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OceanRep
Article . 1998 . Peer-reviewed
Data sources: OceanRep
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DIGITAL.CSIC
Article . 2010 . Peer-reviewed
Data sources: DIGITAL.CSIC
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Vulcanoctopus hydrothermalis gen. et sp. nov. (Mollusca, Cephalopoda): an octopod from a deep-sea hydrothermal vent site

Authors: González, Angel F.; Guerra, Angel; Pascual, Santiago; Briand, Patrick;

Vulcanoctopus hydrothermalis gen. et sp. nov. (Mollusca, Cephalopoda): an octopod from a deep-sea hydrothermal vent site

Abstract

[FR] Vulcanoctopus hydrothermalis, gen. et sp. nov. (Mollusca, Cephalopoda): un octopode des sources hydrothermales profondes. Nous décrivons ici deux spécimens d'un octopode des des sources hydrothermales de la ride du Pacifique oriental (13ºN, 2640 m) récoltés pendant la campagne française HOT 96 (CNRS/IFREMER). Ces deux individus sont des mâles, l'un immature et l'autre mature. La diagnose du genre Vulcanoctapus est la suivante: animaux benthiques avec un corps musculeux semi-translucide; absence d'éléments chromatiques dans la peau; yeux sans iris; corps blanc très développé recouvrant le globe oculaire, les nerfs optiques et le lobe optique; glande digestive multilobée; absence de poche à encre. La nouvelle espèce V. hydroihermalis est une petite espèce benthique dont le manteau ne dépasse pas 35 mm de longueur. La partie postérieure du manteau est en forme de mître. Les bras ont 2,5 à 4 fois la longueur du manteau. Le troisième bras droit (III) est le bras hectocotyle, sa partie terminale (ligula) est courte (9,5 % de la longueur du bras), élancée et sans stries transversales. Calamus court (17,9 % de la longueur de la ligula). Chez le mâle adulte les ventouses hypertophiées sont absentes, leur diamètre moyen étant d'environ 6 % de la longueur du manteau. La profondeur du plus grand secteur du voile est d'environ 4,8 % de la longueur du plus long bras. Huit lamelles par demi-branchie. La possibilité de la création d'une nouvelle sous-famille (Vulcanoctopodinae) chez les Octopodidae, l'écologie et les adaptations de cet organisme hydrothermal sont discutées

[EN] We describe two specimens of an octopod from a hydrothermal vent of the East Pacific Rise (13ºN, 2640 m) collected during the French cruise HOT 96 (CNRS/IFREMER). They are two males, one immature and one mature. The diagnosis of this new genus is as follows: benthic animals with a muscular and semi-translucent body; lack of any type of chromatic elements in the skin; eye with no trace of an iris; presence of a large white body covering the eye-ball, the optic nerves and the optic lobe; digestive gland multilobulate; presence of a black bulb, here called dark swelling, in proximal third of the intestine; presence of a crop and absence of an ink sac. The new species Vulcanoctopus hydrothermalis is a small benthic animal up to 35 mm mantle length. The posterior part of the mantle is mitre-like. Arms 2.5-4 times the length of the mantle. Right arm III hectocotylized. Ligula short (9.5 % of the hectocotylized arm), lance-shaped and without transverse ridges. Calamus short (17.9% of the ligula length). In adult males enlarged suckers absent, and the diameter of the largest sucker is about 6% of the mantle length. Depth of the largest sector of the web about 4.8% of the longest arm. Gills with eight lamellae per demibranch. The possibility of raising a new sub-family (Vulcanoctopodinae) of Octopodidae, the ecology and adaptations of these vent animal are discussed

This work was funded by the URM 7 IFREMER and DORSALES Program

16 pages, 26 figures, 2 tables.

Peer reviewed

Countries
Germany, Spain
Keywords

Vulcanoctopus hydrothermalis, Octopodidae, east Pacific Rise, Hydrothermal vent, East Pacific Rise, Cephalopod

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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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