Grammedessa acalyptoprocta 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 : 224-225

Grammedessa acalyptoprocta Da Silva & Fernandes sp.n.

( Figs. 1M–N ; 8A–C )

Diagnosis. Length 19.7 mm. Width 13 mm. Body green with tiny yellow speckles; beneath abdomen with a medial yellow large spot. Densely punctured, punctures brown ( Fig. 1M ). Bucculae punctured, some punctures dark. Humeral angles projection developed, dentiform, ventrally punctured ( Fig. 1N ). Hypocostal ridge green with yellow speckles and brown punctures. Beneath thorax densely punctured, punctures coarse and brown; abdomen shagreen and sparsely punctured, punctures small and concolorous with the background ( Fig. 1N ). First three and base of fourth antennal segments with dense, small dark spots. Legs with dense dark spots. Dorsal rim of pygophore with small rounded projections above superior processes of the genital cup ( Fig. 8A ); ventral rim more excavated than dorsal rim leaving anal opening completely exposed ( Fig. 8A–B ).

Description. Head wider than long (1.5 times). Thorax: pronotum wider than long (3 times); cicatrices with a row of concolorous punctures, delimited by groove and punctures. Evaporatorium dull, whitish, not punctured, shagreen; lateral areas coarsely punctured, not spotted, half-moon shaped ( Fig. 1N ). Metasternal process yellow; anterior bifurcation with arms abruptly acuminate; not spotted ( Fig. 1N ). Abdomen: connexivum densely punctuated, punctures green; segments III–VI medially with a callus; segment VII with distal margin and a few distal punctures black. Beneath both trichobothria lateral to spiracles.

Male ( Fig. 8A–C ). Pygophore yellow, trapezoidal (1.1 times). Dorsal rim sinuous and slightly projected over the genital cup ( Fig. 8A ). Posterolateral angles strongly developed, shallowly concave; inner part with a large brown spot and outlined by a narrow dark stripe ( Fig. 8 A–B ). Superior processes of the genital cup elliptic, projected dorsally passing dorsal rim ( Fig. 8C ). Parameres posteriorly carinated; anterior lobe developed and subtriangular; posterior lobe short and triangular ( Fig. 8C ). Proctiger brown, elongated (1.3 times); medial carina of the posterior surface bifurcated on distal half ( Fig. 8A–B ). Ventral rim widely opened, strongly excavated, more than dorsal rim ( Fig. 8A ); expansions developed, tumid, close to posterolateral angles ( Fig. 8A–C ); curved inwards, densely punctured, black.Ventral surface densely punctured close to the ventral rim, punctures of different sizes, concolorous to black, a few on brown spots ( Fig. 8B ).

Etymology. Named by its exposed anal opening caused by an extremely excavated ventral rim. From the Greek. Akalyptos (uncovered) and Proktos (anus, hinder parts).

Comments. Resemble G. brunneotarsata by its non-spotted tegument and shape of parameres; but can be differentiated by its spotted outer faces of the bucculae, trichobothria lateral to spiracles, and the upper half of posterior face of pygophore with keel medially sulcate.

Examined material ( n=1). Holotype: BRAZIL: Maranhão.[REBIO-Res.Biol.Gurupi, 03°14’01”S / 46°40’52”W, 03–07.V.2011, M.M. Abreu & J.A. Silva Cols] (1Male-MPEG).

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