Notes. Column 1: catalogue and sub-catalogue name. These are listed in priority order, essentially following that defined for MCXC. Column 2: reference and corresponding VizieR table. Columns 3-5: number of clusters at the different steps of the meta-catalogue construction. Column 3: number of clusters in the published (sub-)catalogue table. Column 4: number of clusters after merging of sub-catalogues and removal of false clusters or those without redshift. The origin of the difference between N_cat and N_in is given in the footnote. N_in may differ from the values given by Piffaretti et al. (2011) following the revision described Sect. 2.2. Column 5: N_MCXC is the number of clusters in MCXC-II after handling multiple entries between catalogues, i.e. whose parameters are derived from this source. ^(a) Three duplicates of NORAS clusters were removed by P11 when merging NORAS and REFLEX catalogues. ^(b) Ten REFLEX cluster duplicates were removed by P11 when merging the NORAS and REFLEX catalogues, in addition to two Virgo galaxies. Two clusters identified as false and one still without redshift were removed after the present revision (see Sect. 2.2.1).^(c) The 160SD table includes 22 objects flagged as likely false detections, and one for which the optical follow-up was not possible. The present work confirms and provides redshift for five objects (see Sect. 2.2.4). The other 18 objects were removed, in addition to one further cluster later invalidated by Burenin et al. (2007).^(d) MCXC J1332.7+5032 appears both in BCS and eBCS and was removed by P11.^(e) Ten clusters without redshift were removed after the present revision (Sect. 2.2.2). ^(f) One cluster without redshift was removed after the present revision (Sect. 2.2.3).^(𝑔) EMSS_2004 is the ASCA follow-up of 23 clusters in the original EMSS_1994 catalogue. MS1208.7 and MS0147.8, which do not have luminosity measurements, were removed by P11. The remaining 21 EMSS_2004 clusters were removed by P11 from the EMSS_1994 catalogue, in addition to three further clusters, following Henry 2004. ^(h) RXGCC 908, a point source in the XMM-Newton archive observation, was removed.