Chinavia obstinata (Stål), Stal

Genevcius, Bruno C., Grazia, Jocelia & Schwertner, Cristiano F., 2012, Cladistic analysis and revision of the obstinata group, genus Chinavia Orian (Hemiptera: Pentatomidae), Zootaxa 3434, pp. 1-30 : 26-27

Chinavia obstinata (Stål)

( Figs. 1 , 2 , 9c , 17a , 23b , 24a , 25a and 28 ; Tables 1 , 2 and 4 )

Rhaphigaster obstinatus Stål, 1860: 23 ; Walker, 1867: 360.

Nezara obstinata ; Stål, 1872: 42; Lethierry & Severin, 1893: 166.

Nezara (Acrosternum) obstinata ; Kirkaldy, 1909: 120.

Acrosternum (Chinavia) obstinatum ; Rolston, 1983: 105, 116; Frey-da-Silva & Grazia, 2001: 113. Acrosternum (Chinavia) panizzii Frey-da-Silva & Grazia, 2001: 113, 115–117 (syn. by Schwertner & Grazia, 2007). Acrosternum obstinatum ; Matesco et al., 2003: 82 -88.

Chinavia obstinata ; Schwertner & Grazia, 2006: 243; 2007: 430–431.

Diagnosis. The species can be distinguished from C. difficilis and C. napaea by the medial spine of third urosternite always surpassing mesocoxae, spiracles usually light in color and gonocoxites 8 moderately convex ( Fig. 25a ). Also, black spots may be present on pronotum cicatrices, basal angles of scutellum, and on posterolateral angles of connexivum ( Fig. 28 ). As in C. difficilis , the coloration of antennae is entirely green, while black in C. napaea .

Coloration. Lateral margins of urosternites entirely green, without a thin yellowish longitudinal band. Cicatrices, basal angles of scutellum, and posterolateral angles of connexivum sometimes with black spots present. Head. Margins of juga with a moderate concavity in front of eyes, apex of head semicircular. Proportion of antennal segments: I<II<III<IV≈V. Rostrum always reaching mesocoxae. Proportion of rostrum segments: I≈II>III>IV.

Thorax. Anterolateral margins of pronotum without submarginal dorsal depression. Humeral angles obtuse. Sutural membrane slightly curved.

Abdomen. Medial spine of third urosternite reaching and sometimes surpassing mesocoxae. Spiracles usually light but sometimes black.

Male genitalia ( Fig. 23b and 24a ). Posterolateral angles of pygophore well projected beyond the posterior margin of segment X, truncate; median excavation of the ventral rim strongly concave. Genital cup strongly excavated. Flaps of ventral rim strongly folded over the genital cup, surface of flaps with a median concavity.

Female genitalia ( Fig. 25a ). Gonocoxites 8 slighlty convex, with a submarginal depression along the sutural and posterior margins. Pars intermedialis with parallel lateral margins; diameter of capsula seminalis four times the diameter of pars intermedialis. Processes of capsula seminalis with different lengths: the longer process five times the length of pars intermedialis and twice the length of the shorter. Longer process of the capsula seminalis twisted. Distribution. Brazil: Minas Gerais, Rio de Janeiro, São Paulo, Paraná, Santa Catarina and Rio Grande do Sul.

Material examined. Raphigaster obstinatus Stål, 1860 , lectotype: BRASIL: F. Sahlb. (♂, NRM) ; Acrosternum panizzii Frey-da-Silva & Grazia, 2001, holotype: BRASIL: PR, Curitiba, 17.IV.1975, A.R. Panizzi col, em Passiflora sp. (♂, DZRS).

