Stethaulax marmorata (Say)

Weiler, L., Barão, K. R., Cassis, G. & Grazia, J., 2016, Morphology of the external scent efferent system of Neotropical shield bugs (Hemiptera: Scutelleridae: Pachycorinae), Zoomorphology 136, pp. 1-16 : 12

Stethaulax marmorata (Say)

Ostiole closer to metacoxal cavity than to lateral margin of metapleuron ( Fig. 20a ); ostiole elliptic, oriented ventrolaterally, visible in lateral view; lateral margin of ostiolar plate elevated; peritreme groove-shaped, directed laterally and apically curved anteriorly, parallel to surrounding pleuron ( Fig. 20b ), median furrow well developed; peritremal surface with scale-like microsculptures ( Fig. 20c ). Evaporatorium well developed on meso- and metapleuron; on metapleuron, evaporatorium completely covering ostiolar plate and reaching between coxal cavities, outer margin of metapleural evaporatorium convex; on mesopleuron, well developed on mesepimeron; evaporatorium punctate ( Fig. 20d ); mushroom bodies irregular, alveoli with several trabeculae. Metathoracic spiracle wide; metapleural margin of spiracle with several setae; processes of the filter system of regular diameter, processes spiny ( Fig. 20e ).

Figures

Fig. 20 External scent efferent system of Stethaulax marmorata. a Meso- and metapleuron. b Peritreme. c Peritremal surface. d Detail of evaporatorium. e Spiracular filter system. Bars a 500 µm; b 200 µm; c–e 20 µm