Left panel: stellar mass derived through the fit of the multiband photometry (used in this paper, M_⋆,photo) vs. that obtained fitting the spectral indices (M_⋆,index, Kauffmann et al. 2003) for local ETGs at 0.05 <z< 0.1 (light grey points). Black solid line is the 1:1 correlation, while red line is the best-fit relation and red-dotted curves are the 3σ lines. All of the points at >3σ are indicated as open squares. Among these outliers, blue squares are those with M_⋆> 10¹¹M_⊙, and Σ > 2500 M_⊙ pc^-2, i.e. nominally included in local sample of ultramassive dense local ETGs. Dark grey points are the remaining part of the ultramassive dense local ETGs. Central panel: the measured velocity dispersion (σ_dr7) vs. the velocity dispersion derived from the virial theorem assuming the M_⋆,photo values as mass (σ_vir,photo). Right panel: the same of central panel but with σ_vir derived assuming the M_⋆,index values.