Edessa (Edessa) truncatiacantha, Mendonça & Silva & Fernandes, 2023

Mendonça, Maria Thayane Da Silva, Silva, Valéria Juliete Da & Fernandes, José Antônio Marin, 2023, Description of fifty-one new species and new taxonomic arrangement for the E. sexdens group of the subgenus Edessa (Heteroptera, Pentatomidae, Edessinae, Edessa), Zootaxa 5372 (1), pp. 1-128 : 98

Edessa (Edessa) truncatiacantha sp. n.

( Figs. 48 , 69 E–F , 72 )

Etymology. The name refers to the truncated humeral angles (L. truncatus, cut off; L. canthus, corner).

Material examined. Holotype male. GUIANA, Essequibo : Montanha Kanuku and Timerhi, I-1985, C. Feuillet ( USNM).

Paratype. GUIANA, Essequibo: 1♀, same data as holotype ( DAR) .

Measurements (n= 2). Total length: 16.8–19.7; head length: 1.7–1.8; head width: 3.4–3.5; pronotum length: 2.7–3.8; pronotum width: 13.3–14.0; scutellum length: 8.4–8.6; scutellum width: 6.5–6.8; abdominal width: 10.1– 11.0; length antennomeres: I: 1.0; II: 1.5; III: 2.0–2.3; IV: 4.2–4.4; V: 4.7–5.0.

Diagnosis. Large (16.8–19.7 mm). Dorsal body surface green ( Fig. 69 E ). Ventral surface dark yellow to greenish yellow with transversal black bands on thorax and abdomen ( Fig. 69 F ). Antennae reddish brown ( Fig. 69 E–F ). Pronotum with brown punctures; anterolateral margin and cicatrices with black punctures ( Fig. 69 E ). Humeral angles short (1.3 times wider than long); apex with black spot expanding over the pronotal disc in dorsal view and restricted to the angles in ventral view; bent backward ( Fig. 69 E–F ). Scutellum with brown punctures; posterior part excavated medially; apex not reaching the end of coria ( Fig. 69 E ). Coria with all veins concolorous with the surrounding surface ( Fig. 69 E ). Connexival segments without spot and flat ( Fig. 69 E ). Posterolateral angles of connexivum with apices black ( Fig. 69 E ). Ventral surface, thorax with black bands; dark band of the propleura almost reaching the dark spot of the humeral angles ( Fig. 69 F ). Proepisternum with dark band ( Fig. 69 F ). Evaporatorium concolorous with the surrounding surface; peritreme straight ( Fig. 69 F ). Metasternal process ( Figs. 48 G ; 69 F ) with arms of anterior bifurcation straight and laterally barely expanded at apex; anterior bifurcation slightly excavated receiving fourth rostral segment. Legs brown ( Fig. 69 F ). Abdomen with spine of segment III rounded ( Fig. 48 G ). Intersegmental areas covered by wide solid black bands with well-defined margins, not reaching lateral margin ( Fig. 69 F ). Pseudosutures solid black with well-defined margins ( Fig. 69 F ). Median longitudinal black band incomplete ( Fig. 69 F ). Trichobothria one in line with spiracle and the other laterad. Posterolateral angles of segment VII not reaching the level of apices of laterotergites IX ( Fig. 48 F ). Male genitalia, dorsal side of the pygophore with a suffused dark brown area occupying 1/3 of the surface ( Fig. 48 A–B ). Posterolateral angles of the pygophore developed, projected laterally, apices with spot black ( Fig. 48 A–B, E ). Superior processes of the genital cup rectangular, thick, in flattened and coarse posterior view, continuing ventrally in a crenulate high carina, ending in a small dentiform projection ( Fig. 48 B, D–E crenulate carina and dentiform projection barely visible). Diaphragm with reddish spots ( Fig. 48 C–D ). Parameres ( Fig. 48 D–E ) with brown margins; anterior lobe subrectangular; dorsal lobe rounded with curved apex; posterior lobe subrectangular. Proctiger, posterior face subelliptical ( Fig. 48 D–E ). Ventral surface with lateral dark spots ( Fig. 48 C ). Ventral rim not setose ( Fig. 48 C ); with expansions little developed, rounded, concolorous with the surrounding surface ( Fig. 48 C ). Female genitalia, valvifers VIII with concolorous with the surrounding surface punctures; sutural margins contiguous and not divergent; posterior margins with open V-shaped excavation, sinuous; with brown spot in tumescence. Laterotergites VIII with dark band on lateral margins. Laterotergites IX with apices acuminate passing the mediotergite VIII ( Fig. 48 F ).

Comments. See comments on E. (E.) redunca sp. n.. Edessa (E.) truncatiacantha sp. n. differs from E. (E.) redunca sp. n., E. (E.) sphaerocornis sp. n., and E. (E.) ventrocarinata sp. n. by the dark band of the propleura almost reaching the dark spot of the humeral angles (the other species with dark band of the propleura covering 1/3 or 2/3 of the width of the sclerite); proepisternum with dark band (the other species without); and pygophore with superior processes of the genital cup carina with dentiform projection (the other species without dentiform projection).

Distribution ( Fig. 72 ). GUIANA: Essequibo.

Figures

FIGURE 48. A–G. Edessa (E.) truncatiacantha sp. n.: A–E, pygophore in dorsal, dorsolateral, ventral, posterior and posterolateral views, respectively; F, genital plates; G, metasternal process. Scale= 1 mm.

FIGURE 69. A–F. Dorsal and ventral surface: A–B, Edessa (E.) sphaerocornis sp. n.; C–D, Edessa (E.) tenuivittata sp. n.; E–F, Edessa (E.) truncatiacantha sp. n. Scale= 5 mm.

FIGURE 72. Distribution map of the species.