Podisus distinctus (Stål, 1860)

Matesco, Viviana Cauduro, Bianchi, Filipe Michels, Fürstenau, Brenda Bianca Rodrigues Jesse, Silva, Priscila Poock Da, Campos, L, 2014, External egg structure of the Pentatomidae (Hemiptera: Heteroptera) and the search for characters with phylogenetic importance, Zootaxa 3768 (3), pp. 351-385: 361-362

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Podisus distinctus (Stål, 1860)


Podisus distinctus (Stål, 1860)  and Podisus nigrispinus (Dallas, 1851) 

( Figs. 1View FIGURES 1 – 12, 13–22View FIGURES 13 – 24; Tab. 2)

Eggs barrel-shaped; color prior to embryonic development yellow in P. distinctus  and golden yellow with black spines in P. nigrispinus  ( Fig. 1View FIGURES 1 – 12); operculum round and convex; chorion translucent and spinose. An eclosion line is evident under SM as a smooth light band delimited by the AMPs ( Fig. 1View FIGURES 1 – 12). With the development of the embryo, the eggs become darker, and the red eyes of the nymph become evident through the chorion. The aero-micropylar processes are circularly arranged in a row around the anterior pole, translucent, very long and slender ( Fig. 1View FIGURES 1 – 12). Embryonic development has not been followed, so the egg-burster has not been observed. According to Grazia et al. (1985), the egg-burster in P. nigrispinus  (described as P. connexivus Bergroth  ) does not become evident during embryonic development because of its lighter color. The morphological aspects of the eggs have been previously studied under SM for P. nigrispinus  ( Grazia et al. 1985; Saini 1994) and more recently under SEM for P. distinctus  , emphasizing its postdepositional dynamics ( Sá et al. 2013).

The chorion surface is sparsely spinose under SEM. The lateral wall bears short interconnected spines forming wide polygonal markings ( Figs. 13, 15, 18, 20View FIGURES 13 – 24). The operculum is similarly sculptured, but the spines are longer, and the polygonal markings are less evident ( Figs. 14, 19View FIGURES 13 – 24), especially in P. nigrispinus  . The eclosion line is evident as a slightly depressed broad smooth strip ( Figs. 16, 21View FIGURES 13 – 24). The aero-micropylar processes are slightly clubbed at apex, and their openings are subapical and outwardly directed ( Figs. 16, 17, 21, 22View FIGURES 13 – 24). The surface of the processes is smooth even under higher magnification ( Figs. 17, 22View FIGURES 13 – 24).