First Recorded Family Odiidae (Crustacea, Amphipoda, Gammaridea) from the Korean Coast, with Description of Newly Recorded Species

A newly recorded species of gammaridean amphipod, Cryptodius kelleri (Bruggen, 1907) belonging to the family Odiidae Coleman and Barnard, 1991 collected from the east coastal area of Korea. Cryptodius kelleri (Bruggen) is characterized by the medially expanded maxillipedal palp article 2, smooth dorsal pereonites, propodochelate gnathopod 1, subchelate gnathopod 2, lacking the posterior process on the basis of pereopods 5-7, dorsal carination of pleonite 3, posterolateral upturned process of pleonite 3, and an entire telson. The species is described and fully illustrated in the present study. A key is also provided to the species of genus Cryptodius. This is the first record of the family Odiidae from Korea.