Placocoris albovenosus Kormilev, 1949

Placocoris albovenosus Kormilev, 1949

( Figs. 7–14 View FIGURE 7 View FIGURE 8 View FIGURE 9 View FIGURE 10 View FIGURE 11 View FIGURE 12 View FIGURE 13 View FIGURE 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 View Cited Treatment .

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) GoogleMaps ; ARGENTINA, Misiones, Iguazu , [ -25.6174, -54.5681], 1 male, 30-I–13- III- GoogleMaps 1945, H. W. Golbach ( MACN) .

Diagnosis. Body ocher with luteous spots on scutellum and corial veins ( Figs. 7–9 View FIGURE 7 View FIGURE 8 View FIGURE 9 , A). Pronotal lateral margins subrectilinear to very slightly sinuous ( Fig. 10 A, B View FIGURE 10 ). 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 View FIGURE 7 View FIGURE 8 View FIGURE 9 , A). Metasternum hexagonal, elevated, posterior margin concave receiving the abdominal tubercle ( Fig. 8 B View FIGURE 8 ).

Redescription. Body ocher with luteous spots on scutellum and corial veins ( Figs. 7–9 View FIGURE 7 View FIGURE 8 View FIGURE 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 View FIGURE 10 ). 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 View FIGURE 8 , 9 B View FIGURE 9 ).

Thorax. Pronotum lateral margins arched to very slightly sinuous; humeral angles emarginate, rounded ( Fig. 10 A, B View FIGURE 10 ). 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 View FIGURE 7 View FIGURE 8 View FIGURE 9 , A). Prosternum mesially carinate, mesosternum flat, metasternum hexagonal, elevated, posterior margin concave receiving the abdominal tubercle ( Fig. 8 B View FIGURE 8 ). Peritreme disc-type, posterior margin sinuous, with anterolateral angle laterally projected ( Fig. 10 C, D View FIGURE 10 ). Hind femora dilated with spines at distal portion, the last two distinctly larger than the others, more manifest in males ( Fig. 10 View FIGURE 10 , E, F).

Abdomen. Anterior and posterior lateral angles of connexival segments III–VI with black spots, larger on posterior angle ( Figs. 7 A View FIGURE 7 , 8 C View FIGURE 8 , 9 C View FIGURE 9 ). Tergites III–VI red ( Fig. 8 A View FIGURE 8 ). 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 View FIGURE 11 , 12 View FIGURE 12 ). Pygophore. Lateral margins straight, diverging towards the posterolateral angles ( Fig. 11 A, C View FIGURE 11 ); dorsal wall length on midline less than the length of segment X; posterolateral angles rounded ( Fig. 11 A View FIGURE 11 , pla); ventral rim emarginated on middle under segment X ( Fig. 11 C View FIGURE 11 , vr). Segment X with dense setae along the ogival posterior margin ( Fig. 11 A, X View FIGURE 11 ). 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 View FIGURE 12 ). Phallus. Thecal hood-shaped process as long as the theca ( Fig. 12 C View FIGURE 12 , apt); sclerotized denticle placed next to the thecal apex; thecal flaps obsolete; endosoma several times longer than theca ( Fig. 5 A–C View FIGURE 5 ).

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 View FIGURE 13 ). Valvifers VIII with posterior margins convex, covering valvifers IX ( Fig. 13 A View FIGURE 13 , vfVIII); laterotergites VIII with the posterior margin arched ( Fig. 13 A View FIGURE 13 , laVIII); laterotergites IX not surpassing mediotergite VIII ( Fig. 13 A View FIGURE 13 , 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 View FIGURE 13 , drd); capsula with two digitiform projections ( Fig. 13 B, C View FIGURE 13 , 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 View FIGURE 14 ).