This sheet contains histometrical data obtained from transverse-sectioned galls induced by Eucecidoses minutanus (Cecidosidae) on Schinus polygamus (Anacardiaceae). Data were obtained from galls with distinct insect instars and then they were indexed according the instar occupying the gall. The measurements (thickness, cell area) were obtained from photomicrographs in the software AxioVision Rel 4.8 (Carl Zeiss Micro Imaging, Jena, Germany). The average thickness of the gall wall and each tissue measured was obtained from 5 distinct transverse sections per sample. The average cell area of epidermis, outer gall parenchyma, and nutritive tissue were obtained from 5 measured cells per tissue per section, considering that 5 sections were obtained from each sample. Therefore, 25 cells were measured to obtain the average cell area per tissue per sample. These data were analyzed and included in an manuscript submitted for publication in American Journal of Botany, DOI: 10.1002/ajb2.1798, entitled "Complex meristematic activity induced by Eucecidoses minutanus on Schinus engleri turns shoots into galls". Observations in this sheet: * Average values obtained from 5 distinct sections per sample (refers to gall wall thickness and tissue thickness in µm). ** Average values obtained from 25 distinct cells per sample in each tissue (5 cells per section x 5 sections per sample) (refers to cell area in µm²); *** Thickness of the transverse-sectioned vascular bundles (refers to vascular bundle thickness).

* Average values obtained from 5 distinct sections per sample (refers to gall wall thickness and tissue thickness in µm). ** Average values obtained from 25 distinct cells per sample in each tissue (5 cells per section x 5 sections per sample) (refers to cell area in µm²); *** Thickness of the transverse-sectioned vascular bundles (refers to vascular bundle thickness).