The observed FCGs on the fundamental plane. The solid line shows the best-fit FP from Bernardi et al. (2003b) obtained from ~9000 early-type galaxies in the SDSS in the redshift range 0.01 ≤ z ≤ 0.3 while the dotted lines present the 3σ deviations from the fit. Error bars for effective radii and surface brightness were determined with GALFIT while velocity dispersion errors were estimated with ULySS.