Placocoris albovenosus Kormilev 1949

Placocoris albovenosus Kormilev, 1949 (Figs. 7–14) Placocoris albovenosus Kormilev, 1949: 4; Link & Grazia 1987: 121; Froeschner 1995: 543; Grazia & Schwertner 2008: 234; Coscarón et al. 2017: 242; Thomas 2021: 596. Types examined: ARGENTINA, Candelaria, Misiones [-26.8239, -56.1704]; Placocoris albovenosus Kormilev, 1949; male holotype. Deposited in: MACN. Labels: Campo de Taranco / Candelaria, Misiones / 18.II.48 M. Viana // ♂ // Placocoris / albovenosus / Kormilev // Holotipo // 50593 // Dibujado. Material examined: BRAZIL, Rio Grande do Sul, Santa Maria [-29.7198, -53.8692], 1 female, 30-X-1982, A. Dias (UFRG); ARGENTINA, Misiones, Iguazu, [-25.6174, -54.5681], 1 male, 30-I–13- III- 1945, H. W. Golbach (MACN). Diagnosis. Body ocher with luteous spots on scutellum and corial veins (Figs. 7–9, A). Pronotal lateral margins subrectilinear to very slightly sinuous (Fig. 10 A, B). Scutellum width at frenal constriction half the basal width. Corial apical angle almost attaining the posterior margin of connexival segment V, medial and radial vein luteous, the latter with a triangular spot at the apex (Figs. 7–9, A). Metasternum hexagonal, elevated, posterior margin concave receiving the abdominal tubercle (Fig. 8 B). Redescription. Body ocher with luteous spots on scutellum and corial veins (Figs. 7–9, A). Mandibular plates reflected, each wider than clypeus with the outer margin convex, converging towards the apex, inner margins juxtaposed anterior to clypeus, apices rounded. Antennomeres I surpassing mandibular plates, antennomeres III and V with distal half black, antennomere IV black except for a proximal ocher ring; proportion of antennomeres: I<II<III<IV<V (Fig. 10 A, B). Bucculae slightly elevated, rounded anteriorly, evanescent and confluent posteriorly, labium not attaining middle of mesosternum, proportion of labiomeres: I<II>III>IV (Figs. 8 B, 9 B). Thorax. Pronotum lateral margins arched to very slightly sinuous; humeral angles emarginate, rounded (Fig. 10 A, B). Scutellum with base and apex luteous, width at frenal constriction half the basal width. Coria densely punctured; medial and radial vein luteous, the latter with a triangular spot at the apex which extends as a luteous line to the posterior corial margin; corial apical angle almost attaining the posterior margin of connexival segment V (Figs. 7–9, A). Prosternum mesially carinate, mesosternum flat, metasternum hexagonal, elevated, posterior margin concave receiving the abdominal tubercle (Fig. 8 B). Peritreme disc-type, posterior margin sinuous, with anterolateral angle laterally projected (Fig. 10 C, D). Hind femora dilated with spines at distal portion, the last two distinctly larger than the others, more manifest in males (Fig. 10, E, F). Abdomen. Anterior and posterior lateral angles of connexival segments III–VI with black spots, larger on posterior angle (Figs. 7 A, 8 C, 9 C). Tergites III–VI red (Fig. 8 A). Medial portion of urosternites unpunctured. Male. Hind femora as long as the combined length of urosternites III–VII on midline, and about 1.3 times wider than the length of urosternite IV on midline. Genitalia (Figs. 11, 12). Pygophore. Lateral margins straight, diverging towards the posterolateral angles (Fig. 11 A, C); dorsal wall length on midline less than the length of segment X; posterolateral angles rounded (Fig. 11 A, pla); ventral rim emarginated on middle under segment X (Fig. 11 C, vr). Segment X with dense setae along the ogival posterior margin (Fig. 11 A, X). Parameres laterally sinuous; lateral processes rounded, with an apical tuft of thin setae; ventral margins of branches of the parameres’ head bent dorsally, external branch much longer than the internal (Fig. 12 D–F). Phallus. Thecal hood-shaped process as long as the theca (Fig. 12 C, apt); sclerotized denticle placed next to the thecal apex; thecal flaps obsolete; endosoma several times longer than theca (Fig. 5 A–C). Measurements (n=1): Total length 10.00; abdominal width 6.00; head length 1.30; width 1.70; pronotum length 1.90; width 4.80; scutellum length 3.50; width 3.00; length of antennomeres: I 0.50, II 0.50, III 0.80, IV 1.30, V 1.60; length of labiomeres: I 0.30, II 0.80, III 0.60, IV 0.30. Female. Hind femora ca. 0.7 times the combined length of urosternites III–VII on midline, and as wide as the length of urosternite IV on midline. Genitalia (Fig. 13). Valvifers VIII with posterior margins convex, covering valvifers IX (Fig. 13 A, vfVIII); laterotergites VIII with the posterior margin arched (Fig. 13 A, laVIII); laterotergites IX not surpassing mediotergite VIII (Fig. 13 A, laIX). Thickening of vaginal intima ogival at distal margin; distal portion of ductus receptaculi slightly longer than pars intermedialis and capsula seminalis taken together (Fig. 13 B, C, drd); capsula with two digitiform projections (Fig. 13 B, C, pi, cs). Measurements (n=1): Total length 10.40; abdominal width 6.00; head length 1.50; width 1.90; pronotum length 2.00; width 5.00; scutellum length 3.50; width 3.10; length of antennomeres: I 0.50, II 0.60, III 0.90, IV 1.40, V 1.80; length of labiomeres: I 0.30, II 0.90, III 0.60, IV 0.30. Distribution. Brazil and Argentina (Fig. 14).