Table 4. Exclusion of parabasalian taxa and the effect on their root.

No. of parabasalian taxa excluded	23 outgroup taxa	13 outgroup taxa
3	10	NT
6	10	NT
12	10	10
16	4	8
18	5	6

Values represent the number of occurrences of root position k (shown in Figure 3) in 10 replicates of the random taxa exclusion analyses in each defined number of excluded taxa. NT, not tested. The 23 outgroup taxa correspond to the concatenate dataset of EF-1α, actin, and SSU rRNA gene sequences using 23 outgroup taxa as shown in Figure 3, whereas the 13 outgroup taxa correspond to those remained after excluding 10 long-branch outgroup taxa (as investigated in Table S1). Note that in the cases of 16 and 18 taxa exclusions, all other replicates demonstrated the root position at the branch leading to Trichonymphea (position g).