From the Editors Gallery | February 2020 cover Many arthropod morphological novelties originate as outgrowths of the body wall, and few are as spectacular as the helmets of treehoppers, such as the helicopter-like helmet of Bocydium globulare. Patrick Goymer Feb 04, 2020 Share Tweet Share Share Fisher et al. Co-option of wing-patterning genes underlies the evolution of the treehopper helmet. Nat. Ecol. Evol. 4, 250-260 (2020).