Edessa stalii, Distant, 1881

Campos, Breno Batista, Nunes, Benedito Mendes, Bitar, Murilo Victor Silva & Fernandes, Jose Antonio Marin, 2020, Description of a new group of species of Edessa Fabricius, 1803 (Hemiptera: Pentatomidae: Edessinae) with translucent spot on hemelytra, Zootaxa 4810 (1), pp. 131-142 : 132-133

publication ID	https://doi.org/ 10.11646/zootaxa.4810.1.7
publication LSID	lsid:zoobank.org:pub:8FFCB5C3-0C91-45EF-A97E-FCE961C4D250
DOI	https://doi.org/10.5281/zenodo.4328781
persistent identifier	https://treatment.plazi.org/id/03AA87EE-C73D-9E61-D3A9-4A30EF5FFEBC
treatment provided by	Plazi
scientific name	Edessa stalii
status

Treatment

Edessa stalii group

( Figs. 1–4 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 A–D; 5A–H; 6)

Diagnosis. Dorsal surface green, corium with a dark brown stripe adjacent to clavus ( Fig. 5A View FIGURE 5 ). Ventral surface greenish yellow to green ( Fig. 5D View FIGURE 5 ). Antennae mostly black ( Fig. 5G View FIGURE 5 ). Anterolateral margins of pronotum orange or yellow ( Fig. 5A,E View FIGURE 5 ). Punctation of pronotum sparser than punctation of scutellum. Humeral angles acute and poorly developed ( Fig. 5C View FIGURE 5 ). Part of the corium weakly pigmented and translucent ( Fig. 5C View FIGURE 5 ). Metasternal process elevated anteriorly; anterior bifurcation arms divergent, short, receiving only fourth rostral segment ( Fig. 5D View FIGURE 5 ). Apex of each connexival segment with a small black tooth. Pygophore (pyg) open in caudal view, leaving parameres (pa) completely exposed ( Fig. 2A View FIGURE 2 ); inner side of each posterolateral angle (pla) tumid or tumescent just below the angle ( Fig. 3B View FIGURE 3 ). Gonocoxites 8 (gc8) with posterior margins strongly excavated, not touching laterotergites 9 (la9) and gonocoxites 9 (gc9) in most of its extension ( Fig. 1D View FIGURE 1 ). Gonocoxites 9 with a median ridge ( Fig. 3D View FIGURE 3 ).

Description. Head. Dorsal surface without spots ( Fig. 5C View FIGURE 5 ). Mandibular plates slightly transversely ridged, longer than tylus and contiguous in front of it, apex curved ventrally. Antennal segment II almost equal in length to III, except in Edessa translucida sp. n. and Edessa bryoviridis sp. n.; IV and V with more setae than the previous segments. Bucculae narrow, subrectangular and enclosing first rostral segment ( Fig. 5D View FIGURE 5 ). Rostrum elongate, yellowish, setose with a black spot on apex ( Fig. 5F View FIGURE 5 ).

Thorax. Pronotum trapezoidal, wider than long; anterolateral angles armed each with a small tooth. Pronotum with shallow brown punctation, except on cicatrices ( Fig. 5A,C View FIGURE 5 ). Scutellum with punctation dark, sparser on disc, more concentrated posterolaterally. Membrane of hemelytra light brown to dark brown ( Fig. 5C,E View FIGURE 5 ). Evaporatorium whitish, matte ( Fig. 5B,F View FIGURE 5 ). Peritremes ruga-like, each reaching 2/3 of distance from scent gland ostiole to lateral margin of thorax. Legs yellowish, distal margin of femora with three pairs of tiny black teeth ( Fig. 5D,F,H View FIGURE 5 ).

Abdomen. Dorsal surface light green. Connexivum completely green with shallow and concolorous punctation concentrated in two lateral excavations ( Fig. 5C,E,G View FIGURE 5 ). Ventral surface lacks brown stripes ( Fig. 5D,F View FIGURE 5 ). Spiracles elliptical. One trichobothrium in line with spiracles and the other laterad.

Male ( Figs. 1–4 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 A–C). Pygophore trapezoidal in dorsal view, open dorsoposteriorly ( Fig. 1A View FIGURE 1 ). Dorsal rim (dr) strongly excavated, superior process of genital cup (gc) visible in dorsal view ( Fig. 3A View FIGURE 3 ). Superior process of the genital cup slightly curved, posterior surface concave ( Fig. 2B View FIGURE 2 ). Proctiger (proc) with lateral excavations covered with dense short setae ( Figs. 2B View FIGURE 2 ; 4B View FIGURE 4 ); dorsal surface shiny distally delimited by brown carina ( Fig. 1B View FIGURE 1 ); posterior surface subtriangular ( Fig. 1B View FIGURE 1 ).

Female ( Figs. 1–4D View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 ). Gonocoxites 8 projected over laterotergites 9 ( Fig. 1D View FIGURE 1 ). Gonocoxites 9 trapezoidal and laterally compressed ( Fig. 4D View FIGURE 4 ). Laterotergites 8 (la8) distally with a black spine; surpassing seventh segment of abdomen ( Fig. 4D View FIGURE 4 ). Lateral sides of gonocoxites 9, distal part of gonocoxites 8, and base of laterotergites 9 excavated and curved, forming an obtuse angle with remaining of gonocoxites 8. Laterotergites 9 with apex acute below the level of laterotergites 8 ( Fig. 2D View FIGURE 2 ).

Comments. Based on the revision of Hypoxys Amyot & Serville ( Nunes et al. 2020), we conclude that the E. stalii group does not belong to this genus because the specimens are much smaller than specimens of Hypoxys ; antennomeres black with white or yellowish rings (uniformly yellow to brown in Hypoxys ); punctation of pronotum and scutellum light brown and similar in size (punctation not uniform in size or color, usually presenting large punctures on dark spots in Hypoxys ); apices of humeral angles not dark (black or brown in Hypoxys ); disc of corium translucent (never translucent in Hypoxys ); pygophore remarkably open in caudal view leaving parameres completely visible (parameres partially visible in Hypoxys ); gonocoxites 8 with posterior margin not touching laterotergites 9 and gonocoxites 9 in most of its extension (gonocoxites 8 always touching laterotergites 9 and gonocoxites 9 in Hypoxys ).

Distribution ( Fig. 6 View FIGURE 6 ). MEXICO: Chiapas; GUATEMALA: Guatemala, Escuintla; EL SALVADOR: San Salvador, La Libertad; COSTA RICA: Guanacaste, Puntarenas, Cartago; PANAMA: Chiriquí.