Figure 4
Heatmap and hierarchical clustering of pairwise comparison of bone sample spectra. Symmetric heat map of similarity ratios between all bones. Darker red indicates greater similarities between samples, light yellow indicates samples with a few or no spectra in common. Importantly, sample clustering coincides, for the most part, with evolutionarily similar taxa as seen in the dendrogram and taxa color-coded bar at top of figure. On the right axis the total number of spectra for each sample is listed along with common and Latin names of species, or most specific known taxa, indicated by * (see “Methods” for details).
