Figure 1
Phylogenetic tree highlighting (red) the position of four newly sequenced Bacteriovorax strains relative to the type strains within the family Bdellovibrionaceae and two non-type strains of each Bacteriovorax phylogenetic clusters. The tree was constructed using 16S rRNA gene sequences aligned by the RDP aligner, and was inferred using RaxML 7.25 [17] with the GTRGAMMA model of sequence evolution. The strains and their corresponding GenBank accession numbers for 16S rRNA genes were (type = T): Bacteriovorax sp. BSW11_IV; Bacteriovorax sp. SEQ25_V; Bacteriovorax sp. DB6_IX; Bacteriovorax sp. BAL6_X, Bdellovibrio bacteriovorus HD100T (BX842648); Bacteriolyticum stolpii UKi2T (AJ288899); Bacteriovorax marinus SJT (FQ312005); Peredibacter starrii A3.12T (AF084852); Bx litoralis JS5T (AF084859); Bdellovibrio exovorus JSST (EF687743); Bx sp. BB3 (DQ631715); Bx sp. OC71 (DQ536436); Bacteriovorax sp. PS23S (DQ631772); Bx sp. IHS11 (DQ631792); Bacteriovorax sp. SF11 (DQ631733); Bacteriovorax sp. ISRE1 (DQ631752); Bacteriovorax sp. GSL21 (DQ536437); Bacteriovorax sp. JDF1 (DQ631739); Bacteriovorax sp. MIA2 (DQ631695); Bacteriovorax sp. TRI41 (DQ631758); Bx sp. COCO1A (DQ631687); Bacteriovorax sp. WAIKIKKI (DQ631783); Bx sp. OC81 (DQ631721); Bacteriovorax sp. WAIKIKKI16 (DQ631770); Bacteriovorax sp. HAWAII2 (DQ631769); Bx sp. HAWAII5 (DQ631773). Deltaproteobacterium, Pelobacter carbinolicus DSM2380 (CP000142), was used as an out-group. The numbers along the branches reflect the proportion of times the groups cluster together based on 100 bootstrapped replicates. Thick branches represent those with greater than 75% bootstrap support. Phylogenetic clusters of Bacteriovorax based on 96.5% or greater 16S rRNA gene sequence similarity are denoted by brackets on the right of the tree. Clusters were numbered consistently with previous reports [9, 10, 18].