Gears
Guides
Issus coleoptratus
Issus coleoptratus is a flightless planthopper in the family Issidae, notable as the first species in which the function of gear-like structures on nymph hind legs was described. These intermeshing gears synchronize leg movement during jumping. Adults measure 5.5–7.0 mm and vary from light brown to nearly black. The species has one generation per year and feeds on phloem of various deciduous trees.