FIG. 4.

Neighbor-joining tree for human oral taxa in the phyla Actinobacteria and Fusobacteria. Labeling and methods used are as described in Fig. 1. Major clades are marked as follows: encircled “1,” phylum Actinobacteria; encircled “2,” order Actinomycetales; encircled “3,” order Bifidobacteriales; encircled “4,” order Coriobacteriales; and encircled “5,” phylum Fusobacteria.