Characters/species;"Theosbaena cambodjiana";"Theosbaena kiatwongchai";"Theosbaena loko sp. n." "Flagellum on antenna 1";29;25;19 "Accessory flagellum";14;13;10 "Ocular scales";"evenly arcuate and rounded";"more transverse, with the widest point being just medial to the centre-line of the structure.";"evenly arcuate and rounded" Mandible; ; ;  "     Palp segment";1:2:1;1:2:3;1:2:1 "     Setae";"8 plumidenticulate macrosetae";"6 microsetae";"6 plumose macrosetae" "Corpus mandibula";"L- 6 dentate, R-4 dentate";N/A;"L- 6 dentate, R-5 dentate" "Maxilla I palp- distal palpomere: proximal palpomere";subequal;twice;"four times" "Maxillopodal exopod";"1.5 times its basal width";"greatly reduced, as long as width and the point of articulation is not clear; fused";"twice as long as basal width" "Gnathopod dactylus"; ; ;  "     shape";subrectangular;"subtriangular, widest apically";subrectangular "     membranous macrosetae";"present (3)";absent;"present (3)" "     dorsoapical ungual spine";absent;present;present "     ventroapical setal tuft";absent;present;present "     distal margin";"widened and somewhat flattened";convex;convex "     distomedial angle";N/A;"a row of short setae";inerm "      unguis";"three arced (modified) serrulate macrosetae (type IIB1) with a prominent membrane ventrally.";"single curved spine at the distolateral corner.";"three curved spines at the distolateral corner." "Pereopod 7"; ; ;  "     coxa";not pronounced;pronounced;not pronounced "     Exopod: endopod";N/A;0.8;0.8 "     Basal segment";N/A;"rectangular, with a spine at distolateral corner";"suboval, inerm. " "Penial lobe";"subcylindrical and slightly bent";"straight and fusiform";"simple, naked, tall, almost straight" "Ple I";present;absent;absent Uropod; ; ;  "      Endopod";"Oval, distal segment bearing elongate plumose macrosetae subequal to endopod, lateral edge ismargined with a row of scaliform macrosetae.";"Oval, distal segment bearing elongate plumose macrosetae shorter than exopod, lateral edge margined with small spiniform macrosetae and two filiform plumose setae at mid-length.";"Suboval, distal segment bearing elongate plumose macrosetae subequal to exopod, lateral edge ismargined with a row of scaliform macrosetae." "      Exdopod";"Distal segment subovate, lateral margin with elongate plumose macrosetae, medial edge without spines; segment apex with single elongate spine 0.8x the length of the segment.";"Distal segment subovate, lateral margin with elongate, plumose macrosetae; medial edge margined with spines; segment apex with single elongate spine 0.8x length ofsegment.";"Distal segment subovate, lateral margin with elongate, plumose macrosetae; medial edge margined with stoutspines; segment apex without elongate spine." Telson;entire;emarginate;emarginate "Telson length/width ratio";0.8;1.2;1.8 "Telson apex";"apical region margined with macrosetae, apex entire.";"apex lobes have curved, rigid spines that arc medially towards the medial cleft";"apex lobes have curved, rigid spines that arc medially towards the medial cleft"