Edessa metallica

Fernandes, José Antônio Marin & Campos, Lourival Dias, 2011, A new group of species of Edessa Fabricius, 1803 (Hemiptera: Heteroptera: Pentatomidae), Zootaxa 3019, pp. 63-68 : 63-64

The Edessa metallica group

Diagnosis. This group is easily recognized by the metallic blue or green color of the dorsal surface and the reddish margin of the mesopleura crossing the evaporatorium; neither of these characteristics is found in any other species of Edessinae . Furthermore, the combination of short peritrema, shape of the gonocoxites 8, and the basal tumescence of the pygophore’s posterolateral angle are also diagnostic. The shape of the body, especially the humeral angles, resembles some species (e.g., E. satrapa Breddin and E. helicoceras Breddin ), but the genitalia of both sexes are completely different.

Descriptions. Body ranging from 13.9 to 17.9 millimeters long. Oblong in shape. Dorsal surface dark, metallic blue or green on part of the head, pronotum, hemelytron, and abdomen. Punctures dense and concolorous with surrounding area. Ventral surface lighter than dorsal, shiny. Legs and antennae dark brown.

Head wider than long, shiny. Juga rugulose, longer than tylus and contiguous in front of it, lateral margins reddish, sinuate and anteriorly rounded. Tylus and juga at same elevation in lateral view. Antenniferous tubercles visible from dorsal view and not armed. Second antennal segment subequal to third in length and both longer than first. Bucculae short, ventrally produced, subparallel, evanescent at posterior part of gula. Rostrum with first segment short, not or just surpassing bucculae; second segment longest but shorter than third plus fourth; fourth segment longer than first and fitting into metasternal shield.

Thorax. Pronotum dark, trapezoidal, wider than long, metallic blue or green. Punctures shallow, concolorous with pronotal disk and dense. Cicatrices calloused and concolorous with pronotal disc. Anterolateral margins mostly yellowish to reddish with a small tubercle on anterior angles, transversally rugose to humeral angles. Humeral angles strongly developed anterolaterally, metallic blue or green, slightly rugose, apex curved and truncate. Posterior margin along scutellar base shallowly concave. Propleuron densely punctured. Mesopleuron with a reddish longitudinal stripe on distal margin. Evaporatorium wrinkled, castaneous, whitish and dull, covering part of mesopleuron and part of metapleuron. Peritreme short (2–3 times longer than wide), smooth, shiny, reddish, narrowing to apex. Metasternal process smooth, shiny and slightly convex with few setae. Scutellum longer than wide, sharp posteriorly, reaching sixth abdominal segment. Corium with dark punctures densely and uniformly distributed; veins concolorous. Membrane of hemelytron dark brown with a few subparallel veins. Legs dark brown.

Abdomen. Connexivum exposed and shiny, lighter than body, reddish to light castaneous, finely and densely punctured but without maculae. Posterolateral angles with small black spines, seventh segment (VII) with posterolateral angles slightly developed especially in females. Dorsal surface of abdomen fuscous. Ventrolateral margin of abdomen concolorous with connexivum; no dark stripes on intersegmental areas, nor pseudosutures or punctures. Spiracles located in tumid areas. Trichobothria on segments III to VII close to each other, one lined up with spiracles and the other more lateral.

Male genitalia ( Figs. 4–6 ). Pygophore (pyg) subrectangular in dorsal view. Genital cup open posterodorsally ( Figs. 4–5 ). Dorsal surface of pygophore smooth but dorsal rim rough. Dorsal rim (dr) slightly projected over genital cup, partially covering genital cup process (fig. 4). Genital cup process (gp) dark, long, narrow and tumid. Posterolateral angles developed with a tumid basal area ( Figs. 4 , 10 ). Paramere (pa) with two lobes, one anteriorly directed and other laterally curved ( Fig. 5 ). Ventral rim with small lobes close to posterolateral angles; ventral surface punctured and rugose. Proctiger subcylindrical, anterior part smooth and shiny, posterior part dull and rough, slightly constricted laterally.

Female genitalia ( Fig. 1 ). Gonocoxite 8 (gc8) convex with dark punctures on distal half. Laterotergite 8 (la8) wider than long, convex, distal margin posteriorly produced in a small dark apical spine that barely surpasses level of laterotergites 9; small concolorous spiracle at basal angle; most of surface concolorous with connexivum. Gonocoxite 9 (gc9) trapezoidal and convex. Laterotergite 9 (la9) almost as wide as long, distal margin passing band dorsally uniting laterotergites 8. Segment X (x) trapezoidal and convex.

Distribution. PANAMA. COLOMBIA: Antioquia, Valle del Cauca. E CUADOR: Imbabura.

Figures

FIGURES 4 – 9, Edessa preclara sp. nov. 4 – 6, male, pygophore; 4, dorsal view; 5, posterior view; 6, ventral view. 7, female, genital plates. 8 – 9, metasternal process; 9, ventral view; 8, lateral view. (dr, dorsal rim; gp, genital cup process; pa, paramere; pyg, pygophore; vr, ventral rim; X, abdominal segment X. Scale = 1 mm).

FIGURES 10 – 15, Edessa splendens sp. nov. 10 – 12, male, pygophore; 10, dorsal view; 11, posterior view; 12, ventral view. 13, Female, genital plates. 14 – 15, Metasternal process; 15, lateral view; 16, ventral view. Scale = 1 mm.

FIGURES 1 – 3. Edessa metallica sp. nov. 1, Female, genital plates. 2 – 3, Metasternal process; 2, ventral view; 3, lateral view. (gc 8, gonocoxites 8; gc 9, gonocoxites 9; la 8, laterotergites 8; la 9, laterotergites 9; VII, urotergite VII; X, abdominal segment X. Scale = 1 mm).