Gaussia princeps (Scott) (Copepoda, Calanoida, Metridinidae) from the Indo-Pacific, with Notes on the Zoogeography of the Genus

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  • Soh Ho Young
    Fisheries Laboratory, Hiroshima University:(Present address)Chonnam National University, Department of Oceanography
  • Ohtsuka Susumu
    Fisheries Laboratory, Hiroshima University
  • Imabayashi Hiromichi
    Faculty of Applied Biological Science, Hiroshima University
  • Sawamoto Shozo
    Institute of Oceanic Research & Development, Tokai University

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  • Gaussia princeps Scott Copepoda Calanoida Metridinidae from the Indo-Pacific

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Abstract

Gaussia princeps (Scott, 1894) (Copepoda : Calanoida : Metridinidae) is redescribed from the Indo-Pacific region on the basis of two adult females, one adult male, and the fifth copepodid stage of both sexes and compared with the holotype from the Gulf of Guinea. The specimens of G. princeps from the Indo-Pacific region showed no remarkable differences from the holotype. The morphological differences from its two congeners are also discussed. The genital compound somite of the female of G. princeps carries paired gonopores and copulatory pores located antero- and postero-ventrally, respectively, without distinct seminal receptacles ; this arrangement differs from those of other genera of the family Metridinidae. Present and previous data indicate that G. princeps is widely distributed in the mesopelagic zone of the oceans throughout the tropical to temperate regions, but there are some morphological evidences that the southeastern pacific population represents a distinct species.

Journal

  • Species Diversity

    Species Diversity 3 (2), 169-186, 1998

    The Japanese Society of Systematic Zoology

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