Three possible views of the phylogenetic tree for the full sample of galaxies. Left: tree with the group definition. Only groups with more than 50 galaxies are considered for this tree in this paper. The tree has been rooted with the group (at the top) with low values of B − V, n_V and log(M^*). Middle: unrooted tree. Right: tree with the proportion of cluster galaxies within each of the 300 pre-clusters indicated by the length of segments.