Heteroscelis bimaculata ( Walker, 1867 )

Sampaio, Vinicius Gomes, Roell, Talita & Campos, Luiz Alexandre, 2023, Revision of Heteroscelis Latreille, 1829 (Heteroptera: Pentatomidae: Asopinae) with the description of a new species from Colombia, Zootaxa 5278 (3), pp. 401-438 : 422-425

Heteroscelis bimaculata ( Walker, 1867)

( Figs. 1 , 20–24 )

Platynopus bimaculatus Walker, 1867: 124 ; Distant 1900: 55 (syn.); Schouteden 1907: 20.

Heterosceloides bimaculata: Schouteden 1907: 20 ; Kirkaldy 1909: 30; Pirán 1961: 87 (syn.).

Heteroscelis bimaculata: Distant 1900: 55 ; Pirán 1961: 87; Thomas 1992: 49; Cambra et al. 2018: 5; Lupoli 2019: 79 ; Roell et al. 2023: 26 .

Heteroscelis doello-juradoi Pirán, 1961: 92 new syn. (removed from the synonymy with H. servillii ).

Heteroscelis denieri Pirán, 1961: 94 ; Thomas 1992: 49 (syn.).

Heteroscelis durionei Pirán, 1961: 95 ; Thomas 1992: 49 (syn.).

Types examined

BRAZIL. Platynopus bimaculatus Walker, 1867 ; male holotype; labels: “PETROPOLIS Feb. 1857. J. Gray” “6. Platynopus bimaculatus ”, “Type”, “ Holotype ”; “NHMUK 010592394”; (NHMUK). Photo examined ( Fig. 21 ).

ARGENTINA. Heteroscelis doello-juradoi Pirán, 1961 ; male holotype; labels: “ HOLOTYPUS ”, “ Heteroscelis doello-juradoi Pirán 1959 ”, “Provincia Jujuy ”; (MACN). Photo examined ( Fig. 22 ).

BOLIVIA. Heteroscelis denieri Pirán, 1961 ; male holotype; “ HOLOTYPUS ”, “ Heteroscelis Latr. ?”, “Chirca 7.IV.31”, “ Heteroscelis denieri Pirán 1959 ”, “1420”; (MLPA). Photo examined ( Fig. 23 A, B ).

BOLIVIA. Heteroscelis durionei Pirán, 1961 ; female holotype; labels:“ HOLOTYPUS ”, “Coroico”, “ Heteroscelis durionei Pirán 1959 ”, “1421”; (MLPA). Photo examined ( Fig. 23 C, D ).

Other material examined. BRAZIL, Rio de Janeiro: (Itatiaia, 700m, -22.41099, -44.57621), 1 female, 1.IV.1925 J.F. Zikán (CEIOC); ECUADOR, Napo: (Tiputini Biodiversity Station, 216m, -0.6379, -76.1495), 1 female, 6.II.1999 T.L. Erwin, et al. (USNM); PERU, Cuzco: (Pilcopata, -14.13262, -69.27723), 1 female (UFRG).

Diagnosis. Coria with a circular yellow spot near to the posterior margin ( Fig. 20 , A); urosternite III tubercle yellow or orange, from apex to the posterior margin of the urosternite; two pairs of yellow abdominal spots, the first pair lateral in urosternites VI and VII, and the second pair mesial in urosternite VII; vesicular area of female genitalia twice longer than the proximal part of the ductus receptaculi.

Redescription

BODY: General color ranging from brown to iridescent purple; some specimens with yellow spots, callous or not, on the head, pronotum and scutellum.

HEAD: Mandibular plates equal to or slightly surpassing clypeus, anteriorly rounded, separated at apex; head length anterior to the eyes equal to 2/3 of the total length of the head ( Fig. 20 , D); labium almost reaching the metasternum; proportion of labiomeres: I<II>III<IV; proportion of antennomeres: I<II<III ≅ IV ≅ V.

