Extended Data Fig. 8: Phylogenetic relationships used in phylogeny-based phylosymbiosis tests.

Phylogenetic trees (topology only) among a, phyla investigated in this work³². b, families in Annelida;⁶⁷ c, families in Nematoda;⁶⁸ d, species in Astrotorhynchus⁶⁹. Mantel tests, results of which are shown under each panel, compare the phylogenetic topologies shown with similarity dendrograms of microbiomes from corresponding specimens, as shown in d. Microbiome data from specimens belonging to the same taxon (phylum, family, or species) were mapped in 0-branch lengths polytomies in each tree, as shown for Astrotorhynchus (numbers of specimens per polytomy are reported within dark triangles in a–c). All the performed analyses showed a very low degree of covariation (R value) between host phylogeny and microbiome similarity.