Edessa meditabunda, Fabricius, 1974

Matesco, Viviana C., Fürstenau, Brenda B. R. J., Bernardes, Jorge L. C., Schwertner, Cristiano F. & Grazia, Jocélia, 2009, Morphological features of the eggs of Pentatomidae (Hemiptera: Heteroptera) *, Zootaxa 1984, pp. 1-30 : 9-10

Edessa meditabunda

( Figs. 11–16 ; Tab. 2 )

Eggs esferoidal; light green; operculum ellipsoidal and convex; chorion translucent and bright. With the development of the embryo, two small red stains become visible under the translucent operculum, close to the border and opposed to each other, corresponding to the eyes of the future nymphs, along with the dark brown ruptor ovis ( Rizzo 1971, 1976). A series of tiny light spots in the fusion of the operculum and the rest of the chorion described by Rizzo (1971, 1976) corresponds to the translucent aero-micropylar processes, which are very small in this species. When observed in light stereomicroscope, the chorion shows a nearly smooth surface, in spite of its description by Rizzo (1971, 1976) as alveolate.

Chorion surface, in SEM, is clearly granulated ( Fig. 11 ), devoid of depressions, showing only polymorphic granules: larger and more spaced or smaller and more densely distributed ( Figs. 12, 13 ). Operculum less delimited; the eclosion line represented by a flatter and depressed area, inward the aero-micropylar processes ( Figs. 11, 14 ). Aero-micropylar processes circularly arranged near rim of the egg, slightly developed in small tubercles ( Figs. 14, 15 ) or stalked projections, gradually expanded toward apex ( Fig. 16 ).

Figures

FIGURES 11–25. Eggs of Pentatomidae in SEM. Fig. 11. Egg of Edessa meditabunda in dorsal view. Fig. 12. Chorion of E. meditabunda egg, showing granulated pattern. Fig. 13. Detail of the chorion of E. meditabunda egg, with polymorphic granules (arrows). Fig. 14. Anterior pole of E. meditabunda egg. Fig. 15. Detail of an aero-micropylar process of E. meditabunda egg, appearing as a small tubercle slightly projecting. Fig. 16. Aero-micropylar process of E. meditabunda egg, in the shape of a stalk projection. Fig. 17. Egg of Euschistus (Mitripus) convergens in lateral view. Posterior pole with sheets of adhesive material (arrow). Fig. 18. Egg of E. convergens in dorsal view. Fig. 19. Spinose chorion in the lateral wall of E. convergens egg. Fig. 20. Detail of E. convergens chorion, with long and acute spines (arrow) in the vertex of polygonal figures. Fig. 21. Detail of the chorion of E. convergens egg in a dorsal view. Aero-micropylar process (arrow). Fig. 22. Detail of chorion sculpture in the operculum of E. convergens egg near the aero-micropylar processes. Fine sheets connecting the spines (asterisk). Fig. 23. Detail of an aero-micropylar process of E. convergens egg, with smooth surface. Central hole (arrow). Fig. 24. Egg of Euschistus (Mitripus) hansi in lateral view. Area of egg fixation to the substratum (arrow). Fig. 25. Egg of E. hansi in dorsal view. (amp—aero-micropylar processes; ap—anterior pole; el —eclosion line; lw—lateral wall; op—operculum).