Chinavia erythrocnemis

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 : 10-12

Chinavia erythrocnemis , Chinavia longicorialis , Chinavia obstinata , and Chinavia pengue

( Figs. 2–4 , 37–67 ; Tab. 2 )

Eggs barrel-shaped; operculum circular and convex; chorion surface reticulated, light brown ( Figs. 2–4 ). Chorion surface was erroneously described as white-translucent and granular in C. obstinata ( Matesco et al. 2003) ; in fact, a light brown color of the eggs is due to a pigmented chorion, and its sculpture fits the reticulated pattern described by Bundy & McPherson (2000). Aero-micropylar processes white, clavate at apex. With the development of embryo, red eyes, and dark brown ruptor ovis become visible ( Fig. 2 ). Ruptor ovis triangular, translucent, dark brown at the base and along the median line ( Matesco et al. 2003, 2006, 2007, 2008b).

Egg surface, in SEM, in a reticulated sculpture pattern ( Figs. 37, 38 , 47, 48, 54 , 59, 60 ), with polygonal, often hexagonal, cells ( Figs. 39, 40 , 61 ). In C. longicorialis , chorion has shallow polygonal cells, with slightly defined contour ( Fig. 49 ). Those cells projected inward in a funnel, which seems to bear a hole ( Figs. 41, 44, 52 ). Lateral walls of egg with more or less regular cells ( Figs. 39, 40 , 49 , 61 , 62 ); at oval area where eggs are fixed to each other in the egg mass or to the substratum sculpture pattern is altered ( Figs. 37 , 47 , 59 ).

Near aero-micropylar processes, polygonal cells smaller and deeper, with irregularly projected rims ( Figs. 42, 50, 55 , 63 ). The eclosion line, within the ring of aero-micropylar processes, is well delimited, devoid of depressions, and marked by a wrinkled area with dense capillary projections ( Figs. 42, 50 , 56 ). At the operculum, polygonal cells are smaller, deeper, and less delimited ( Figs. 43, 51 , 57, 64 ); sometimes seeming to bear a hole ( Figs. 44, 52 ). In C. pengue , cells at lateral wall of the egg ( Fig. 62 ) as well as at the operculum ( Fig. 65 ) have a blind bottom.

Aero-micropylar processes clavated, with a stalk that decreases in diameter toward the base, and a bulbous apical part, which bears an apical opening ( Figs. 45, 50, 53 , 56, 63, 67 ). Aero-micropylar processes surface in a spongy texture ( Figs. 46, 53 , 58, 67 ). In C. pengue , fine connector sheets were found among adjacent aero-micropylar processes or between the process and adjacent area of the anterior pole ( Figs. 63, 66, 67 ).

Figures

FIGURES 1–10. Eggs of Pentatomidae. Fig. 1. Fertile eggs of Euschistus (Mitripus) convergens in dorsal view. Ruptor ovis (arrow). Fig. 2. Fertile eggs of Chinavia erythrocnemis in dorsal view. Aero-micropylar process (arrow). Fig. 3. Eggs of Chinavia longicorialis in dorsal view. Fig. 4. Eggs of Chinavia pengue in dorsal view. Fig. 5. Eggs of Chinavia musiva in dorsal view. Fig. 6. Fertile eggs of C. musiva in dorsal view. Eye (arrow). Fig. 7. Eggs of Grazia tincta in dorsal view. Fig. 8. Egg of Odmalea basalis in dorsal view. Fig. 9. Eggs of O. basalis in lateral view. Fig. 10. Eggs of Thyanta humilis in dorsal view.

