Euschistus (Euschistus) heros (Fabricius, 1798)

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: 365

publication ID

http://dx.doi.org/10.11646/zootaxa.3768.3.5

publication LSID

lsid:zoobank.org:pub:076F3E92-066C-46A0-9ADE-09D3AA8F8707

persistent identifier

http://treatment.plazi.org/id/03A487D3-9A2E-0325-E497-21BCECAFF806

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Plazi

scientific name

Euschistus (Euschistus) heros (Fabricius, 1798)
status

 

Euschistus (Euschistus) heros (Fabricius, 1798)  , Euschistus (Lycipta) riograndensis Weiler & Grazia, 2011  , and Euschistus (Mitripus) paranticus Grazia, 1987 

( Figs. 2, 3View FIGURES 1 – 12, 31–42View FIGURES 25 – 36View FIGURES 37 – 48; Tab. 2)

Eggs barrel-shaped; color prior to embryonic development light green (in E. heros  ) or white (in E. riograndensis  and E. paranticus  ) ( Figs. 2, 3View FIGURES 1 – 12); operculum round, with variable convexity, usually slightly convex ( Figs. 2, 3View FIGURES 1 – 12), but conspicuously flatter in E. heros  ; chorion translucent and spinose. The eclosion line is not evident under SM; the AMPs are circularly arranged in a row around the anterior pole, white, moderately long and filiform ( Figs. 2, 3View FIGURES 1 – 12).

The chorion surface of all species of Euschistus Dallas  studied here is densely spinose under SEM. The interconnected spines form polygonal markings that are mostly triangular at the lateral wall ( Figs. 31View FIGURES 25 – 36, 39View FIGURES 37 – 48). The spines display different sizes, being usually thicker and longer at the triangle vertices ( Figs. 33View FIGURES 25 – 36, 37, 38View FIGURES 37 – 48). This pattern may be obscured by traces of adhesive material gluing adjacent eggs ( Fig. 39View FIGURES 37 – 48). The operculum is similarly sculptured, with interconnected spines forming triangles ( Figs. 32, 36View FIGURES 25 – 36, 40View FIGURES 37 – 48). The spines are shorter at the center of the operculum, and polygonal markings are sometimes obliterated ( Fig. 36View FIGURES 25 – 36). The spines display different sizes and are interconnected by a short membrane at the periphery of the operculum ( Figs. 34View FIGURES 25 – 36, 41View FIGURES 37 – 48). The eclosion line is not evident. The AMPs are tubular in E. riograndensis  ( Fig. 38View FIGURES 37 – 48) and slightly clubbed in the two other species ( Figs. 33, 34View FIGURES 25 – 36, 41View FIGURES 37 – 48). Their openings are circular and apical, and there are fine connector sheets among adjacent AMPs in E. heros  ( Fig. 34View FIGURES 25 – 36). The surface of the AMPs is spongy under higher magnification ( Figs. 35View FIGURES 25 – 36, 42View FIGURES 37 – 48).