Chinavia Orian 1965
Creators: name: Genevcius, Bruno C.
name: Grazia, Jocelia
name: Schwertner, Cristiano F.
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Pentatomidae
Chinavia
Chinavia obstinata

description: Genus Chinavia Orian, 1965
Chinavia Orian, 1965: 25; Day, 1965: 559; Roche, 1977: 562; Ahmad, 1996: 49 –51; Schwertner, 2005: 102 –103; Schwertner & Grazia, 2007: 416.
Acrosternum pallidoconspersum -group Linnavuori, 1972: 416 –418.
Acrosternum (Chinavia); Linnavuori, 1982: 139 –143; Rolston, 1983: 102 -108; Frey-da-Silva & Grazia, 2001: 108 –113.
Obstinata group
Diagnosis. Recognized among species of Chinavia by the body coloration, including lateral margins of juga, hemelytra and connexiva, predominantly green; peritreme exceeding half the width of the evaporatorium; corium not surpassing the posterior margin of connexival segment VI; medial spine of third urosternite reaching mid-coxae and occasionally surpassing it; apex of the flaps of pygophore ventral rim with a hook-like projection.
Medium size, without differences in body length or width among species. Males: length, 11.7 ± 0.7 mm; width, 6.95 ± 0.04 mm. Females: length, 13.51 ± 0.12 mm; width, 8.2 ± 0.07 mm. Other measurements in Table 4.
Coloration. Dorsal surface ranging from light to dark green, ventral surface blending to yellow medially.
Segment I of antennae always green, segments II to V variable among species (black or green). Legs
predominantly light-green, with apex of tibiae and tarsi dark green. Hemelytral membrane hyaline.
Head. Dorsal surface of juga flat, shape of lateral margins variable among species. Rostrum always surpassing mesocoxae. Apex of scutellum obtuse.
Thorax. Anterolateral margins of pronotum slightly sinuous. Humeral angles obtuse or slightly truncate. Peritreme surpassing half the width of the evaporatorium.
Abdomen. Ventrally convex. Punctures of dorsal surface darker than the surrounding area, fine and dense; punctures of ventral surface concolorous with the surrounding area, inconspicuous and sparse. Sinuosity of posterior margin of segment VII inconspicuous, not projected over the basal angle of laterotergites 8.
Male genitalia. Pygophore subtrapezoidal (Fig. 23), with posterolateral angles projected well beyond the ventral rim. Median projection of dorsal rim convex; lateral thirds of dorsal rim slightly projected over the genital cup. Flaps of pygophore ventral rim folded over the genital cup (Fig. 23); mesial margins of flaps concave and emarginated in black, apex with a curved hook-like projection; lateral margins sinuous. Segment X dorsally convex. Parameres projected anteroposteriorly. Ventral rim of pygophore moderately convex, median excavation “V”-shaped (Fig. 24). Depression of ventral wall not well developed, but delimited by a conspicuous carina. Phallus similar to other species of Chinavia (e.g. Schwertner & Grazia, 2006; Grazia et al. 2006).
Female genitalia. Gonocoxites 8 (Fig. 25): sutural angles obtuse, sutural margins not juxtaposed, posterior margins almost straight. Gonapophyses 8 surpassing posterior margins of gonocoxites 8. Apex of laterotergites 9 obtuse, surface slightly concave, mesial margins rectilinear. Posterior margin of gonocoxites 9 concave. Spine of the posterior margin of gonapophyses 9 well developed (Fig. 25), sometimes reaching half length of the gonocoxites 9. Pars intermedialis as long as capsula seminalis (Fig. 26); posterior annular flange with diameter less than that of the anterior annular flange; anterior annular flange slightly curved toward pars intermedialis.
Distribution (Fig. 1): Brazil: Minas Gerais, Rio de Janeiro, São Paulo, Paraná, Santa Catarina and Rio Grande do Sul. In all these states, the distribution of the species are mainly restricted to Atlantic Rain Forest areas; C. obstinata also occurs in the Coastal Plain of Rio Grande do Sul, more related to the Pampa, a biome dominated by grasslands and riparian forests.
Key to the species of the obstinata group
1. Antennal segments, except segment I, black; a broad submarginal dorsal depression present along the anterolateral margins of the pronotum; gonocoxites 8 strongly convex with distinct excavation on each posterior margin (Fig. 25c); scutellum tapering at apex................................................................................. Chinavia napaea
- All antennal segments green; anterolateral margins of pronotum without submarginal dorsal depression; gonocoxites 8 not strongly convex, without excavations on the posterior margins.................................................. 2
2. Medial spine of third urosternite never surpassing mesocoxae; black spots on the connexivum always absent; posterolateral angles of the pygophore tapering at apex (Fig. 23a); median excavation of the ventral rim of the pygophore slightly concave; gonocoxites 8 flat....................................................................... Chinavia difficilis
- Medial spine of third urosternite segment reaching and sometimes surpassing mesocoxae; black spots on the posterolateral angles of all urosternites, sometimes extending to the connexivum; pygophore posterolateral angles truncate to rounded (Fig. 23b), median excavation of ventral rim of pygophore strongly concave............................. Chinavia obstinata
description: Published as part of Genevcius, Bruno C., Grazia, Jocelia & Schwertner, Cristiano F., 2012, Cladistic analysis and revision of the obstinata group, genus Chinavia Orian (Hemiptera: Pentatomidae), pp. 1-30 in Zootaxa 3434 on pages 20-22, DOI: 10.11646/zootaxa.3434.1.1, http://zenodo.org/record/213725