Figure 8: The Kormendy relation for bulges of S0, early-type and late-type spirals. In all panels the full line represents the KR of elliptical galaxies in the Coma cluster. The dotted black line corresponds to the extension of the KR of ellipticals towards galaxies with smaller effective radius. The red dashed line of the upper panel represents the KR for the S0 bulges. The red and green dashed lines in the lower panel show the KR for S0 bulges brighter and fainter than , respectively. Credit: Laurikainen et al. [21]. Reproduced by permision from WILEY.