Additional material. BRAZIL: Minas Gerais, Mata da Prefeitura, Corrego Paraiso , 6.nov.1985, T.J. Henry and S.P. Fiuza colls. (1♀, NMNH); Vila Ideal , Juiz de Fora, MG, 30.I.1975, 0 2808 (1♀, FIOC); Vila Ideal , Juiz de Fora, MG, 30.I.1975, 0 2809 (1♀, FIOC); Vila Ideal , Juiz de Fora, RJ, 30.I.1975, 0 28010 (13, FIOC); São Bento, D. Caxias, Est. do Rio de Janeiro , VI.1953, C.A.C. Seabra (131♀, MNRJ); Rio de Janeiro, Acc. 2966, oct. (1♀, NMNH); Rio de Janeiro, Acc. 586 and 315 (2♀♀, NMNH); Rio de Janeiro, 1916, Olavo Lerne (1♀, MNRJ); Rio de Janeiro, 7.XII.1989 (1♀, MNHN); Campinas , SP, 4.XI.1975 (1♀, DZRS); Campinas, SP, 16.III.1976, B. Pregnolatto col. (1♀, DZRS); Campinas, SP, 11.XI.1976, L. Medeiros col. (13, DZRS); Campinas, SP, III.1979, C.T. Teradeira (1♀, ZUEC); Campinas, SP, 13. IV.1982, Pereira Luiz Tadeu (1♀, DZRS); Ubatuba, SP, BR, 23.X.1976, B.C. Lopes col. (131♀, DZRS); Caraguatatuba, SP, Res. Flo ., 40m, 2.IV.1962, Martin Reichart & Silva (132♀♀, DZRS); Ilha de Buzios , SP, 16.X-4XI.1963 (1♀); Ibirapuera , São Paulo, SP, Brasil, 7.IX.1981, M. Balog (1♀, DZRS); Rio Nov., PR Uhler collection (8331♀, NMNH); Rio Iguaçu , PR, VII.1992, Skuk, G. (1♀, DZRS); Corupá , SC, Hansa Huboldt, Brazil, XII.1944, A. Maller col., Frank Johnson donor (1♀, AMNH); Nova Teutônia (SC), 27°11’B52°23’L, Fritz Plaumann, 300- 500m, II.27.1948 (13, AMNH); Nova Teutônia (SC), 27°11’B52°23’L, Fritz Plaumann, 300- 500m, VII.1948 (3♀♀, AMNH); Nova Teutônia (SC), 27°11’B52°23’L, Fritz Plaumann, 300- 500m, 27.VII.1948 (131♀, AMNH); Nova Teutônia (SC), 27°11’B52°23’L, Fritz Plaumann , 300- 500m, IX.23.1948 (1♀, NMNH); Nova Teutônia ( SC), 27°11’B52°23’L, Fritz Plaumann, 300- 500m, IX.17.1950 (1♀, NMNH); Nova Teutônia (SC), 27°11’B52°23’L, Fritz Plaumann, 300- 500m, III.6.1951; Nova Teutônia ( SC), 27°11’B52°23’L, Fritz Plaumann, 300- 500m, I.12.1957 (13, NMNH); Nova Teutônia ( SC), 27°11’B52°23’L, Fritz Plaumann, 300- 500m, XI.20.1959 (2♀♀, AMNH); Nova Teutônia ( SC), 27°11’B52°23’L, Fritz Plaumann, 300- 500m, VII.1970 (131♀, NMNH); Criciuma, SC, 24.II.2003, Remus, G. (13, DZRS); Criciuma, SC, 16.III.2003, Remus, G. (1♀, DZRS); Criciuma, SC, 22.IX.2003, Remus, G. (1♀); Criciuma, SC, 1.VI.2004 (13, DZRS); Criciuma, SC, 3.IX.2004, Gonçalves, J. (1♀, DZRS); Criciuma, SC, 23.VIII.2006, Teixeira, R.A. (1♀, DZRS); Criciuma, SC, 5.XII.2006, Ramos, T.C. (1♀, DZRS); Criciuma, SC, 12.II.2007, Remus, G. (1♀); Criciuma, SC, 27.II.2007, Behs, D. (1♀, DZRS); Criciuma, SC, VIII.2007, Bianchi, F.M. (1♀, DZRS); Criciuma, SC, 11.IX.2007, Bianchi, F.M. (13, DZRS); Criciuma, SC, 27.IX.2007, Marcarini (1♀, DZRS); Içara, SC, 10.I.2006, Stone, J (2♀♀, DZRS); Içara, SC, 6.II.2006, Martins, F (131♀, DZRS); Içara, SC, 11.II.2006, Stone, J (1♀, DZRS); Içara, SC, 22.II.2006, Stone, J (1♀, DZRS); Içara, SC, 25.II.2006, Stone, J (1♀, DZRS); Içara, SC, 15.III.2006, Stone, J (1♀, DZRS); Içara, SC, 19.IX.2006, Stone, J (1♀, DZRS); Içara, SC, 7.III.2007, Martins, F (1♀, DZRS); Içara, SC, 31.III.2008, Alberton (1♀, DZRS); Montenegro, RS, 01.XII.1977, T. Arigony leg. (131♀, DZRS); São Leopoldo, RS, 16.XII.1989, A. Mohr (1♀, DZRS); Rio Grande do Sul, Estrela, II.2000, Schwertner col., in Passiflora edulis (13, DZRS); Estrela, RS, 12.I.2002, em Passiflora edulis, Schwertner col. (3332♀♀, DZRS); Estrela, RS, II.2002, Schwertner col., (33310♀♀, DZRS); Porto Alegre, RS, 13.VIII.1956 (13, MGAP); Porto Alegre, RS, 30.X.1956 (13, MGAP); Porto Alegre, RS, 24.VIII.1982, G. Moreira, em laranjeira (131♀, DZRS); Porto Alegre, RS, B. Higienópolis, 7.III.1993, J. Grazia (13, DZRS); Porto Alegre, RS, XI.1994, Fernandes J.A.M. (13, DZRS); Porto Alegre, RS, II.1995, Fernandes J.A.M. (13, DZRS); Porto Alegre, RS, XI.1995, Fernandes J.A.M. (13, DZRS); Porto Alegre, RS, X.2000, Fernandes J.A.M. (13, DZRS); Porto Alegre, RS, 14.II.2001, Matesco, V. (13, DZRS); Bairro Assunção , Porto Alegre, RS, 14.II.2001, Matesco col. (13, DZRS); Morro do Osso , Porto Alegre, RS, XII.2001, Fernandes J.A.M. col (13, DZRS); Viamao, RS, 17.II.2007, J.C. Bernardes (13, DZRS); Pelotas, RS, 13.XI.1982, C.V. Gastal leg. (1♀, DZRS); Pelotas, RS, 20.III.2001, L.M. Vivian (3332♀♀, DZRS); Estação Ecologica Taim , RS, 17.III.1982, J. Grazia (333, DZRS); no data: 2334♀♀ ( NMNH).

