Edessa (Edessa) nigroacantha, 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 : 72

Edessa (Edessa) nigroacantha sp. n.

( Figs. 34 , 65 A–B , 72 )

Etymology. The name refers to the black humeral angles (L. nigro, black; L. canthus, corner).

Material examined. Holotype male. BOLIVIA, La Paz: Tumupasa, Mulford BioExpl , XII-1921 –1922, W. M. Manm ( USNM).

Measurements (n= 1). Total length: 19.8; head length: 1.8; head width: 3.7; pronotum length: 4.1; pronotum width: 13.6; scutellum length: 9.4; scutellum width: 7.0; abdominal width: 12.2; length antennomeres: I: 1.0; II: 1.9; III: 2.2; IV: 4.4.

Diagnosis. Large (19.8 mm). Dorsal body surface green, densely punctured ( Fig. 65 A ). Ventral surface dark yellow with transversal black lines on thorax and abdomen ( Fig. 65 B ). Antennae, with first segment yellow, second and thrid reddish brown and fourth yellow ( Fig. 65 A–B ). Pronotum coarse, with concolorous with the surrounding surface punctures ( Fig. 65 A ). Humeral angles short (1.25 times wider than long); apex with black spot restricted to the angles in dorsal view and restricted to the margin of the angles in ventral view; bent backward ( Fig. 65 A–B ). Scutellum with concolorous with the surrounding surface punctures; apex not reaching the end of coria ( Fig. 65 A ). Coria with all veins concolorous with the surrounding surface ( Fig. 65 A ). Connexival segments with concavities almost entirely covered by subrectangular black spots separated by a large yellow median spot ( Fig. 65 A ), spots extending ventrally, triangular ( Fig. 65 B ). Posterolateral angles of connexivum with apices black ( Fig. 65 A ). Ventral surface, thorax with brown lines; dark line of the propleura covering 2/3 of the width of the sclerite ( Fig. 65 B ). Evaporatorium concolorous with the surrounding surface ( Fig. 65 B ). Metasternal process ( Fig. 34 F ) with arms of anterior bifurcation straight and laterally well expanded at apex; anterior bifurcation broadly excavated receiving fourth rostral segment. Legs with tibiae and tarsi reddish, remaining yellow ( Fig. 65 B ). Abdomen with spine of segment III rounded ( Fig. 65 B ). Intersegmental areas covered by very narrow black lines with well-defined margins, reaching the lateral spots ( Fig. 65 B ). Pseudosutures concolorous with the surrounding surface ( Fig. 65 B , dark lines are a deterioration of the exoskeleton). Median longitudinal brown band incomplete, restricted to the segment VII ( Fig. 65 B ). Trichobothria both parallel to the spiracle. Male genitalia, posterolateral angles of pygophore very developed, well projected laterally, apices with spots black ( Fig. 34 A–B, D ). Superior processes of the genital cup subtriangular, narrow, continuing ventrally in a smooth high carina, ending in a dentiform projection ( Fig. 34 B, E , dentiform projection barely visible). Diaphragm with contrasting yellow spot ( Fig. 34 D–E ). Parameres ( Fig. 34 D–E ) with black margins; anterior lobe subrectangular; dorsal lobe rounded with very curved apex; posterior lobe subrectangular. Proctiger, posterior face triangular ( Fig. 34 D–E ). Ventral surface sparsely punctuated ( Fig. 34 C ). Ventral rim setose, with medial tuft ( Fig. 34 C ); with expansions little developed, rounded, concolorous with the surrounding surface ( Fig. 34 A–C ). Female genitalia. Unknown.

Comments. Edessa (E.) nigroacantha sp. n. resembles E. (E.) omopalla sp. n. due to humeral angles black, globose and curved; connexival segments black with subrectangular spots; abdomen ventrally with intersegmental areas brown reaching the lateral spots; and the shape of superior processes of the genital cup. On the other hand, both species can be easily separated by the pygophore, the superior processes of the genital cup with smooth carina ending in a dentiform projection ( E. (E.) omopalla sp. n. with crenulate carina without dentiform projection); diaphragm with contrasting yellow spot ( E. (E.) omopalla sp. n. without spot) and ventral rim with lateral subdistal tuft of setae ( E. (E.) omopalla sp. n. without tuft of setae).

Distribution ( Fig. 72 ). BOLIVIA: La Paz.

Figures

FIGURE 34. A–F. Edessa (E.) nigroacantha sp. n.: A–E, pygophore in dorsal, dorsolateral, ventral, posterior and posterolateral views, respectively; F, metasternal process. Scale= 1 mm.

FIGURE 65. A–F. Dorsal and ventral surface: A–B, Edessa (E.) nigroacantha sp. n.; C–D, Edessa (E.) nigroantennata sp. n.; E–F, Edessa (E.) nigrocrocata sp. n. Scale= 5 mm.

FIGURE 72. Distribution map of the species.