Figure 1.

Phylogenetic tree highlighting the position of I. polytropus CuHbu1^T relative to the other type strains within the family Fusobacteriaceae. The tree was inferred from 1,399 aligned characters [7,8] of the 16S rRNA gene sequence under the maximum likelihood criterion [9] and rooted in accordance with the current taxonomy. The branches are scaled in terms of the expected number of substitutions per site. Numbers above branches are support values from 900 bootstrap replicates [10] if larger than 60%. Lineages with type strain genome sequencing projects registered in GOLD [11] are shown in blue, published genomes in bold [12–15]. Note that Ilyobacter appears as polyphyletic in the tree [16], but none of the relevant branches obtains any bootstrap support. Thus, the current classification is not in significant conflict with our phylogenetic analysis.