A New Species of Eudrella (Crustacea, Cumacea) from the Seto Inland Sea of Japan

摘要

A new species of the cumacean genus Eudrella (Leuconidae), is described from the central region of the Seto Inland Sea of Japan. Although female specimens of this species very closely resemble Eudrella truncatula (Bate, 1856) from the Atlantic coast and the Mediterranean Sea, male specimens are easily distinguished from E. truncatula in having only a single prominent tooth on the antero-lateral corner of the carapace, and a very long uropod endopod. In addition, the adult male antenna bears a short flagellum, which reaches to the anterior margin of the first or second abdominal segment and is a unique characteristic for the genus.