Figure 2.

Phylogenetic tree highlighting the position of P. limnophilus Mü 290^T relative to the type strains of the other species within the genus and to the type strains of the other genera within the family Planctomycetaceae. The tree was inferred from 1,336 aligned characters [27,28] of the 16S rRNA gene sequence under the maximum likelihood criterion [29] and rooted in accordance with the current taxonomy [30]. The branches are scaled in terms of the expected number of substitutions per site. Numbers above branches are support values from 1,000 bootstrap replicates [31] if larger than 60%. Lineages with type strain genome sequencing projects registered in GOLD [32] are shown in blue, published genomes in bold, e.g. the recently published GEBA genome of Pirellula staleyi [33]. 16S rRNA gene sequences are not available for strains of the species P. bekefii, P. guttaeformis or P. stranskae, all of which are typified by descriptions and were initially described as fungi [1,7]. The name P. gracilis was also initially described as a fungus, but the name has not been validly published under the Bacteriological Code. Starr et al. [34] considered this organism not be to a planctomycete.