Edessinae, Amyot & Serville, 1843

Almeida, Flavio Roberto De Albuquerque, Nunes, Benedito Mendes & Fernandes, Jose Antonio Marin, 2018, A new genus and new species of Edessinae (Hemiptera: Heteroptera: Pentatomidae), Zootaxa 4377 (2), pp. 254-268 : 255-256

Key to genera of Edessinae and subgenera of Edessa . Modified from Grazia et al. 2015

1. Body rounded; anterior apex of metasternal process not surpassing mesocoxae, sulcate but not clearly bifurcated ( Fig. 1 )...................................................................................... Brachystethus Laporte

- Body with different shapes but usually elongate, lateral margins subparallel; metasternal process clearly surpassing mesocoxae, anterior part with different shapes but never only sulcate ( Figs. 2–4 )........................................ 2

2. Metasternal process anteriorly clearly bifurcated ( Fig. 2 )...................................................... 4

- Metasternal process projected anteriorly in a simple process ( Figs. 3, 4 ).......................................... 3

3. Metasternal process long, surpassing procoxae ( Fig. 3 ), laterally compressed, fused with sterna; humeral angles slightly projected and acute.......................................................................... Pantochlora Stål

- Metasternal process short, not reaching procoxae ( Fig. 4 ), conical, not in contact with sterna; humeral angles projected laterally, apices sharp................................................................ Doesburgedessa Fernandes

4. Antennae four-segmented; second antennomer very long, at least three times longer than the first ( Fig. 5 ); humeral angles globose......................................................................... Peromatus Amyot & Serville

- Antennae five-segmented ( Fig. 6 ); second antennomer short, at most twice longer than the first; humeral angles variable in shape............................................................................................... 5

5. Posterior margin of pronotum with a large pair of spines overlapping basal angles of scutellum ( Fig. 7 ); humeral angles long, sinuous, and laterally directed..................................................................... Olbia Stål

- Posterior margin of pronotum without large spines or other projections ( Fig. 8 ); humeral angles variable in shape......... 6

6. Head with 6-8 solid black stripes, punctures of the head concentrated on these stripes ( Fig. 9 ); proctiger with a medial carina on posterior face.......................................................... Grammedessa Correia & Fernandes

- Head with punctures sparse or concentrated but never on black solid lines ( Fig. 10 ); posterior face of proctiger without medial carina............................................................................................... 7

7. Humeral angles rounded or acute but shorter than head width ( Figs. 11, 12 )........................................ 8

- Humeral angles globose, depressed dorsoventrally or acute and normally longer than head width ( Figs. 13, 14 ).......... 12

8. Species elongate; humeral angles acute ( Fig. 11 , red arrow); abdominal segment VII projected posteriorly ( Figs. 15, 16 ) and contrastingly dark at least in distal half ( Figs. 11, 20 )......................................................... 9

- Species rounded; humeral angles rounded ( Fig. 12 , red arrow); abdominal segment VII not posteriorly projected ( Fig. 17 ) and concolorous with connexivum ( Fig. 12 )................................................................... 13

9. Legs with black stripes ( Fig. 18 ); antennae black, except first segment with a ventral yellow spot ( Fig. 18 ); pygophore with posterolateral angles developed and posterolaterally directed ( Figs. 23–25 ); females with gonapophysis 9 bearing a small

tumescence at the base of gonocoxites 9 ( Figs. 40, 41 )........................................ Plagaedessa gen. n. - Legs unicolorous ( Fig. 19 ); antennae yellow to light brown ( Fig. 19 ); pygophore with posterolateral angles barely developed and posteriorly directed; females without tumescence on gonapophysis 9........................................ 10

10. Corium uniformly brown with contrastingly yellow veins sometimes strongly branched ( Fig. 20 ); abdominal segment VII at least 1.5 times longer than wide at base ( Fig. 15 ); proctiger with posterior face rounded; phallus with a distal constriction; capsula seminalis as big as or bigger than laterotergites 8 and 9...........................subg. Pygoda Amyot & Serville

- Corium brown variegate with whitish and blackish spots ( Figs. 8 , 11 ); abdominal segment VII at most 1.2 times longer than wide at base ( Fig. 16 ); proctiger with posterior face flat; phallus not constricted distally; capsula seminalis smaller than laterotergitos 8 and 9.................................................................................... 11

11. Pronotum unicolorous ( Fig. 11 ); dorsal surface of abdomen mostly metallic blue ( Fig. 11 ); posterior part of proctiger expanded laterally in a flat plate (see Silva et al. 2013 — Figs. 2 , 27 ); gonocoxites 8 somewhat reduced, leaving visible the sclerotized gonapophyses 8............................................................... Paraedessa Silva & Fernandes

