Differences in functional genomic content between the vesicomyid symbionts. The circular representations of the sequenced genomes of Ruthia magnifica (outer) and Vesicomyosocious okutanii (inner) are shown with functional differences between the symbionts colored based on role category. The C. kilmeri symbiont genome hybridized to all R. magnifica features and therefore is predicted to encode at least the genomic repertoire of R. magnifica. Genes putatively absent from the V. sp. mt-II symbiont genome based on hybridization to the R. magnifica microarray are marked in black. Regions conserved across all four symbiont genomes are highlighted in green.