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

Laonice species (Polychaeta, Spionidae) from the Whittard Canyon (NE Atlantic) with descriptions of two new species
Laonice species (Polychaeta, Spionidae) from the Whittard Canyon (NE Atlantic) with descriptions of two new species
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.
0025-3154
961-973
Sikorski, Andrey
f7613566-f76a-4787-ae53-83df72a4e4ca
Gunton, Laetitia M.
8a51e73d-fb9f-429a-aad7-880ae75e0b7d
Pavlova, Lyudmila
80423b3e-5ebb-4c7a-bbf5-9e7fe0f3ad7d
Sikorski, Andrey
f7613566-f76a-4787-ae53-83df72a4e4ca
Gunton, Laetitia M.
8a51e73d-fb9f-429a-aad7-880ae75e0b7d
Pavlova, Lyudmila
80423b3e-5ebb-4c7a-bbf5-9e7fe0f3ad7d

Sikorski, Andrey, Gunton, Laetitia M. and Pavlova, Lyudmila (2017) Laonice species (Polychaeta, Spionidae) from the Whittard Canyon (NE Atlantic) with descriptions of two new species. Journal of the Marine Biological Association of the United Kingdom, 97 (05), 961-973. (doi:10.1017/S0025315417000480).

Record type: Article

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.

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More information

Accepted/In Press date: 10 March 2017
e-pub ahead of print date: 10 August 2017
Published date: 10 August 2017

Identifiers

Local EPrints ID: 414035
URI: http://eprints.soton.ac.uk/id/eprint/414035
ISSN: 0025-3154
PURE UUID: a963ee08-3482-49ab-9d3e-bab198aba4c0

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Date deposited: 13 Sep 2017 16:31
Last modified: 07 Jan 2022 22:46

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Contributors

Author: Andrey Sikorski
Author: Laetitia M. Gunton
Author: Lyudmila Pavlova

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