Figure 3

Influence of removing increasing proportions of fast-evolving sites in the amino acid data set on the robustness of the nodes supporting the Chlorokybus + Mesostigma clade and the three possible positions identified for this clade. A series of data sets lacking 10% to 90% of the 4,179 phylogenetically informative sites present in the original data set analyzed in Figure 2A were subjected to phylogenetic analyses. (A) Fluctuations of bootstrap values for the node supporting the Chlorokybus + Mesostigma clade in ML (left side) and MP (right side) analyses. (B) Fluctuations of bootstrap values for the nodes supporting the T1, T2 and T3 placement of the Chlorokybus + Mesostigma clade in ML (left side) and MP (right side) analyses. The three topologies tested are colour-coded as follows: red, T1 topology, i.e. the placement of the clade before the divergence of the Streptophyta and Chlorophyta; blue, T2 topology, i.e. the placement of the clade as sister to the Streptophyta; and green, T3 topology, i.e. the placement of the clade as sister to the Chlorophyta. (C) Fluctuations in the number of characters supporting unambiguously each of the three topologies identified for the Chlorokybus + Mesostigma clade. The topologies are colour-coded as in (B).