Figures

FIGURE 1. Distribution of obstinata group. Green, Chinavia difficilis; red, C. obstinata; yellow, C. napaea. Dark gray, Brazilian Atlantic Forest; light gray, Pampa biome.

FIGURE 2. Polymorphism of dorsal black spots on Chinavia obstinata: C. obstinata 1 (a), with black spots on the internal margins of the cicatrices of pronotum (cp), scutellum basal angles (sba) and posterior margins of connexival segment (pmc); C. obstinata 2 (b), with black spots on the scutellum basal angles and posterior margins of connexivum; C. obstinata 3 (c), with black spots on the internal margins of the cicatrices of pronotum and posterior margins of connexivum; C. obstinata 4 (d), without dorsal black spots.

FIGURE 9. Abdominal spine (as): reduced in C. laeta (a), reaching hind coxae in C. marginata (b), surpassing mesocoxae in C. obstinata (c).

FIGURE 17. Blackened lateral margin (bm) of the flaps of the ventral rim of the pygophore: restricted to the inner part of the flap in C. obstinata (a), extending to the pygophore posterolateral angles in C. australe (b). Apex of the flaps of the ventral rim of the pygophore developed in a hook-like projection (hlp) in C. obstinata (a).

FIGURE 23. Ventral view of pygophore: C. difficilis (a), C. obstinata (b), showing flaps (fl) and genital cup (gc).

FIGURE 24. Posterior view of pygophores: C. obstinata (a) and C. difficilis (b), showing “V-shaped” median excavation (me).

FIGURE 25. Ventral view of female genitalia: C. obstinata (a), C. difficilis (b) and C. napaea (c), showing gonocoxites 8 and 9 (gc8 and gc9), laterotergites 8 and 9 (la8 and la9), segment X (X), sutural angles (sa) and excavations (ex) on the posterior margins of gonocoxites 8 of C. napaea (c).

FIGURE 28. Dorsal and ventral view of C. obstinata (Holotype of Acrosternum panizzii, ♂).