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. 2015 Dec 28;10(12):e0144307. doi: 10.1371/journal.pone.0144307

Fig 2. Phylogeny of symbiotic OTUs (16S rRNA) in the context of related chemosynthetic bacteria.

Fig 2

Tree is based on partial sequences from the hypervariable V5-V6 region of 16S rRNA encoding-gene. Collapsed nodes of other chemosymbiotic bivalves only contain a subset of published symbionts, for clarity. Tree is rooted to the Bacteroidetes symbionts found in Idas modiolaeformis previously but not in the current study. OTU colour coding corresponds to Fig 3. Environmental context relates to corresponding sequence records, not the host species in general (EM- East Mediterranean Sea; EPR- East Pacific Rise; MAR- Mid-Atlantic Ridge; NEA- Northeast Atlantic; NEP- Northeast Pacific; NWA- Northwest Atlantic; NWP- Northwest Pacific; SEA- Southeast Atlantic; SWP- Southwest Pacific; WM- West Mediterranean; see legend for habitat). A.- Adipicola; B.- Bathymodiolus; I.- Idas; G.- Gladius; V.- Vulcanidas. Dagger- and asterisk-marked sequences are the known symbiont sequences from I. simpsoni and I. modiolaeformis respectively (includes this study).