SSFR-mass relation for the ELOX galaxies at 0.5 <z< 0.62 (panels a) and c)) and at 0.62 <z< 0.75 (panels b) and d)), with the lower panels showing only galaxies with T2 (disk) morphologies. Open circles depict the mean (color-coded as in Fig. 4) metallicity data of ELOX galaxies at the position of grid points with at least three ELOX galaxies within ± 0.05 dex in logSFR and logM from the SSFR and mass values of the respective grid point. It seems that the SFR is a second parameter in the MZR of the zCOSMOS sample at 0.5 <z< 0.75, because galaxies with higher (S)SFRs generally also have lower metallicities.