Opistheurista derrubadensis, Ferreira, Paulo Sérgio F. & Coelho, Lívia A., 2006

Ferreira, Paulo Sérgio F. & Coelho, Lívia A., 2006, (Heteroptera: Miridae: Mirinae), Zootaxa 1126, pp. 63-68 : 64-68

Opistheurista derrubadensis new species ( Fig. 1 and Fig. 2a )

Diagnosis. This species can be recognized by posterior sulcus of pronotal collar reaching the anterior coxal cleft ( Fig. 2a ); head red except apical half of clypeus black; pronotum uniformly red; scutellum black with central area red; and hemelytra uniformly black.

Description. Holotype, Female (measurements in millimeters) ( Fig. 1 ).

Body length 8.30.; width 3.20. Head length 0.75; width 1.46; distance between eyes 0.75; length of antennal segment I 1.35; II 2.40; III 2.15; IV 1.65; length of rostral segment I 0.75; II 0.65, III 0.40; IV 0.62. Pronotal length 1.50; width across base 2.50; length of hind femur 2.96; hind tibial length 4.28; hind tarsal length 1.00. Hemelytron length 6.64; width 1.65; cuneal length 1.20; width cross base 1.00. Scutellum length 1.10; width 1.30.

General coloration dark fuscous to black with red areas; dull. Head red; apical half of clypeus, eyes, and antennal segments black; rostrum dark brown to black posteriorly.

Pronotum uniformly red. Scutellum black with central area reddish. Hemelytra uniformly black; membrane and veins dark fuscous with small area near apex of cuneus pale. Pro ­, meso­, metasternum red, except dark spot on mesepisternum. Ostiolar peritreme light red with external margin fuscous. Legs black with hind coxae dark reddish. Abdomen red with ovipositor, first valvifer, third valvula, segments VIII and IX, and subgenital plate black to fuscous.

Head smooth, shining, declivous, vestiture consisting of dense short setae above and more dense longer setae on front and ventrally; vertex rounded posteriorly; frons vertical; clypeus prominent, projecting more anteriorly than frons; juga and lora prominent; buccula clearly delimited; eyes located posteriorly on head, close to anterior margin of prothorax. Margin of antennal socket touching eye, above juga­loral suture; antennal segment I longer than vertex width; segments linear; relative lengths of segments from shortest to longest I­IV­III­II; vestiture of segment I somewhat sparse, that of II more dense, length of longer setae not longer than diameter of segment, those of III and IV with occasional setae longer than diameter of segment. Rostrum almost reaching mid coxae, vestiture sparse, consisting of short and long setae. Pronotum smooth, dull; disc slightly convex; lateral margins rounded, posterior margin slightly concave; humeral corners rounded; calli convex, smooth, slightly shining; collar deeply delimited dorsally with lateral suture reaching cleft of fore coxae; vestiture consisting of dense and very short erect setae. Scutellum smooth, dull, slightly convex. Hemelytra smooth, dull, slightly convex at middle of posterior margin; vestiture consisting of sparse very short erect setae with scattered longer setae mainly at embolium margin and cuneus; embolium narrow; cuneus longer than wide; membrane with two cells, glabrous. Femora linear; tibiae without spines, setae as long as diameter of tibia with scattered longer setae. Setae on underside of abdomen fairly dense, longer than dorsal side.

Male: unknown

Discussion

The genus Opistheurista is very close related to genus Prepops . Both are in the same tribe Resthenini and similar in texture and appearance. Opistheurista can be distinguished from Prepops by the posterior sulcus of pronotal collar reaching the anterior coxal cleft ( Fig. 2a ), where as in Prepops it is interrupted laterally ( Fig. 2b ).

O. derrubadensis is readily distinguished from O. clandestina by the following characters:

1. Pronotum uniformly red; hemelytron totally black. Geographic distribution: Neotropical, Southern Brazil.................................................... O. derrubadensis n.sp. ( Fig.1 ) 2. Disc of pronotum dark fuscous; hemelytron with lateral margins reddish. Geographic distribution: Nearctic ............................................... O. clandestina (Van Duzee) ( Fig.3 ) Material examined. O. derrubadensis : Holotype, female, Derrubadas, RS, P.E. Turvo, 31.X. 2003, Moura. L. 27º14’09.6” S, 53º58’42.5” W. Guarda chuva entomológico. Col. MCN 175122. Deposited in Museu de Ciências Naturais (MCN) da Fundação Zoobotânica do Rio Grande do Sul, Porto Alegre, RS, Brazil. O. clandestina : female, compared with type by Carvalho, 1972, Baton Rouge Jun 30, 1935 La, T. McGregor collector; female, College Station, Tex. May 18, 1935, H.G. Johnston.

Geographic Distribution. Brazil: Rio Grande do Sul State; Derrubadas. Etymology. This species is named for its place of occurrence in Brazil. Host. Unknown; the specimen was taken with a beating net.

Figures

FIGURE 1. Opistheurista derrubadensis Female (holotype) dorsal habitus.

FIGURE 3: Opistheurista clandestina Female (holotype) dorsal habitus (redrawn from Carvalho, 1975).

FIGURE 2 a: Opistheurista derrubadensis lateral view of head and pronotum.