A new paper shows that the sensory pits on the cuticle of planthopper nymphs (Fulgoromorpha) do not respond to sound, ultrasound, mechanical stimulation, temperature changes, or magnetic fields. They do, however, respond to stimulation with very low intensity electric fields. This, together with the arrangement of these special sensory structures on the body surface of planthoppers, imply that these sensory organs perceive electric fields in the environment. The authors suggest that this sense may help the bugs to avoid predators or parasitoids. This finding also corresponds with recently published observations for treehoppers (Membracidae), where the horn-like extensions of the pronotum contain similar sensory pits.
Electrosensitivity in planthoppers (Insecta: Hemiptera: Auchenorrhyncha: Fulgoromorpha). (2026) Journal of Comparative Physiology A, 1-13. https://doi.org/10.1007/s00359-025-01790-1

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