation. Like *Echiura, they are cylindrical

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Sipuncula

Michael Allaby.

in A Dictionary of Ecology

P ublished online September 2015 .

Reference Entry. Subjects: Ecology and Conservation. 91 words.

A phylum of coelomate (see coelom) worms that lack body segmentation. Like *Echiura, they are cylindrical

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Sipuncula

Overview page. Subjects: Zoology and Animal Sciences — Ecology and Conservation.

A phylum of coelomate (see coelom) worms that lack body segmentation. Like Echiura, they are cylindrical in shape, and the mouth is surrounded by small tentacles. They have a long, U-shaped...

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Metazoan Relationships on the Basis of 18S rRNA Sequences: A Few Years Later…<sup>1</sup>

BIRGITTA M. H. WINNEPENNINCKX, YVES VAN DE PEER and THIERRY BACKELJAU.

in Integrative and Comparative Biology

December 1998; p ublished online December 1998 .

Journal Article. Subjects: Biological Sciences. 0 words.

SYNOPSIS. The 18S rRNA database is continuously growing and new tree construction methods are being developed. The present study aims at assessing what effect the addition of recently...

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