Comparative Analysis and Systematic Mapping of the Labial Sensilla in the Nepomorpha (Heteroptera: Insecta)

Figure 29

Types and sizes of the sensilla of the Corixidae: Corixinae (Corixa dentipes). (a) BD (no. 1–6) are spread evenly on the dorsal surface of the labium; several CH1 and CH2 are arranged on the lateral and ventral edges of the membranous labial lip (AT); CH1 located on the lateral edge of the labium below the apical tip. (b) BD magnified. (c) Three rows of porous sensilla (PLS) and RBS2 and RBS1 sensilla situated in two rows. (d) The apical tip (AT) with PES, PAS2, and RBS2 sensilla unevenly spread except for PES (they form a row). (e) PAS2 and RBS2 magnified. (f) Ventral view, CH1 are numerous and arranged on the lateral and frontal edges of the labium; shorter CH1 arranged in one row on the ventral side of the base of the labium.