On some species of the genera Campylaspenis and Campylaspis (Crustacea, Cumacea, Nannastacidae) from the Sea of Japan (Northwest Pacific), with description of a new species of Campylaspenis.

The cumacean genus Campylaspenis (Cumacea: Nannastacidae) currently consists of two species, characterized by an unusual character, the presence of a pair of large penial lobes in adult males, the only character which distinguishes the genus from the…

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