The lygaeoid bug family Heterogastridae (Hemiptera: Heteroptera: Lygaeoidea) from Laos and Thailand, with descriptions of three new species Author Ban, Teruaki text Zootaxa 2018 2018-07-16 4446 1 51 67 journal article 29524 10.11646/zootaxa.4446.1.4 d35cedde-4442-4a14-be2d-d5213a12ab29 1175-5326 1437384 E5ABBD4C-C643-4091-9AD4-D9D4028A218A Key to species of Sadoletus from Laos , Thailand and adjoining countries 1 Body length less than 3.5 mm ................................................................. S . montanellus - Body length more than 3.5 mm ........................................................................... 2 2 Labium slightly exceeding posterior margin of prothorax, not reaching mesocoxae; corium with black area in both sexes; hemelytra with dark markings at inner angle of corium and hemelytral membrane...................................... 3 - Labium reaching at least mesocoxae; corium without black area in female; hemelytra lacking dark marking at inner angle of corium and hemelytral membrane......................................................................... 4 3 Posterior lobe of pronotum with 2 pale brown markings; hemelytral membrane with pale brown transverse marking at middle; abdominal sterna reddish brown; ovipositor straight from ventral view; posterior margin of pygophore and cuplike sclerite not fused; paramere narrow and acute at apex.................................................... S. laosensis sp. nov. - Posterior lobe of pronotum with 2 dark brown markings arranged transversely and 2 dark spots at lateral angle; hemelytral membrane with black circular marking at middle; abdominal sterna black; ovipositor strongly curved from ventral view; posterior margin of pygophore and cuplike sclerite fused together; paramere sickle-shaped at apex......... S . melasmus sp. nov. 4 Antennal segment III blackish; corium with black to dark brown area at least in male; each abdominal laterotergite in both sexes unicolored (connexiva entirely brown or black)......................................................... 5 - Antennal segment III yellowish; corium without black to dark brown area in both sexes; each abdominal laterotergite in both sexes bicolored (pale brown anteriorly and black posteriorly)................................................... 7 5 Antennal segment I black; ground color of posterior lobe of pronotum dark brown; pro- and mesofemora and tibiae entirely black......................................................................................... S . corvus - Antennal segment I yellow; ground color of posterior lobe of pronotum brownish yellow; pro- and mesofemora and tibiae brownish yellow...................................................................................... 6 6 Posterior lobe of pronotum without dark longitudinal marking; apical half of corium without black area in female; femora and tibiae without annulations......................................................................... S . bakeri - Posterior lobe of pronotum with dark longitudinal marking; apical half of corium black in female; femora and tibiae with annulations................................................................................... S . ryukyuensis 7 Rostrum reaching metacoxae; hemelytra not surpassing apex of abdomen; corium subhyaline; posterior margin of sternite VI sinuate; apex of paramere laminated........................................................... S. subpellucidus - Rostrum not reaching metacoxae; hemelytra surpassing apex of abdomen; corium white; posterior margin of sternite VI concave; apex of paramere laminated......................................................................... 8 8 Antennal segment II more than twice longer than segment I; posterior lobe of pronotum more than 1.5 times longer than anterior lobe; profemur without dark markings; basal one-third of paramere twisted............................. S . valdezi - Antennal segment II less than twice longer than segment I; posterior lobe of pronotum less than 1.3 times longer than anterior lobe; profemur with dark markings; basal one-third of paramere not twisted................................ S . validus