Character;"N. absentia";"N. obesa";"N. trajani";"N. knotti sp. n.";"N. karanovici sp. n." "Genital and first abdominal somites fused ventrally";No;No;No;Yes;Yes "Integumental window on body";Absent;Absent;Absent;"1 present on 2nd and 3rd prosomites and on 3rd urosomite";"1 pair present on 2nd and 3rd urosomites" "Spinules along posterior margin of anal operculum";Present;Absent;Present;Present;Present "No. of setae on antennal exopod";3;3;3;2;3 "No. of armature elements on distal exopodal segment of leg 1";4;4;4;4;5 "Spinules on distolateral lobes of intercoxal sclerite of leg 2";Absent;Present;Absent;Present;Absent "No. of armature elements on distal exopodal segment of legs 2 and 3";5;4;4;4;5 "No. of armature elements on distal endopodal segment of leg 2";4;3;3;4;2 "No. of armature elements on distal endopodal segment of leg 3";4;3;4;4;3 "Outer spine on middle exopodal segment of leg 4";Absent;Present;Present;Present;Present "No. of armature elements on distal endopodal segment of leg 4";4;3;3;3;2 "No. of armature elements on basoendopodal lobe of leg 5";4;1;4;3;4