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

Figure 13

Types, sizes, and distribution of the sensilla of the Belostomatinae (Limnogeton fieberi). (a) PES are specifically situated only in the small area near the apex. (b) TRS2 (three), TRS1 (five) form a single row and are placed dorsally (D) near the apex of the labium. (c) TRS2 (two), TRS1 (six) form a single row and are placed ventrally (V) near the apex of the labium. (d) CH1, CH2, and CH3 densely cover the dorsal surface of the labium on segments II and III. (e) CH3 are numerous and is cover all surface of the ventral side of segment II, one pair of CH2 and at the base of the second segment, CH3 are densely distributed over segment I (ventrally). (f) Total view on the labial segments showing type (A) distribution of the labial sensilla.