Phylogenetic analysis of partial 16S rRNA gene sequences of clones from aerobic (Co_Aer) and anaerobic (Co-Ana) consortium and related species using the Kimura 2p evolutionary model and the neighbor joining method for tree reconstruction. Bootstrap values (1000 replicate runs, shown as %) greater than 70% are listed. Numbers in brackets correspond to additional clones showing ≥ 97% similarity with the clone represented in the branch. GenBank accession numbers are listed after species names. Methanohalophilus portucalensis was used as the outgroup.