Morphology of the external scent efferent system of Neotropical shield bugs (Hemiptera: Scutelleridae: Pachycorinae) Author Weiler, L. Programa de Pós-Graduação em Biologia Animal, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, Porto Alegre, RS 91501 - 970, Brazil & Evolution and Ecology Research Centre, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney 2052, Australia weiler.luciana@gmail.com Author Barão, K. R. Programa de Pós-Graduação em Biologia Animal, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, Porto Alegre, RS 91501 - 970, Brazil & Departamento de Zoologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil Author Cassis, G. Evolution and Ecology Research Centre, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney 2052, Australia Author Grazia, J. Programa de Pós-Graduação em Biologia Animal, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, Porto Alegre, RS 91501 - 970, Brazil text Zoomorphology 2016 2016-11-01 136 1 16 journal article 24180 10.1007/s00435-016-0330-y 0443e804-fe76-4832-b0a1-4feb573ed492 3636721 Ascanius hirtipes (Herrich-Schäffer) Ostiole in the middle of on metapleuron ( Fig. 4a ); ostiole elliptical, oriented ventrolaterally, not visible in lateral view; posterior margin of ostiolar plate elevated; peritreme spout-shaped, directed posterolaterally, elevated and parallel to surrounding pleuron ( Fig. 4b ), median furrow well developed; peritremal surface covered with scale-like microsculptures ( Fig. 4c ). Evaporatorium well developed on meso- and metapleuron; on metapleuron, evaporatorium covering most of the ostiolar plate and reaching between coxal cavities, outer marginof metapleural evaporatorium concave; on mesopleuron, well developed on mesepimeron; evaporatorium punctate ( Fig. 4d ); mushroom bodies irregular, alveoli with several trabeculae. Metathoracic spiracle wide; processes of the filter system of regular diameter, processes spiny ( Fig. 4e ).