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A new species of Polygordius (Polychaeta: Polygordiidae): from the inner continental shelf and in bays and harbours of the north-eastern United States

Published online by Cambridge University Press:  25 August 2006

Patricia A. Ramey ,
Dieter Fiege  and
Brian S. Leander
Patricia A. Ramey
Affiliation:
Institute of Marine and Coastal Sciences, Rutgers the State University of New Jersey, 71 Dudley Road, New Brunswick, NJ, 08901, USA
Dieter Fiege
Affiliation:
Forschungsinstitut Senckenberg, Sektion Marine Evertebraten II, Senckenberganlage 25, D-60325 Frankfurt/Main, Germany
Brian S. Leander
Affiliation:
Canadian Institute for Advanced Research, Program of Evolutionary Biology, Departments of Zoology and Botany, University of British Columbia, #3529-6270 University Boulevard, Vancouver, BC, V6T 1Z4, Canada
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Abstract

A new species of Polygordiidae, Polygordius jouinae sp. nov., along with its distribution, habitat, and reproduction is described. Polygordius jouinae sp. nov., the first North American Polygordius, is a dominant member of macrofaunal communities on the inner continental shelf, and in bays and harbours from Massachusetts to southern New Jersey. It is distinguished from most other Polygordius species by its non-inflated, heavily ciliated pygidium, absence of pygidial glands, and a conical (rather than rounded) prostomium. The 18S SSU rDNA from P. jouinae sp. nov. was sequenced and represents the first named Polygordius species with a DNA reference in GenBank. Spearman rank correlation of sediment grain size with density of P. jouinae sp. nov. at a New Jersey site showed that density was significantly (P<0.05; N=92) positively correlated with the proportion of medium to very coarse sand and negatively correlated with the fine sand fractions. Ecologically, P. jouinae sp. nov. is an important macrofaunal species given its widespread distribution and its fidelity for coarse sand habitats. Thus, its relative abundance may be useful as an indicator of changing sedimentary conditions.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 86 , Issue 5 , October 2006 , pp. 1025 - 1034
Copyright
2006 Marine Biological Association of the United Kingdom

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