Wikipedia
Oecocecis
Oecocecis is a genus of moth in the family Gelechiidae. It contains the species Oecocecis guyonella, which is found in southern Europe ( France, Sicily and Cyprus), North Africa and Syria.
The larvae feed on Limoniastrum guyonianum and Limoniastrum monopetalum. They create a brownish-red hard, spherical gall on the tender branch or peduncle of their host plant. Pupation takes place within the gall.