Fig. 8: Principal components analysis (PCA) plot of ancient and modern human and non-human primate oral microbiomes based on all species detected, not just Streptococcus.

Shapes indicate sample host, colored by proportion of reads in each clade out of all Streptococcus reads: A Sanguinis clade, B Anginosus clade, C Mitis clade, D Mutans clade, E Other clades, F Unknown clades.