Fig. 7

Ancestral state reconstruction of habitats. Marginal probabilities were calculated based on the habitat states using the Mk1 and Asymm.2 probability models of ML ancestral states. Leaf nodes of the phylogenetic tree based on 291 OGs are colored by the habitat sources as follows: purple, sponge; yellow, free-living environment, and the colors of internal nodes are displayed in proportion to probability. The MRCA node of UBA5794 is marked with a solid star. Probability of the MRCA is shown in the top right of corresponding nodes