a) Misalignment respect to the normal (ψ₊) of the minor and major kinematic angles estimated for each galaxy directly from the measured radial velocities as a function of the integrated stellar masses for the CALIFA galaxies in the sample (Walcher et al. 2014). Labels indicate those objects with ψ₊> 20° degrees. Blue circles correpond to objects identified as galaxies in interaction (see Sect. 2.3 and Table A.1). b) Histogram of misalignment of the minor and major kinematic pseudo-axes respect to perpendicularity. The fraction of non-barred and barred galaxies is indicated as in Fig. 1. Colors indicate here the faction of galaxies in each bin and bar strength of the nuclear type of the galaxies (AGN+LINER or SF+INDEF). Numbers indicate the total number of objects in each bin, including the number of interacting galaxies in parentheses. c) Standard deviation of the positions used to estimate position angle of the minor kinematic axis for each galaxy as a function of the ellipticity. Blue dots correspond to interacting galaxies. Labels indicate those objects with δPA_minor> 30° degrees. d) Histogram of δPA_minor. Colors and filled lines indicate the same than in b).