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Laonice species (Polychaeta, Spionidae) from the Whittard Canyon (NE Atlantic) with descriptions of two new species

Published online by Cambridge University Press:  10 August 2017

Andrey Sikorski ,
Laetitia M. Gunton  and
Lyudmila Pavlova
Andrey Sikorski*
Affiliation:
Akvaplan-niva AS, Fram Centre, 9296 Tromsø, Norway
Laetitia M. Gunton
Affiliation:
Ocean and Earth Science, National Oceanography Centre Southampton, University of Southampton, Waterfront Campus, European Way, Southampton SO14 3ZH, UK
Lyudmila Pavlova
Affiliation:
Russian Academy of Sciences, Kola Science Centre, Murmansk Marine Biological Institute, Vladimirskaya str. 17, Murmansk 183010, Russia
*
Correspondence should be addressed to: A. Sikorski, Akvaplan-niva AS, Fram Centre, 9296 Tromsø, Norway email: as@akvaplan.niva.no
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Abstract

Four species of Laonice (Annelida: Spionidae) were collected from the lower bathyal depths (3300–3700 m) in the Whittard Canyon, NE Atlantic. Two are herewith described as new species: Laonice whittardensis sp. nov. and Laonice natae sp. nov. The other two are Laonice blakei Sikorski & Jirkov, 1988 and Laonice magnacristata Maciolek, 2000. Laonice whittardensis has genital pouches appearing from chaetiger 3, prostomium free of peristomium and bidentate hooks. Laonice natae belongs to the subgenus Appelloefia nov. with prostomium distinct from the peristomium, more than two vertical rows of capillaries in several anterior chaetigers, genital pouches present on a limited number of segments or totally absent. However, the absence of pronounced anterior widening of the body together with anterior branchiae, which are remarkably (nearly twice) longer than the notopodial postchaetal lobes, the narrow lanceolate notopodial postchaetal lobes, the pronounced pointedness of all postchaetal lobes (both notopodial and neuropodial) in the anterior half of body at least, and absence of genital pouches and the size of the body all distinguish L. natae from other species belonging to this subgenus. An identification key to all nine known deep-water (>400 m depth) Laonice species in North Atlantic is given and four previously recognized sub-generic groups are formally named: Laonice, Sarsiana subgen. nov., Appelloefia subgen. nov., Norgensia subgen. nov.

Keywords

Laonice whittardensisLaonice nataetaxonomydeep-sea faunaNE AtlanticLaoniceSarsianaAppelloefiaNorgensia
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 97 , Special Issue 5: Proceedings of the 12th International Polychaete Conference Amgueddfa Cymru - National Museum Wales Cardiff, Wales, UK, 1-5 August 2016 , August 2017 , pp. 961 - 973
Copyright
Copyright © Marine Biological Association of the United Kingdom 2017 

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Footnotes

Zoobank identifier: LSID urn:lsid:zoobank.org:act:98CFBF90-746E-4564-841F-BD457F097816 for Laonice whittardensis

Zoobank identifier: LSID urn:lsid:zoobank.org:act:D94F8F97-AE73-450C-A61E-454BA78895BD for Laonice natae

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