pelagibacterium pelagibacterium pelagibacterium is a bacteria genus from the family hyphomicrobiaceae. pelagibacterium scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: devosiaceae genus: pelagibacteriumxu et al. 2011 type species pelagibacterium halotoleran species p. halotolerans p. lixinzhangensis p. luteolum p. nitratireducens