Grammedessa graciligramma Da Silva & Fernandes, 2022

Silva, Paulo Augusto Lima Da & Fernandes, José Antônio Marin, 2022, Description of six new species to Grammedessa Correia & Fernandes, 2016 (Heteroptera: Pentatomidae: Edessinae), Zootaxa 5129 (2), pp. 211-226 : 220-222

Grammedessa graciligramma Da Silva & Fernandes sp.n.

( Figs. 1I–J ; 6A–D )

Diagnosis. Length 14.7 mm. Width 9.5 mm. Yellow on pronotal disc and dark yellow on posterior margin of the pronotum, scutellum, and corium ( Fig. 1I ); beneath uniformly yellow. Pronotal disc with punctures concolorous; posterior margin with a band of black punctures ( Fig. 1I ). Scutellum with black punctures on black, small, isolated spots. Humeral angles projection short, dentiform ( Fig. 1I ). Anterior half of the costal margin of corium with punctures on large black spots ( Fig. 1I ); hypocostal ridge with few, black, small spots. Connexival segment VII with inner and posterior margin, and punctures black. Genital cup of the pygophore deeply excavated near the ventral rim ( Fig. 6A ). Parameres short and triangular ( Fig. 6C ). Valvifers 8 with distal margin sinuous ending in a sharp spine ( Fig. 6D ).

Description. Head wider than long (1.4 times), black stripes thinner than in other species ( Fig. 1I ). Antennal segments I–III with tiny black spots. Thorax: Pronotum wider than long (3 times); cicatrices delimited by grooves, weakly punctuated. Evaporatorium concolorous, dull, and smooth; lateral areas oval and punctured, not spotted ( Fig. 1J ). Metasternal process green; anterior bifurcation with arms strongly acuminate; not spotted. Abdomen: connexivum weakly punctuated; segments III–VI medially with a barely visible callus. One trichobothrium in line and other lateral to spiracles.

Male ( Fig. 6A–C ). Pygophore dark yellow, elongated (1.1 times), dorsal rim slightly projected over the genital cup. Posterolateral angles developed, inner margin black ( Fig. 6A ). Genital cup with large excavation, distal margin of the excavation (inner side of the ventral rim) black. Superior processes of the genital cup elliptic, touching dorsal rim. Parameres with anterior lobe triangular, posterior angle acute but not developed ( Fig. 6C ). Proctiger concolorous, elongated (1.5 times); carina of the posterior surface restricted to basal half ( Fig. 6C ). Ventral rim excavation rounded, widely opened; expansions small, tumid and rounded almost fused with posterolateral angles ( Fig. 6B ). Ventral surface weakly convex beneath posterolateral angles; densely punctured with punctures of different sizes, concolorous to black ( Fig. 6B ).

Female ( Fig. 6D ). Valvifers 8 as long as wide, level with the distal margin of valvifer 9; not spotted. Valvulae 8 carinate, slightly visible between valvifers 8. Valvifer 9 longer than wide (1.4 times), laterals partially covered by valvifers 8. Laterotergites 8 longer than wide (1.5 times) distal spine exceeding laterotergites 9; only with few dark spots. Laterotergites 9 long, narrow, slightly curved, distally with a black spine; exceeding the band uniting the laterotergites 8, exceeding the level of segment VII.

Etymology. Named for the head thin stripes, formed by punctation and sparse spots. From the Latin. Gracilis (thin) and Gramma (stripes).

Comments. The specimens studied here were kept in alcohol and lost most of their original color. Probably this species has the same color pattern found in G. fundicava sp.n. The size of the excavation of the genital cup, shape of the parameres, and distal margin of valvifers 8 sinuous, separate G. graciligramma sp.n. from the other species of the genus.

Examined material (n=4). Holotype: BRAZIL: Maranhão. [São Luís, AL 38-9583, 05.X.1984, A. Brisolla col.] (1Male-IBSP) . Paratypes: BRAZIL: Maranhão. idem holotype, but [AL 38-4718, 28.VIII.1984] (1Female-IBSP). idem holotype, but; [19. VI.84] (1Male /1Female-UFRG) .

Distribution. BRAZIL: Maranhão.

Figures

FIGURE 1. Grammedessa. A–B: G. hamata comb.n. A: Dorsal view. B: Ventral view. C–D: G. nigricava sp.n. C: Dorsal view. D: Ventral view. E–F: G. longispina sp.n. E: Dorsal view. F: Ventral view. G–H: G. fundicava sp.n. G: Dorsal view. H: Ventral view. I–J: G. graciligramma sp.n. I: Dorsal view. J: Ventral view. K–L: G. stichtocephala sp.n. K: Dorsal view. L: Ventral view. M–N: G. acalyptoprocta sp.n. M: Dorsal view. N: Ventral view. Scale = 10 mm.

FIGURE 6. Genitalia of G. graciligramma sp.n. A–C: Male genitalia. A: Pygophore in dorsal view. B: Pygophore in ventral view. C: Pygophore in posterior view. D: Female genital plates in ventral view. Scale = 1 mm.