Currently, there is no official classification of Bacteria and Archaea available. Many bacteriologists think that Bergey’s Manual represents the official classification but this is a misunderstanding. The editors of Bergey’s Manual try to provide a classification that is as accurate and up-to-date as possible but it is not official, in contrast to bacterial nomenclature where each taxon has one valid name. The closest to an official classification system is the one that is widely accepted by the community.