Chinavia nigritarsis (Stål), Stal

Genevcius, Bruno C. & Schwertner, Cristiano F., 2014, Review and phylogeny of the geniculata group, genus Chinavia (Heteroptera: Pentatomidae), with notes on biogeography and morphological evolution, Zootaxa 3847 (1), pp. 33-56 : 49

Chinavia nigritarsis (Stål)

( Figs. 4 f, 5f; table 3)

Nezara nigritarsis Stål 1972 , 40; Lethierry & Severin 1893, 166; Breddin 1906, 193. Nezara (Nezara) nigritarsis: Kirkaldy 1909 , 116.

Chinavia nigritarsis: Schwertner & Grazia 2007 , 422, 430.

Diagnosis. External margins of juga, pronotum, scutellum and hemelytra with dark yellow bands. Antennae, femora and tibia black.

Head. Margins of juga with a strong concavity in front of eyes; apex of head oval in shape. Antennae, most of rostrum and at least apex of femora black. Proportion of antennal segments: I<II<III<IV≈V. Rostrum surpassing the metacoxae. Apex of tylus with a wide black spot.

Thorax. Humeral angles rounded, not produced. Anterolateral margins of pronotum with a slight submarginal dorsal depression. Black spots absent on the cicatrices of pronotum and external margins of propleura. Basal angles of scutellum immaculate. Membrane of hemelytra darkened.

Abdomen. Abdominal spine reaching metacoxae; spiracles concolorous with the body and without a callus. Connexivum without black spots at the anterior and posterior margins.

Male genitalia ( Fig. 5 f). Pygophore subtrapezoidal, with posterolateral angles projected well beyond the ventral rim. Lateral margins of pygophore rounded. Median projection of dorsal rim convex. Flaps of pygophore ventral rim folded over the genital cup with the mesial margins straight; apex of flaps without a curved hook-like projection. Segment X dorsally convex. Parameres projected anteroposteriorly with the apices black.

Female genitalia. Gonocoxites 8 and laterotergites 9 flattened. Posterior margins of the gonocoxites 8 straight. Gonocoxite 9 slightly concave. Pars intermedialis conical, enlarged at the apex, as long as the capsula seminalis; capsula seminalis twice the width of pars intermedialis. Anterior annular flange shorter than the posterior and slightly curved towards the vesicular area. Posterior annular flange curved towards the pars intermedialis. Processes of capsula seminalis subequal in length, six times the length of pars intermedialis.

Adult size. 13–15mm

Distribution. Brazil (AM).

Material examined. Uaupés (AM), Brazil, M Alvarenga col., NMNH (1♂); Rio Maranon, Peru, AMNH (1♀); French Guiana, E Le Moult col., MNHN (1♀).

Comments. This species was synonymized with C. gravis due to the dark green body and the general body shape ( Rolston 1983). Schwertner & Grazia (2007) re-evaluated the species status because of the absence of a yellow stripe at the median region of the scutellum and the unique pygophore.

Figures

FIGURE 4. Dorsal view of the geniculata group species. A = C. cearensis, B = C. erythrocnemis, C = C. geniculata, D = C. gravis, E = C. immaculata, F = C. nigritarsis, G = C. nigropicta, H = C. panamensis, I = C. pontagrossensis, J = C. rogenhoferi, K = C. rideri, L = C. sebastiaoi, M = C. tuiucauna, N = C. vanduzeei.

FIGURE 5. Dorsal view of the pygophores of the geniculata group species. A = C. cearensis, B = C. erythrocnemis, C = C. geniculata, D = C. gravis, E = C. immaculata, F = C. nigritarsis, G = C. pontagrossensis, H = C. rideri, I = C. sebastiaoi, J = C. vanduzeei; pa = posterolateral angle.