- Pronotum with dark transversal stripe ( Fig. 8 ); dorsal surface of abdomen never metallic blue; posterior part of proctiger not expanded laterally, posterior face thick; gonocoxites 8 never reduced, leaving visible at most a tiny membranous part of gonapophyses 8............................................................ subg. Hypoxys Amyot & Serville

12. Humeral angles long, apex acute ( Fig. 13 , red arrow); abdominal segment VII twisted and strongly projected posteriorly, far surpassing genital plates or pygophore; pronotum with an anterior yellow stripe ( Fig. 13 )...................................................................................................... subg. Dorypleura Amyot & Serville

- Humeral angles variable in length, apex globose ( Fig. 14 , red arrow); abdominal segment VII not twisted and not projected as far posteriorly as above, not reaching to slightly surpassing genital plates or pygophore; pronotum without anterior yellow stripe ( Fig. 14 ) (except Edessa pictiventris Stål, 1872 )...................................... subg. Edessa Fabricius

13. Pronotal disk tumid; body covered with dark punctures; arms of the metasternal process developed and sometimes slightly laterally compressed ( Fig. 21 ); Central America (except Ascra bifida Say, 1832 also found in north part of South America).................................................................................................. Ascra Say

- Pronotal disk not tumid; body covered with concolorous or light brown punctures; arms of the metasternal process strongly laterally compressed ( Fig. 22 ), barely developed in some species; South America (except the widespread species Edessa rufomarginata (De Geer, 1773)) ................................................. subg. Aceratodes Amyot & Serville

Figures

FIGURES 1–10. 1–4 Metasternal process; 1—Brachystethus geniculatus (Fabricius, 1787); 2—Peromatus bolivianus Fallou, 1887; 3—Pantochlora vivida Stål, 1870; 4—Doesburguedessa nigrolimbata Fernandes, 2010. 5–6 Dorsal view of head and pronotum; 5—Peromatus bolivianus; 6—Edessa (Pygoda) sp. 7–8 Dorsal view; 7—Olbia caprina (Stål, 1862); 8—Edessa (Hypoxys) boerneri Breddin, 1904. 9–10 Dorsal view of head and pronotum; 9—Grammedessa sp.; 10—Edessa cervus (Fabricius, 1787). (Scale = 2mm).

FIGURES 11–22. 11–14 Dorsal view; 11—Paraedessa verhoeffi (Breddin, 1904); 12—Ascra bifida Say, 1832; 13—Edessa (Dorypleura) bubalus LePeletier & Serville, 1825; 14—Edessa (Edessa) elaphus Breddin, 1905. 15–17 Female, genital plates, ventral view; 15—Edessa (Pygoda) polita (LePeletier & Serville, 1825); 16—Edessa (Hypoxys) boerneri; 17—Edessa (Aceratodes) brasiliensis Silva et al., 2006. 18–19 Ventral view of head and thorax; 18—Plagaedessa celsa; 19—Edessa (Hypoxys) boerneri. 20—Dorsal view of Edessa (Pygoda) polita. 21–22 Metasternal process; 21—Ascra bifida; 22—Edessa (Aceratodes) rufomarginata (De Geer, 1773). (Scale = 2mm).

FIGURES 23–27. Plagaedessa celsa. 23–25 Male, pygophore; 23—dorsal view; 24—posterior view; 25—ventral view. 26— Female, genital plates. 27—Metasternal process, ventral view.(pyg–pygophore; dr–dorsal rim; vr–ventral rim; proc–proctiger; gp–genital superior process; pa–parameres; gc8–gonocoxite 8; gc9–gonocoxite 9; la8–laterotergite 8; la9–laterotergite 9; x– abdominal segment X. Scale = 1mm).

FIGURES 40–43. 40–41 Laterotergites, gonocoxites and gonapophyses of ninth segment, and ectodermical genital ducts, ventral: 40—Plagaedessa celsa; 41—P. distanti. 42—Female, genital plates of P. celsa. 43—Phallus of P. celsa, lateral view. (aaf–anterior annular flange; ch–chitinellipsen; cs–capsula seminalis; dr–ductus receptaculi; paf–posterior annular flange; pc– pars comunis; ph–phallus; pi–pars intermedialis; tdr–thickening of ductus receptaculi; tg9–thickening of gonapophyses 9; tvi– thickening of vaginal intima; ves–vesical.Scale = 1mm).