日本産砂粒間隙棲等脚目の1新種Microjaera morii（甲殻綱：ミズムシ亜目）

抄録

Microjaera morii, a new species of the family Janiridae (Isopoda: Asellota) is described based on specimens collected from the mid-littoral zone of beach of Nagasaki Prefecture, Japan, as the second species of the genus. The present new species differs from its congener in having an ovate pleotelson, anteriorly projected frontal lobe of head, and a shorter pereonite 1.