Mesepimeron and part of wing-to-body coupling mechanism. Part of the ‘Druckknopf’ system component, located in the thorax. The system allows for the complete coupling of hemelytra to the dorsum. Character 27 was proposed by studying only the complementary structure of the apparatus, located in mesepimeron, not that on the wing apparatus. A Knobshaped ‘Druckknopf’ system rounded, as long as wide B knobshaped ‘Druckknopf’ system piriform, longer than wide.

 
 
  Part of: Ribeiro JRI, Ferrari A (2023) Phylogenetic analysis of the Belostoma plebejum group sensu Nieser (Insecta, Hemiptera, Belostomatidae): the effect of adding continuous characters on its accuracy. Arthropod Systematics & Phylogeny 81: 1-34. https://doi.org/10.3897/asp.81.e87378