The Genus Kamaka (Crustacea, Amphipoda, Kamakidae) from Korean Brackish Waters, with Description of Newly Recorded Species, Kamaka morinoi

The Genus Kamaka (Crustacea, Amphipoda, Kamakidae) from Korean Brackish Waters, with Description of Newly Recorded Species, Kamaka morinoi

Three species of the genus Kamaka have been reported from Korean brackish waters. Among them, Kamaka morinoi is identified as a newly recorded species in Korea. Previously, two species, K. excavata and K. rostra, were reported from the intertidal zone of Korea. However, this study confirms that these species also inhabit brackish water areas in Korea. The newly recorded species, Kamaka morinoi, is morphologically similar to K. biwae and K. rostra, but can be distinguished from its congeners by the shape of the propodus of gnathopod 2, the absence of protuberances on the posteroventral margin of peduncular articles 4-5, and differences in the number of plumose setae on the posterior margin of the basis of pereopod 7. This newly recorded species is described and fully illustrated in the present study. A key to the Korean Kamaka species is provided.