The galls induced by Neolithus fasciatus Scott, 1882, are globoid, intralaminar and occur on both sides of the host plant leaves (Fig. 1B, C).

The mature galls of Sapium glandulosum with the presence of Neolithus fasciatus have a single nymphal chamber and uniseriate epidermis, with tabular cells, covered by a thin cuticle and rare stomata (Fig. 2A). The cortex is parenchymatic, with outer layers with large cells, chloroplasts, and intercellular spaces (Fig. 2A). The innermost cells of the cortex have smaller cells and are compact (Fig. 2A). The vascular bundles are collateral and occur in the middle regions of the cortex and are hypertrophied (Fig. 2B). The innermost cells of the cortex have a voluminous vacuole with evident nuclei (Fig. 2C).