Two new species of the genus Leipsuropus (Crustacea: Amphipoda: Podoceridae) from Japanese and Korean waters

摘要

Two new species of the amphipod genus Leipsuropus Stebbing, 1899 are described. Leipsuropus astericolus sp. nov. was collected from the surface of a starfish in Japanese waters and L. hongi sp. nov. from the bottom in Korean waters. Both species havedistinct projections on dorsal and lateral surfaces of head, pereonites 1-7 and pleonites 1, 2, and the projections were acute in L. astericolus and blunt in L. hongi. These new species are quite different from L. parasiticus (Haswell, 1879) in Australian waters which has only dorsal rugae on pereonites 1-5. They are also distinguishable from L. sinensis Ren, 2012 in Chinese waters in their sinuate palms of the male gnathopod 2. A key to species of the genus is provided.