Thyanta humilis, Bergroth, 1981

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 : 20

Thyanta humilis

( Figs. 10 , 93–100 ; Tab. 2 )

Eggs barrel-shaped; operculum circular and convex; chorion light brown and opaque, except for the operculum ochre and bright; chorion surface almost smooth or with irregular projections; aero-micropylar processes short and white ( Fig. 10 ).

In the SEM, chorion surface nearly smooth at some areas of lateral wall and almost the whole anterior pole ( Figs. 93, 94 ). At those areas, small circular projections grant the chorion a granulated aspect ( Fig. 95 ). Lateral wall of the egg and, sometimes, central area of the operculum have mushroom-like projections ( Figs. 96, 97 ). Projections with irregular edges, spongy texture, and a central depression, which does not seem to be continuous with the internal part of the egg ( Fig. 98 ). Mushroom-like projections more numerous, higher and more irregular at anterior pole, near aero-micropylar processes ( Fig. 99 ). Aero-micropylar processes small, with a very short stalk and an apical piriform portion, with a central hole ( Fig. 99 ); surface with spongy aspect at larger magnification ( Fig. 100 ).

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 86–100. Eggs of Pentatomidae in SEM. Fig. 86. Detail of an aero-micropylar process of L. deducta egg. Fig. 87. Egg of Pallantia macunaima in lateral view. Contact area with neighboring egg (arrow). Fig. 88. Egg of P. mac un - aima in dorsal view. Fig. 89. Detail of the chorion of P. macunaima egg, covered with spines connected by fine sheets (asterisk). Fig. 90. Aero-micropylar processes of P. macunaima egg. Apical hole (arrow). Fig. 91. Egg of Odmalea basalis in dorsal view. Fig. 92. Detail of the chorion surface of O. basalis egg. Fig. 93. Egg of Thyanta humilis in lateral view. Fig. 94. Egg of T. humilis in dorsal view. Fig. 95. Detail of the lateral wall of T. humilis egg, with small circular projections at surface. Fig. 96. Lateral wall of T. humilis egg, with two types of chorion sculpture: an area with granulated surface and other with mushroom-like projections. Fig. 97. Detail of the lateral wall of T. humilis egg with mushroom-like projections. Fig. 98. Detail of mushroom-like projections of the chorion of T. humilis egg. Central hole (arrow). Fig. 99. Anterior pole of T. humilis egg. Fig. 100. Detail of the spongy wall of an aero-micropylar process of T. humilis egg. (amp —aero-micropylar processes; ap—anterior pole; el—eclosion line; gr—granulated surface; lw—lateral wall; mp—mushroom-like projections; op—operculum).