Sacculina polygenea, a new species of rhizocephalan (Cirripedia: Rhizocephala) from Japan, parasitic on the intertidal crab Hemigrapsus sanguineus (De Haan, 1835) (Decapoda: Brachyura: Grapsidae)

  • Lutzen Jorgen
    Department of Cell Biology and Anatomy, Zoological Institute, University of Copenhagen
  • Takahashi Tohru
    Department of Fisheries, Kyushu University

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  • Sacculina polygenea a new species of rh

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Description

A new species of rhizocephalan, Sacculina polygenea, is described and illustrated on basis of material from the Amakusa Islands, Kyushu, Japan. Although previously recorded as a locally common parasite of the littoral crab Hemigrapsus sanguineus (de Haan, 1835), it has remained undescribed. The species is compared with S. senta Boschma, 1933 and S. nigra Shiino, 1943, which parasitize the same crab. Up to 5 concentric cuticular rings surround the stalk and adjacent part of the body. Such rings have never before been observed in any species of the genus and are probably evidence that S. polygenea moults its outer cuticle up to 5 times.

Journal

  • Crustacean Research

    Crustacean Research 26 (0), 103-108, 1997

    Carcinological Society of Japan

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