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

Figure 27

Types and sizes of the sensilla of the Notonectidae: Anisopinae (Buenoa uhleri). (a) Several CH3 and CH2 are present on the III segment (dorsal view). (b) Several CH3 and CH2 are present on the IV segment (dorsal view). (c) Several CH3 are scattered all over the surface of the IV segment (lateral view), two CH2 are situated near the distal edge of the III segment, and CH3 are situated in rows dorsally and laterally. (d) TRS1 (one) and TRS2 (two) are distributed over the dorsal side (D) near the apex of the labium; PAS2 (no. 1–9) are situated on the sensory field (left-side view; SFL). (e) Several CH3 are visible on the ventral side of the IV and III segments; TRS1 (two) are situated ventrally near the apex.