Upper panels: comparison between our measurements of Lick line-strength indices and those available in literature (Tables 3 and A.1–A.4). For uniformity we only show literature sources that include multiple galaxies from our sample. The plot intervals reflect the ranges of values from our measurements. Bottom panels: difference between our heliocentric velocities and velocity dispersion in the central region of the sample galaxies and those from literature as a function of the literature values. The average difference of 39 measurements after removing three outliers is consistent with zero (−7 ± 29 km s⁻¹).