Grammedessa stichtocephala 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 : 222-223

Grammedessa stichtocephala Da Silva & Fernandes sp.n.

( Figs. 1K–L ; 7A–C )

Diagnosis. Length 14.7 mm. Width 9.5 mm. Dorsally dark yellow. Beneath uniformly yellow ( Fig. 1K–L ). Head with a rectangular, small, median, punctured, black maculae between ocelli ( Fig. 1K ). Pronotal disc with punctures brown; posterior margin with a band of black punctures. Scutellum with black punctures on black spots forming a few irregular lines ( Fig. 1K ). Humeral angles projection short, dentiform. Costal margin of corium densely punctured, punctures small and brown ( Fig. 1K ); hypocostal ridge with few, black, small punctures on spots. Beneath uniformly and densely punctured, except on median line; punctures brown to black, most on black spots ( Fig. 1L ). Ventral rim of the pygophore deeply excavated, almost as excavated as dorsal rim ( Fig. 7A ).

Description. Head wider than long (1.4 times). Antennal segments I–III and base of fourth spotted. Thorax: Pronotum wider than long (3.4 times); cicatrices delimited by punctures, weakly punctuated. Evaporatorium slightly darker than pleura, densely punctured, dull, and slightly shagreen; lateral areas oval and punctured ( Fig. 1L ). Metasternal process yellow; anterior bifurcation with arms strongly acuminate; with few spots posteriorly. Legs not spotted ( Fig. 1L ). Abdomen: connexivum with punctures shallow; segments III–VI with medial callus. Both trichobothria lateral to spiracles.

Male ( Fig. 7 ). Pygophore dark yellow, subtrapezoidal (1.1 times), dorsal rim slightly projected over the genital cup. Posterolateral angles strongly developed ( Fig. 7A ), shallowly concave, inner part outlined by a stripe of dark brown punctures. Superior processes of the genital cup large, subtriangular, touching the dorsal rim of the genital cup. Parameres with anterior lobe rounded, posterior lobe small and dentiform connected with a long black carina ( Fig. 7C ). Proctiger yellow, elongated (1.5 times); slightly constricted laterally; carina of the posterior surface restricted to basal half ( Fig. 7C ). Ventral rim strongly excavated, widely opened, almost level with dorsal rim ( Fig. 7A–B ); expansions indicated only by a tumid, black, densely punctured rim ( Fig. 7C ). Ventral surface densely punctured with punctures of different sizes, concolorous to black, some on brown spots ( Fig. 7B ).

Etymology. Named for the punctured black rectangular mark on the head between ocelli. From the Greek. Stiktos (punctured) and Cephalus (head).

Comments. This species probably has the same body color as G. longispina sp.n., but all specimens examined are completely yellow. This species is also known only from males that have the ventral rim of pygophore extremely excavated. This species differs from G. longispina sp.n. by the legs without large black spots.

Examined material (n=3). Holotype: FRENCH GUIANA: Régina. [Arataye region, Saut-Pararé , mission, 17.II/ 06.III.1981, M. & C. Boulard leg.] MNHN (EH) 138 (1Male-MNHN) . Paratypes: FRENCH GUIANA: Régina. [Nouragues, Saut-Pararé 4°02’N / 52°41’W, 20.II.2010, S.E.A.G. leg., coll. R. Lupoli] (1Male-RL) . SURINAME: Sipaliwini. [Itani, Carbet Lavaud, Rive Surinamienne 5°29’N / 54°10’W, Mission M. Boulard, P. Jauffret & P. Pompanon, 3–4.XII.1975] (1Male-UFRG) .

Distribution. FRENCH GUIANA: Régina. SURINAME: Sipaliwini.

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 7. Male genitalia of G. stichtocephala sp.n. A: Pygophore in dorsal view. B: Pygophore in ventral view. C: Pygophore in posterior view. Scale = 1 mm.