The number of gall types known worldwide is estimated to be approximately 15,000, of which 14,750 develop on angiosperms (Meyer, 1987). They are diverse and induced by a wide variety of insects (Dreger-Jauffret and Shorthouse, 1992; Knor et al., 2013). Galls (Cecidia) are formed by extensive modified growth of the plant tissue stimulated by