Pentatoma bifida

Santos, Bianca Tamires Silva Dos, Silva, Valeria Juliete Da & Fernandes, Jose Antonio Marin, 2015, Revision of Ascra with proposition of the bifida species group and description of two new species (Hemiptera: Pentatomidae: Edessinae), Zootaxa 4034 (3), pp. 445-470 : 447-448

Species group bifida

Diagnosis. Punctures large, deep, and sparse on pronotum and scutellum ( Figs. 52–53, 55–58 ). Punctures on disk of hemelytron smaller and usually lighter than on embolium and clavus. Dorsal rim of pygophore with raised punctate band delineated by lateral sulcus. Phallotheca with a distinct dorsal projection.

Head. Dorsal surface green to brownish ( Figs. 52−58 ); punctures sparse. Mandibular plates rugulose, levelled with clypeus. Ventral surface yellow, green or reddish, not punctate ( Figs. 59−65 ). Anterior margin anterior of bucculae rounded or subtriangular variable in size.

Thorax. Dorsal surface green to brownish. Pronotum clearly convex with sparse large dark punctures ( Figs. 52–58 ); anterolateral angles not developed; anterolateral margins yellow to red and emarginated. Scar pronotal delimited by sulci and not or sparsely punctate. Corium usually brown to dark brown with punctures shallow and sparse. Embolium and clavus with black punctures. Embolium more densely punctate than remainder of corium; anterior margin tumid and not punctate. Membranous part of wings fumose, clear in A. abdita . Ventral surface greenish yellow to reddish ( Figs. 59–65 ) with dense punctation on prothorax, mesopleura, part of metapleura and coxae. Peritreme slightly raised. Metasternal process smooth, yellow and short– developed below level of coxae in lateral view; anterior bifurcation with short arms ( Figs. 2 , 9 , 39 , 46 ), apices evanescent rounded or acute and reaching only middle third of mesosternum. Legs yellow.

Abdomen. Connexival segments green to brown ( Figs. 52–58 ), densely punctate except on a central rounded impuctate area; lateral angles usually spiniform and dark. Ventral surface yellow to brown and sparsely punctate except on more densely punctate lateral sides, median longitudinal area with or without punctures. Intersegmentar region and pseudosutures concolorous with surrounding area or brown. Spiracles elliptical on lightly calloused area. One trichobothrium located in line with and the other laterad to spiracles. Segment VII concolorous with the others; posterior angle not developed.

Female genitalia. Gonocoxites 8 with dark or concolorous punctures close to lateral margin; posterior margin rounded sometimes projected over base of laterotergites 9. Laterotergites 8 with sparse dark or concolorous punctures; apices usually black and spiniform. Gonocoxites 9 with two slightly tumid areas on proximal margin touching or barely overlapping gonocoxites 8 ( Fig. 12 ). Laterotergites 9 tumid distally; apices black and spiniform surpassing band uniting laterotergites 8. Segment X setose and rugulose ( Fig. 4 , 12 , 20 , 27 , 34 , 41 , 48 ,).

Male genitalia. Dorsal rim of the pygophore dark and densely punctate on a narrow flat lateral band enhanced by a lateral sulcus and a distal constriction before posterolateral angle ( Figs. 5 , 13 , 21 , 28 , 35 , 42 , 49 ). Posterolateral angle punctate in both inner and outer sides. Superior process of genital cup pedunculate or not, elliptical or reniform ( Figs. 7 , 15 , 23 , 30 , 37 , 44 , 51 ) and dark. Posterior face of proctiger rugulose; lateral sides shallowly excavated and densely setose. Ventral surface densely punctate, punctures covering distal half of pygophore. Ventral rim with a central excavation delimited by tumid rounded or pyramidal projections (before e.g. Figs. 6, 7 , 14, 15 , 22, 23 ). Phallus dark brown and curved with a distal acuminate process ( Figs. 8 , 16 , 24 , 38 , 45 ) on phallotheca; dorsal side minutely crenulated on basal half ( Figs. 8 , 16 , 24 ). Vesica convex and convergent in ventral view, rounded in lateral view usually with a triangular less sclerotized process directed ventrally ( Figs. 8 , 16 , 28 , 38 , 45 ). Ductus seminis distalis short not surpassing the limits of vesica.

