Evolution of bulge-dominated phase in the two first-ranked galaxies in CGs as a function of the CG assembly channel. Left plot: Time evolution of the median bulge-to-total stellar mass ratio for the ranked galaxies in CGs. Error bars are the 95% confidence interval for the medians, $\pm 1.58\mathrm{IQR}/\sqrt{N}$, with IQR the interquartile range (Chambers et al. 1983). These error bars are included only for the seek of comparisons between medians and are not representative of the distribution of values around the medians. The dashed horizontal line at 0.7 indicates the transition to a bulge-dominated (elliptical) morphology. Right plot: Time evolution of the fraction of CGs with bulge-dominated ranked galaxies. Error bars are 95% binomial confidence interval, $\pm 1.96\sqrt{f(1-f)/N}$, with f as the fraction.