Phylogenetic tree of candidate GmelIRs with known lepidopteran ionotropic receptor (IR) sequences. Gmel, Galleria mellonella; Csup, Chilo suppressalis; Ofur, Ostrinia furnacalis; Cmed, Cnaphalocrocis medinalis; Bmor, Bombyx mori; Cpun, Conogethes punctiferalis.