Phylogenetic tree of candidate GmelORs with known lepidopteran olfactory receptor (OR) sequences. Gmel, Galleria mellonella; Csup, Chilo suppressalis; Ofur, Ostrinia furnacalis; Cmed, Cnaphalocrocis medinalis; Cpun, Conogethes punctiferalis; Bmor, Bombyx mori. The clade in purple indicates the Orco receptor gene clade.