Review of the genus Elasmostethus (Hemiptera: Heteroptera: Acanthosomatidae) from the Korean Peninsula Author Jung, Sunghoon text Zootaxa 2017 2017-09-15 4320 2 351 365 journal article 32087 10.11646/zootaxa.4320.2.9 1f178728-7a1b-402e-a7c2-7caa361f39f5 1175-5326 891940 03F80D25-6622-40C5-9856-235E8A7Cd9Dc Key to the Korean species of Elasmostethus 1 Mediotergites of abdominal segments V–VII entirely dark; posterior margin of pygophore with a pair of pigmented denticles ( Figs. 41–42 )......................................................................................... 2 - Mediotergites of abdominal segments V–VII at least partly pale; posterior margin of pygophore without paired pigmented denticles (a median projection might be present on ventral infolding)................................................ 3 2 Posterolateral angles of segment VII produced slightly beyond posterior margin of pygophore (Fig. 29); pigmented denticles on pygophore ( Fig. 41 : ld) situated far from submedian setal tufts, almost in middle of the lateral margin; posterior margins of abdominal segment VIII of female enclosing an obtuse angle, weakly protruding posteriad in the middle (Fig. 30)........................................................................................... E. brevis Lindberg, 1934 - Posterolateral angles of segment VII produced far beyond posterior margin of pygophore (Fig. 31); pigmented denticles on pygophore ( Fig. 42 : ld) situated immediately laterad of submedian setal tufts; posterior margin of abdominal segment VIII of the female slightly emarginate in the middle (Fig. 32)............................... E. interstinctus ( Linnaeus, 1758 ) 3 Mediotergites of abdominal segments V–VII entirely pale; pygophore with setal tuft at middle of ventral margin ( Figs. 43, 44 ); posterior margin of abdominal segment VIII of female convex at two sides, emarginate medially (Figs. 34, 36)........... 4 - Mediotergites of abdominal segments V–VII partly pale; pygophore without setal tufts ( Figs. 45, 46 ); female genital segment with posterior margin forming approximately a single arc, not emarginate medially (Figs. 38, 40)...................... 5 4 Ventral margin of pygophore with a single median setal tuft, its infolding with a long, dorsocaudally directed, sclerotized and pigmented projection ( Figs. 44, 47 ); paramere with bisinuate lateral margin ( Fig. 51 ); posterior margin of abdominal segment VIII of female deeply excised medially........................................... E. yunnanus Hsiao & Liu, 1977 - Ventral margin of pygophore with two (an upper and a lower) submedian pairs of setal tufts, without sclerotized median projection ( Fig. 43 ); paramere with simple, nearly straight lateral margin ( Fig. 50 ); posterior margin abdominal segment VIII of female slightly emarginate medially................................................. E. humeralis Jakovlev, 1883 5 Posterolateral angles of abdominal segment VII more strongly produced, sharp in both sexes (Figs. 37, 38); pronotum with more or less rectangular humeri; pygophore with rounded posterior margin provided with dense setae in ventral view (Fig. 37); paramere with obtuse outer apical angle ( Fig. 52 )......................................... E. nubilus (Dallas, 1852) - Posterolateral angles of abdominal segment VII less strongly produced, obtuse in both sexes (Figs. 39, 40); pronotum with obtuse humeri; male genital segment with nearly straight posterior margin provided with sparse setae (Fig. 39); paramere with rounded outer apical angle ( Fig. 53 )................................................ E. rotundus Yamamoto, 2003