Edessa (Edessa) sexdens Fabricius 1803
Creators: name: Mendonça, Maria Thayane Da Silva
name: Silva, Valéria Juliete Da
name: Fernandes, José Antônio Marin
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Pentatomidae
Edessa
Edessa sexdens

description: Edessa (E.) sexdens Fabricius, 1803
(Figs. 20, 21, 29 C,D, 30 A)
Edessa sexdens Fabricius, 1803: 148; Stål, 1868: 36; Lethierry & Severin, 1893: 194; Kirkaldy, 1909: 164.
Edessa nigromarginata Distant, 1881: 392: Kirkaldy, 1909: 161 syn. nov.
Edessa sexdens. Lectotype male. America Meridionali Smidt (ZMUC). Examined by photos. (Fig. 21 D) Paralectotypes. Same data. Two females (ZMUK) and one male (ZMUC).
Edessa nigromarginata. Lectotype female. Jamaica (NMI). Examined by photos.
Paralectotypes. Two females. same data (BMNH). Examined.
Material examined. SURINAME, Paramaribo: 1♀, Paramaribo, 13-III-1962, V. Vreder leg. (Compared to the type —Fernandes JAM, 1999) (RMNH); 1♁, Paramaribo, 26-X-1938, Geiiskes (RMNH); Marowijne: 1♁ 1♀, Galibi, 9-XI-1948 (RMNH); BRAZIL, Pará: 1♀, Mosqueiro, Belém, Gustavo Ruiz (UFPA).
Measurements (n= 4). Total length: 15.3–16.8; head length: 1.2–1.4; head width: 2.7–2.8; pronotum length: 3.0–3.2; pronotum width: 9.5–10.5; scutellum length: 7.7–8.5; scutellum width: 5.0–5.5; abdominal width: 8.1–8.7; length antennomers: I: 0.9–0.9; II: 1.0–1.0; III: 1.5–1.9; IV: 2.7–3.2; V: 3.0.
Diagnosis. Specimens large (15.3–16.8 mm). Dorsal surface olive green (Figs. 21 A, 29 C). Ventral surface dark yellow to brown with transversal black lines on thorax and abdomen (Figs. 21 B, 29 D). Antennae brown (Figs. 21 A, 29 C). Pronotum with punctures brown; anterolateral margin and cicatrices with black punctures (Figs. 21 A, 29 C). Humeral angles short (1,6 times wider than long) (Figs. 21 A, 29 C), apices concolorous with surface and not recurved (Figs. 21 A, 29 C). Scutellum with punctures brown (Figs. 21 A, 29 C); apex surpasses end of corium (Figs. 21 A, 29 C). Corium with all veins concolorous with surface (Figs. 21 A, 29 C). Posterolateral angles of connexivum with apices black (Figs. 21 A, 29 C); connexival segments with concavities almost entirely covered by rectangular black spots and separated by a large pale yellow median spot (Figs. 21 A, 29 C); spots extending ventrally, subrectangular (Figs. 21 B, 29 D). Ventral surface. Thorax with black stripes (Figs. 21 B, 29 D); dark stripe of the propleuron connected to the dark spot of the humeral angle (Fig. 21 B, 29 D). Proepisternum with dark stripe (Fig. 21 B, 29 D). Evaporatorium concolorous with thorax (Fig. 21 B, 29 D). Metasternal process (Fig. 20 G) with anterior apex straight and laterally well expanded, margin acuminated; anterior face little excavated; anterior bifurcation receiving fourth rostral segment. Legs brown (Fig. 21 B, 29 D). Abdomen with spine of third segment acuminated (Fig. 20 G). Intersegmental areas black, not reaching ventral spots of connexivum (Fig. 21 B, 29 D). Pseudosutures solid black, margin well-defined (Figs. 21 B, 29 D). Each segment with anterior and posterior white lines (Fig. 21 B). Median longitudinal dark band incomplete in varying degrees (Figs. 21 B, 29 D). Trichobotria one in line with spiracle and the other laterad. Posterolateral angles of segment VII surpass the level of apices of laterotergites IX in females (Fig. 20 F). Male genitalia, dorsal side of the pygophore with a suffused brown area occupying 1/3 of the surface (Fig. 20 A,B). Posterolateral angle of the pygophore developed (Fig. 20 A). Superior process of genital cup laminar, tumid, rectangular, thick, with a groove in posterolateral view; flattened and coarse in posterior view, continuing ventrally in a crenulated short carina (Fig. 20 B,D,E). Ventral rim with lateral subdistal tuft of setae (Fig. 21 C). Female genitalia, valvifers VIII with a small dentiform projection that protrudes into the valvifers IX (Fig. 20 F). Laterotergites VIII with two small dark spots on outer lateral margins (Fig. 20 F).
Male genitalia (Figs. 20 A–E, 21 C): Parameres with brown margin; anterior lobe little developed and rounded; dorsal lobe rounded with curved apex; posterior lobe rounded (Fig. 20 B,D,E, 21 C). Proctiger with subtriangular posterior face (Figs. 20 D,E, 21 C). Ventral rim with expansions little developed, rounded, concolorous with surface, the expansions not reaching beyond apices of posterolateral angles (Fig. 20 C).
Female genitalia: Valvifers VIII with dark punctured; inner margins contiguous, with brown band and not divergent; distal margin forming distal U-shaped excavation, brown and arched. Laterotergites IX with apices acuminate passing the sclerite uniting laterotergites VIII (Fig. 20 F).
Comments. The syntypes of Edessa sexdens were divided between the Kiel and Copenhagen museums, following a well-known division of Fabricius’ material. The lectotype designated here has an original blue label (Fig. 21 D). Edessa (E.) sexdens resembles E. (E.) alces, E. (E.) congrua, and E. (E.) urus, but it can be separated from them by the black punctures in the cicatrices of pronotum (Fig. 29 C) and the scutellum reaching or surpassing the level of the distal angle of the corium (Fig. 29 C), while in the other species the scutellum clearly does not reach the end of the corium (Fig. 24 A,E). See E. (E.) alces for additional comments.
Distribution (Fig. 30 A): JAMAICA; SURINAME: Marowijne, Paramarinbo; BRAZIL: Pará.
description: Published as part of Mendonça, Maria Thayane Da Silva, Silva, Valéria Juliete Da & Fernandes, José Antônio Marin, 2023, Diagnose of the nominal subgenus of Edessa and description of the E. sexdens group (Heteroptera, Pentatomidae, Edessinae), pp. 1-63 in Zootaxa 5240 (1) on pages 46-49, DOI: 10.11646/zootaxa.5240.1.1, http://zenodo.org/record/7639547