Subject	Ecotoxicology, Ecology, Biological Sciences
Specific subject area	Elemental composition, Saproxylic beetles
Type of data	Tables and Figures
How data was acquired	Through field work and laboratory work
Data format	Raw, filtered and analysed
Parameters for data collection	Investigation of abdomens (n = 124) and elytra (n = 271) of adult Stag Beetles collected at 28 localities situated in eight European countries from Central Spain to Western Russia.
Description of data collection	The measurement of concentrations of 12 chemical elements (Ca, Mg, K, Na, Mn, Fe, Zn, Cu, As, Cd, Pb and Ni), and relating these to insect size and local habitat conditions.
Data source location	Institution: Research Station of the Institute of the Agricultural and Forest Environment, Polish Academy of Sciences City/Town/Region: Turew, Wielkopolska Country: Poland
Data accessibility Related research article	All raw data are given along with the article as Appendix 1. G. Orłowski, L. Mróz, M. Kadej, A. Smolis, D. Tarnawski, J. Karg, A. Campanaro, M. Bardiani, D. J. Harvey, M. Méndez, A. Thomaes, A. Vrezec, K. Ziomek, A. L. Rudecki, D. Mader, Breaking down insect stoichiometry into chitin-based and internal elemental traits: Patterns and correlates of continent-wide intraspecific variation in the largest European saproxylic beetle. Environ. Poll. 262, 2020, 114,064.