"Species Characters";"P. gigas (♂)";"P. houtete (♀)";"P. jindoensis (♀)";"P. marlie s.l. (♀)";"P. micronesica (♂?)";"P. acuta sp. nov. (♀)" "Body length";"3.5 mm";"3.7 mm";"5.5 mm";"3.5 mm";"3.0 mm";"5.5 mm" "Pleonites tooth formulae";1-3-3-3-0;1-3-3-3-0;1-3-3-3-0;1-3-3-3-0;1-3-3-3-0;1-3-3-3-0 1-3-3-1 "Ocular lobe";acute;acute;acute;acute;acute;acute "Lower lip, corn";"1 cone";"2 cones";"2 unequal cones";"2 cones";"1 cone";"2 cones" "Mandibular process";"blunt, weakly developed";"apically hooked";"apically hooked";"apically hooked";"blunt, weakly developed";"apically hooked" "Mandible, accessory spines";"no spine";"2 spines";"2 or 3 tiny spines";?;"no spine";"2 or 3 spines" "Maxilla 1, palp";"5 apical setae";"8 setae";"6 apical setae";"7 apical setae";"5 apical setae";"11 apical setae" "Maxilla 2, inner margin of inner plate";"no seta";"no seta";"5 setae";"4 setae";"4 setae";"5 setae" "Maxilliped, inner plate";"no lateral seta";"no lateral seta";"7 lateral setae";"no lateral seta";"no lateral seta";"no lateral seta" "Maxilliped, outer plate";"11 conical teeth";"12 conical teeth";"16 conical teeth";"12 conical teeth";"11 conical teeth";"17 conical teeth" "Antenna 1, articles 1 & 2 ratio";"1.0 : 1.5";"1.0 : 1.1";"1.0 : 1.5";"1.0 : 1.1";"1.0 : 2.0";"1.0 : 1.3" "Gnathopod 1, interior setae of propodus";"4 setae";"5 setae";"8 setae";"9 setae";"4 setae";"10 or 11 setae" "Gnathopod 1, carpus & propodus ratio";"1.0 : 0.9";"1.0 : 0.9";"1.0 : 0.9";"1.0 : 1.3";"1.0 : 1.0";"1.0 : 0.9" "Gnathopod 2, carpus & propodus ratio";"1.0 : 0.7";"1.0 : 0.8";"1.0 : 0.9";"1.0 : 0.8";"1.0 : 0.5";"1.0 : 0.9" "Pereopod 6, basis";"tapering posterodistally";"excavated posterodistally";"roundly produced posteriorly";"roundly produced posteriorly";"slightly tapering posterodistally";"roundly produced posteriorly" "Coxa 7";"rounded posteroventrally";"pointed posteroventrally";"rounded posteroventrally";"pointed posteroventrally";"pointed posteroventrally";"pointed posteroventrally" "Pereopod 7, basis";subovate;subrectangular;"subrectangular, narrow";"subrectangular, narrow";"elongate-ovate, moderate";"subrectangular, narrow" Telson;"cleft, roundish marginally, 1 lateral spine";"slender and longish, 4 or 5 lateral spines";"slender and longish, 14 or 15 lateral spines";"elongate-ovate, 7 lateral spines";"slender and longish, 2 lateral spines";"slender and longish, 7 or 9 lateral spines" Distribution;"Tomioka bay, Japan";"New Zealand";"Jindo Island, Korea";"Tomioka bay, Japan";"Tomioka bay, Japan";Korea References;"Hirayama, 1984";"Barnard, 1972b";"Kim & Lee, 2008";"Hirayama, 1984";"Hirayama, 1984";"Present study"