Zoomorphology

, Volume 136, Issue 1, pp 29–44 | Cite as

Morphology of the external scent efferent system of Neotropical shield bugs (Hemiptera: Scutelleridae: Pachycorinae)

Original paper

Abstract

The metathoracic scent glands are characteristic of the true bug suborder Heteroptera and are known to have defensive, sexual and aggregation roles, among others. The morphology of external scent efferent system (ESES) associated with these glands has taxonomic and phylogenetic importance. These structures have been documented previously in four of the eight Scutelleridae subfamilies. In this work we investigate them in detail in 22 genera of the New World subfamily Pachycorinae using scanning electron microscopy. We report five general types of ESES in pachycorine: (1) enlarged evaporatorium and well-developed peritreme; (2) well-developed evaporatorium and poorly developed or obsolete peritreme; (3) reduced evaporatorium and small or obsolete peritreme; (4) reduced evaporatorium on mesepimeron and elongate peritreme; (5) enlarged evaporatorium and elongate peritreme. Our results are in contradistinction to previous accounts of the ESES for the Pachycorinae which have been reported as being poorly developed. The Pachycorinae patterns do not support Schaefer’s hypothesis that there is a correlation between degree of development of the external metathoracic structures and way of life. We also demonstrate that these structures are of systematic importance in the Pachycorinae.

Keywords

Metathoracic glands Morphology New World Jewel bugs Taxonomy Scanning electron microscopy 

Supplementary material

435_2016_330_MOESM1_ESM.docx (40 kb)
Supplementary material 1 (DOCX 40 kb)
435_2016_330_MOESM2_ESM.docx (31 kb)
Supplementary material 2 (DOCX 30 kb)

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Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • L. Weiler
    • 1
    • 3
  • K. R. Barão
    • 1
    • 2
  • G. Cassis
    • 3
  • J. Grazia
    • 1
  1. 1.Programa de Pós-Graduação em Biologia Animal, Instituto de BiociênciasUniversidade Federal do Rio Grande do SulPorto AlegreBrazil
  2. 2.Departamento de ZoologiaUniversidade Federal do Rio Grande do SulPorto AlegreBrazil
  3. 3.Evolution and Ecology Research Centre, School of Biological, Earth and Environmental SciencesUniversity of New South WalesSydneyAustralia

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