A new species of genus Sapphirina (Copepoda, Cyclopoida) from the Kuroshio Extension region in the western North Pacific Ocean

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  • Takahashi Kazutaka
    Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences, The University of Tokyo
  • Itoh Hiroshi
    Suidosha Co. Ltd.
  • Hirai Junya
    Atmosphere and Ocean Research Institute, The University of Tokyo
  • Tadokoro Kazuaki
    Shiogama Field Station, Fisheries Resource Institute, Japan Fisheries Research and Education Agency
  • Nishiuchi Koh
    Nagasaki Field Station, Fisheries Resource Institute, Japan Fisheries Research and Education Agency

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タイトル別名
  • A new species of genus <i>Sapphirina</i> (Copepoda, Cyclopoida) from the Kuroshio Extension region in the western North Pacific Ocean

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<p>A new species of sapphirinid copepod, Sapphirina doliolettae n. sp. was described from the Kuroshio Extension region in the western North Pacific Ocean. The new species is similar to S. nigromaculata and S. scarlata with respect to the following characteristics: 5-segmented antennule, one inner marginal process on caudal rami, and slender endopods with two apical spines on leg 4. However, it can be distinguished from these congeners by a combination of the following characteristics: the relative length of each segment of the antennule and antenna in both sexes, the width of the fourth pedigerous somite in females, the shape of the anterolateral corner of the genital somite in males and terminal process length of 3rd endopodal segment of leg 2 in males. The mitochondrial cytochrome oxidase subunit I sequences of S. doliolettae showed high interspecific variabilities from other Sapphirina species, including S. nigromaculata (20.2%) and S. scarlata (21.6–21.8%).</p>

収録刊行物

  • Plankton and Benthos Research

    Plankton and Benthos Research 17 (4), 358-368, 2022-11-30

    日本プランクトン学会、日本ベントス学会

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