Last week I wrote about treehoppers (membracids) and the new evidence, published in Nature, that their bizarre “helmets” are actually homologous to ancestral wing structures. This evidence included the observation that, like wings, the treehopper helmet is heavily covered with veins, and, like wings, is inflated shortly after the final moult, which produces the adult. (There was also genetic evidence: the same “key” genes induce both wing and helmet development.)
Via Bug Girl’s Blog, where BG has just posted on that paper, we have this video from Nature showing a treehopper, right after its final moult, inflating first its wings and then its helmet. I can’t embed it here, but click on this link to watch it. It’s a graphic demonstration of the relatedness of these two structures.
Here are three screenshots showing the inflation of first the wings and then the helmet.