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Seven Acantholaimus (Chromadoridae: Nematoda) species from one deep-sea sediment sample (Angola Basin, south-east Atlantic)

Published online by Cambridge University Press:  19 July 2012

Maria A. Miljutina ,
Dmitry M. Miljutin  and
Alexei V. Tchesunov
Maria A. Miljutina*
Affiliation:
Senckenberg Gesellschaft für Naturforschung, Senckenberg am Meer, Deutsches Zentrum für Marine Biodiversitätsforschung, Südstrand 44, 26382 Wilhelmshaven, Germany
Dmitry M. Miljutin
Affiliation:
Senckenberg Gesellschaft für Naturforschung, Senckenberg am Meer, Deutsches Zentrum für Marine Biodiversitätsforschung, Südstrand 44, 26382 Wilhelmshaven, Germany
Alexei V. Tchesunov
Affiliation:
Department of Invertebrate Zoology, Faculty of Biology, Moscow State University, 119991 Moscow, Russia
*
Correspondence should be addressed to: M.A. Miljutina, Senckenberg Gesellschaft für Naturforschung, Senckenberg am Meer, Deutsches Zentrum für Marine Biodiversitätsforschung, Südstrand 44, 26382 Wilhelmshaven, Germany email: mmiljutina@senckenberg.de
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Abstract

The genus Acantholaimus (Chromadoridae: Nematoda) is one of the most species-rich deep-sea nematode genera. The descriptions of two new species and supplemental descriptions of five known species from the Angola Basin (south-east Atlantic Ocean) and a depth of about 5500 m are given. Acantholaimus formosus sp. nov. is characterized by a spindle-shaped body with narrow elongated anterior end, the position of amphideal fovea on the apical tip of the body and by robust rugae and onchia. Acantholaimus skukinae sp. nov. is characterized by its cylindrical body shape; short outer labial, cephalic, cervical, and somatic setae; large amphideal fovea; the position of its amphideal fovea (situated relatively far from the head end); and relatively small onchia. Acantholaimus angustus was previously found in the Peru Basin (central-eastern Pacific) and the Clarion–Clipperton Nodule Province (Equatorial Pacific), about 13,000 km apart from the nearest previous location of finding. The type location of A. verscheldi is the Kenyan coast of the Indian Ocean. New specimens of this species were found about 8000 km apart from the type location. Acantholaimus akvavitus, A. iubilus and A. quintus were previously found in different parts of the Atlantic and the Pacific.

Keywords

biodiversitydistributionDIVA-I expeditionmarine nematodesnew speciestaxonomy
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 93 , Issue 4 , June 2013 , pp. 935 - 953
Copyright
Copyright © Marine Biological Association of the United Kingdom 2012 

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