FIGURES 26–40. Eggs of Pentatomidae in SEM. Fig. 26. Chorion of the lateral wall of E. hansi egg, with laminate expansions. Fig. 27. Detail of the chorion of E. hansi egg, with spine-shaped projections with different lengths. Fig. 28. Lateral wall of E. hansi egg, with spines tied by fine sheets (asterisk). Fig. 29. Lateral wall of E. hansi egg, with long spines inserted by smaller ones. Fig. 30. Anterior pole of E. hansi egg. Fig. 31. Aero-micropylar process of E. hansi egg, with a central hole (arrow). Fig. 32. Detail of an aero-micropylar process of E. hansi egg, with smooth walls. Fig. 33. Egg of Euschistus (Lycipta) picticornis in lateral view. Posterior pole covered by adhesive material (arrow). Fig. 34. Surface of the lateral wall of E. picticornis egg. Fig. 35. Detail of the lateral wall of E. picticornis egg, near the aero-micropylar processes. Spines tied by fine sheets (asterisk). Fig. 36. Detail of an aero-micropylar process of E. picticornis egg, with smooth walls. Fig. 37. Egg of Chinavia erythrocnemis in lateral view. Contact area with neighboring egg (arrow). Fig. 38. Egg of C. erythrocnemis in dorsal view. Fig. 39. Detail of the lateral wall of C. erythrocnemis egg. Polygonal cell (arrow). Fig. 40. Reticulated chorion of C. erythrocnemis egg in greater detail, showing polygonal cells. (amp—aeromicropylar processes; ap—anterior pole; op—operculum; pp—posterior pole).

FIGURES 41–55. Eggs of Chinavia spp. in SEM. Fig. 41. Detail of a hexagonal cell in C. erythrocnemis egg. Central area similar to a hole (arrow). Fig. 42. Detail of anterior pole of C. erythrocnemis egg. Cells with irregular rims (asterisk). Fig. 43. Chorion surface in the operculum of C. erythrocnemis egg. Fig. 44. Detail of polygonal cells in the operculum of C. erythrocnemis egg. Fig. 45. Aero-micropylar process of C. erythrocnemis egg. Apical portion (a) with an opening (arrow); basal stalk (b). Fig. 46. Detail of the spongy surface of an aero-micropylar process of C. erythrocnemis egg. Fig. 47. Egg of Chinavia longicorialis in lateral view. Contact area with neighboring egg (arrow). Fig. 48. Egg of C. longicorialis in dorsal view. Fig. 49. Detail of the lateral wall of C. longicorialis egg. Fig. 50. Detail of the anterior pole of C. longicorialis egg. Fig. 51. Operculum surface of C. longicorialis egg. Fig. 52. Detail of the central area of an operculum cell of C. longicorialis egg. Fig. 53. Aero-micropylar process of C. longicorialis egg, with spongy surface. Apical opening (arrow). Fig. 54. Egg of Chinavia obstinata in dorsal view. Fig. 55. Lateral wall of C. obstinata near the aeromicropylar processes. (amp—aero-micropylar processes; el—eclosion line; lw—lateral wall; op—operculum).

FIGURES 56–70. Eggs of Chinavia spp. in SEM. Fig. 56. Anterior pole of C. obstinata egg. Cells with irregular rims (asterisk); apical hole of an aero-micropylar process (arrow). Fig. 57. Operculum surface of the egg chorion of C. obstinata. Fig. 58. Detail of an aero-micropylar process of C. obstinata egg, with spongy surface. Fig. 59. Egg of Chinavia pengue in lateral view. Posterior pole with sheets of adhesive material to egg fixation to the substratum (arrow). Fig. 60. Egg of C. pengue in dorsal view. Fig. 61. Chorion of lateral wall of C. pengue egg. Fig. 62. Detail of the lateral wall chorion of C. pengue egg. Cell with blind bottom (arrow). Fig. 63. Lateral wall of C. pengue egg near the aero-micropylar processes. Smaller and deeper polygonal cells (arrow); connector sheets between an aero-micropylar process and adjacent area of the anterior pole (asterisk). Fig. 64. Chorion surface at operculum of C. pengue egg. Fig. 65. Detail of a cell at operculum of C. pengue egg. Central area with blind bottom (arrow). Fig. 66. Aero-micropylar processes of C. pengue egg, with fine connector sheets (asterisk). Fig. 67. Detail of the aero-micropylar processes of C. pengue egg. Apical hole (arrow); connector sheets (asterisk). Fig. 68. Egg of Chinavia musiva, in laterodorsal view. Fig. 69. Detail of the lateral wall of C. musiva egg. Fig. 70. Chorion of C. musiva egg, marked by circular areas over the surface (arrow). (amp—aero-micropylar process; el—eclosion line; op—operculum).