Two new species of the genus<i>Mesocletodes</i>(Copepoda, Harpacticoida, Argestidae) from the Pacific Ocean, San Diego Trough

Vakati, Vinod; Thistle, David; Lee, Wonchoel

doi:10.2988/16-00013

Cited by 2 publications

(1 citation statement)

References 16 publications

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“…Most taxonomic studies on abyssal harpacticoids have been performed in the Atlantic (Seifried 2004) and a limited number of papers are available on the deep-sea harpacticoid fauna from the Pacific (e.g. Itô 1982, 1983; Humes and Voight 1997; Huys and Conroy-Dalton 1997; Lee and Yoo 1998; Conroy-Dalton and Huys 1999, 2000; Lee and Huys 1999, 2000; López-González et al 2000; Gollner et al 2008; Back et al 2010; Cho et al 2016; Gómez and Díaz 2017; Vakati et al 2017; Gómez 2018a-c; George and Schwabe 2019).…”

Section: Introductionmentioning

confidence: 99%

Description of two deep-water copepods of the genus Leptotachidia Becker from the northwestern Pacific (Harpacticoida, Pseudotachidiidae)

Kim¹,

Yu²,

Lee³

2019

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The monospecific genus Leptotachidia Becker, 1974 (Pseudotachidiidae Lang, 1936) was previously known only from the deep Atlantic. Female specimens of two unknown species of this genus were collected from abyssal sediments during an expedition to the northwestern Pacific on board research vessel ISABU (Korea Institute of Ocean Science and Technology) in November 2017. In this paper we describe the females of two new species, L. senariasp. nov. and L. apousiasp. nov. The new species were attributed to the genus Leptotachidia by the combination of the five-segmented female antennule, presence of the Brodskaya organ on the distal antennulary segment, and the second exopodal segments of second to fourth legs without inner setae. An outstanding character of both Pacific species is the reduced armature of thoracic legs in contrast to the type species, L. iberica Becker, 1974. In addition, the setal armature of L. senariasp. nov. and L. apousiasp. nov. is unique within the genus in that the female leg 5 of L. senariasp. nov. has six elements instead of five; and the antennary exopod of L. apousiasp. nov. bears a single seta on the proximal segment instead of two. This is the first record of Leptotachidia from the Pacific. A key to all three species of Leptotachidia is provided.

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Section: Introductionmentioning

confidence: 99%

Description of two deep-water copepods of the genus Leptotachidia Becker from the northwestern Pacific (Harpacticoida, Pseudotachidiidae)

Kim¹,

Yu²,

Lee³

2019

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New species of the genus Mesocletodes Sars, 1909 from the deep Gulf of California (Copepoda, Harpacticoida)

Gómez¹

2018

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Investigations on the effects of the oxygen minimum zone on the distribution, abundance, and diversity of deep-sea benthic and pelagic fauna of the Gulf of California and Eastern Tropical Pacific has received attention recently. However, very little is known about the diversity of deep-sea benthic harpacticoids from this region, and only three species, Ancorabolus hendrickxi Gómez & Conroy-Dalton, 2002, Ceratonotus elongatus Gómez & Díaz, 2017 and Dendropsyllus californiensis Gómez & Díaz, 2017, have been described so far. The genus Mesocletodes Sars, 1909 is one of the most common and abundant genera of deep-sea harpacticoids. This genus has been traditionally subdivided into two species groups, the abyssicola and the inermis groups, based on the presence/absence of a dorsal cuticular process on the cephalothorax and anal somite, but some species have been reported to deviate from this scheme. As a result of their investigations, other researchers proposed the monophyly of the abyssicola group, and suggested the probable monophyly of two other species-groups. In this paper, the descriptions of three new species of the genus Mesocletodes from the deep sea of the Gulf of California are presented with some notes on their relationships with other species. Some comments on the monophyly of the genus are given.

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Two new species of the genusMesocletodes(Copepoda, Harpacticoida, Argestidae) from the Pacific Ocean, San Diego Trough

Cited by 2 publications

References 16 publications

Description of two deep-water copepods of the genus Leptotachidia Becker from the northwestern Pacific (Harpacticoida, Pseudotachidiidae)

Description of two deep-water copepods of the genus Leptotachidia Becker from the northwestern Pacific (Harpacticoida, Pseudotachidiidae)

New species of the genus Mesocletodes Sars, 1909 from the deep Gulf of California (Copepoda, Harpacticoida)

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