Normalized cumulative distribution in isochronal age of clustered stars from the various subregions highlighted in Fig. 19 (red = Spokes, black = Cone (C), blue = Cone (H), green = S Mon). The number of stars included in each subregion is reported between square brackets. The underlying cumulative distribution in fuchsia corresponds to the population of M-type clustered stars located outside the S Mon+Cone region. Marigo et al.’s (2017) PARSEC-COLIBRI stellar isochrones were adopted to sort our clustered population of M-type stars into age groups, using a binning of 0.25 Myr below 2 Myr, a binning of 0.5 Myr between 2 and 8 Myr, and a binning of 1 Myr for later ages. The gray dotted line indicates the position of the median value in each cumulative distribution.