Abstract
Symmius yamaguchiensis sp. nov described from off Yamaguchi Prefecture, western Japan from a depth of 126 m. The new species differs from its congeners in having nearly straight frontal margin to the head, rudimentary eye pigment, 11 plumose setae on the palm of propodus of pereopod 1, and pereonites 1–7 and pleonite 2 each with mid-dorsal projection. A key to species of the genus is provided.References
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