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16S rDNA maximum likelihood tree (based on 100 bootstrap replications). The tree was searched using RAxML-VIHPC version 4.0.0 (Stamatakis, 2007). RAxML executed 100 rapid bootstrap inferences and thereafter a thorough ML search with GTR model of nucleotide substitution. All free model parameters was estimated by RaxML. Bar, 0.01 change per nucleotide position.
