The following information accompanied stocks donated to the Bloomington Drosophila Stock Center by Hugo Bellen at the Baylor College of Medicine. The following constructs are reported in Sandoval et al., (2014). Mitochondrial fusion but not fission regulates larval growth and synaptic development through steroid hormone production. eLife 3(): e03558 (FBrf0226654). P{Marf-gHA}2 is a second chromosome insertion. P{UAS-Marf.HA.S}3 is a third chromosome insertion. P{UAS-Marf.miRNA.CDS.S}3 is a third chromosome insertion. P{UAS-Opa1.miRNA.CDS}3 is a third chromosome insertion. P{UAS-Drp1.miRNA.CDS.S}3 is a third chromosome insertion.