THORAX: Coria longer than scutellum, not reaching the posterior margin of the connexival segment VI, uniformly punctured; membrane dark and surpassing posteriorly the abdomen; metapleural evaporatoria surpassing posteriorly the anterior limit of coxae; peritreme disc-shaped, surpassing half the pleural width; apex of peritreme rounded, posterior margin strongly arched, convex, anterior margin almost straight ( Fig. 20 , E); profemora with rudimentary ante-apical spine; foretibial length on average 3.5x larger than the width of the tibial dorsal expansion ( Fig. 20 , F).

ABDOMEN: Posterior angles of urosternites III to VII ending in minute spine ( Fig. 20 , B).

Male

GENITALIA ( Fig. 21 , C; Fig. 22 , D): Pygophore with ventral rim slightly sinuous, shallowly concave medially.

Female

MEASUREMENTS (n=4). Head length 1.04 ± 0.23 (0.75–1.32); width 1.37 ± 0.13 (1.25–1.52); pronotum length 1.70 ± 0.36 (1.38–2.16); width 4.21 ± 0.53 (3.78–4.88); scutellum length 2.46 ± 0.39 (2.20–3.04); width 2.35 ± 0.39 (2.01–2.88); length of antennomeres: I (n=3) 0.31 ± 0.06 (0.25–0.37), II (n=3) 0.67 ± 0.09 (0.56–0.75), III (n=3) 0.79 ± 0.13 (0.69–0.94), IV (n=2) 0.88 ± 0.17 (0.75–1.00); V (n=1) 0.94; length of labiomeres: I 0.70 ± 0.11 (0.63–0.88), II 0.82 ± 0.15 (0.69–1.04), III 0.52 ± 0.09 (0.44–0.64), IV 0.67 ± 0.08 (0.63–0.80); width of foretibal expansion 0.53 ± 0.06 (0.50–0.56); width of abdomen 3.56 ± 0.45 (3.21–4.16); total length 6.26 ± 0.95 (5.41–7.60).

GENITALIA ( Fig. 24 ):Valvifers VIII posterior margin bisinuous, uniformly convex over the base of laterotergites IX; laterotergites VIII wider than long, with spiracles close to the lateral margin. Segment X with the posterior margin straight; valvulae IX with a median hourglass-shaped secondary thickening; capsula seminalis oval.

Distribution: Panama, Ecuador (new record), French Guyana, Brazil, Peru, Bolivia and Argentina ( Fig. 1 ).

Figures

FIGURE 1. Geographic distribution of Heteroscelis Latreille, 1829. The countries highlighted for each species on the small maps are based on literature data. The points marked for each species are from the specimens examined in this paper, and from records retrieved from iNaturalist.

FIGURE 20. Heteroscelis bimaculata (Walker, 1867), female. A, dorsal; B, ventral; C, lateral; D, head and pronotum (dorsal); E, external scent efferent system; F, tibial expansion. Scale bars: A–D = 2mm, E, F = 1mm.

FIGURE 21. Platynopus bimaculatus Walker, 1867, male holotype. A–D, dorsal, lateral, posterior, and labels, respectively (NHMUK). Scale bars:A, B = 2mm. © by The Natural History Museum, London, United Kingdom, Talita Roell, 2022; published with permission.

FIGURE 22. Heteroscelis doello-juradoi Pirán, 1961, male holotype. A–E, dorsal, ventral, lateral, posterior, and labels, respectively (MACN). © by Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”, Buenos Aires, Argentina, Diego Carpintero, 2022; published with permission.

FIGURE 23. Heteroscelis denieri Pirán, 1961, male holotype. A, dorsal; B, labels (MLPA). Heteroscelis durionei Pirán, 1961, female holotype. C, dorsal; D, labels (MLPA). © by Museo de La Plata, La Plata, Argentina, Cecília Melo, 2022; published with permission.

FIGURE 24. Heteroscelis bimaculata (Walker, 1867), female. A, B, genital plates, ventroposterior; C, D, internal genitalia, ventral.Abbreviations: cs = capsula seminalis; id = inner duct of vesicular area; laVIII = laterotergites VIII; laIX = laterotergites IX; md = median duct of vesicular area; od = outer duct of vesicular area; pi = pars intermedialis; tgIX = secondary thickening of valvulae IX; vfVIII = valvifer VIII; vfIX = valvifer IX; vi = thickening of vaginal intima; X = segment X. Scale bars = 1mm.