“…Ca 2+ is a second messenger, and Ca 2+ signaling networks often exhibit a “bow‐tie” structure in that the integrated effect of many inputs is governed by a small number of molecules in the calcium pathway, and they affect many outputs (Brodskiy & Zartman, ), similar to the way that many growth‐affecting factors impinge upon the Hippo kinase cascade. Like Hippo, growth and mechanical signals both affect Ca 2+ (Antunes, Pereira, Cordeiro, Almeida, & Jacinto, ; Balaji et al, ; Brodskiy et al, ; Narciso et al, ; Narciso, Contento, Storey, Hoelzle, & Zartman, ; Restrepo & Basler, ). Ca 2+ signaling in the wing disk exhibits a rich variety of dynamical behaviors.…”