Figures

FIGURES 52 – 58. Dorsal view of the species of Ascra. 52 — A. bifida; 53 — A. cordifera; 54 — A. championi; 55 — A. petersii; 56 — A. abdita; 57 — A. flavoscutellata; 58 — A. vluteum. (Scale = 5 mm).

FIGURES 59 – 65. Ventral view of the species of Ascra. 59 — A. bifida; 60 — A. cordifera; 61 — A. championi; 62 — A. petersii; 63 — A. abdita; 64 — A. flavoscutellata; 65 — A. vluteum. (Scale = 5 mm).

FIGURES 1 − 8. Ascra bifida (Say, 1832). 1 – 2 Metasternal process; 1 — ventral view; 2 — lateral view. 3 — Female, genital internal. 4 — Female, genital plates. 5 − 7 Male, pygophore; 5 — dorsal view; 6 — ventral view; 7 — posterior view. 8 — Phallus. (aaf—anterior anular flanges; ch— chitinellipsen; cs— capsula seminalis; dre— ductu receptaculi; dr—dorsal rim; gc 8 — gonocoxites 8; gc 9 — gonocoxite 9; la 8, laterotergites 8; la 9 — laterotergites 9; pa—paramere; paf—posterior anular flanges; pc—processes of capsula seminalis; pha— Phallus; pi— pars intermedialis; pla—posterolateral angle; pph—process of Phallus; pvr—projections ventral rim; sp—superior process; tiv—thickening of vaginal intima; vs—vesica; vr—ventral rim; VII—tergite VII; X (female) — abdominal segment X; X (male) — Proctiger. (Scale = 1 mm).

FIGURES 9 – 16. Ascra cordifera Walker, 1868. 9 – 10 Metasternal process; 9 — ventral view; 10 — lateral view. 11 — Female, genital internal. 12 — Female, genital plates. 13 – 15 Male, pygophore; 13 — dorsal view; 14 — ventral view; 15 — posterior view. 16 – Phallus. (Scale = 1 mm).

FIGURES 39 – 45. Ascra flavoscutellata n. sp. 39 – 40 Metasternal process; 39 — ventral view; 40 — lateral view. 41 — Female, genital plates. 42 – 44 Male, pygophore; 42 — dorsal view; 43 — ventral view; 44 — posterior view. 45 — Phallus. (Scale = 1 mm).

FIGURES 46 – 51. Ascra vluteum n. sp. 46 – 47 Metasternal process; 46 — ventral view; 47 — lateral view. 48 — Female, genital plates. 49 – 51 Male, pygophore; 49 — dorsal view; 50 — ventral view; 51 — posterior view. (Scale = 1 mm).

FIGURES 17 – 24. Ascra championi Distant, 1881. 17 – 18 Metasternal process; 17 — ventral view; 18 — lateral view. 19 — Female, genital internal. 20 — Female, genital plates. 21 – 23 Male, pygophore; 21 — dorsal view; 22 — ventral view; 23 — posterior view. 24 − Phallus. (Scale = 1 mm).

FIGURES 25 – 30. Ascra petersii Distant, 1881. 25 – 26 Metasternal process; 25 — ventral view; 26 — lateral view. 27 — Female, genital plates. 28 – 30 Male, pygophore; 28 — dorsal view; 29 — ventral view; 30 — posterior view. (Scale = 1 mm).

FIGURES 31 – 38. Ascra abdita Distant, 1890. 31 – 32 Metasternal process; 31 — ventral view; 32 — lateral view. 33 — Female, genital internal. 34 — Female, genital plates. 35 – 37 Male, pygophore; 35 — dorsal view; 36 — ventral view; 37 — posterior view. 38 — Phallus. (Scale = 1 mm).