arenibacterium arenibacterium arenibacterium is a bacterial genus from the family rhodobacteraceae. arenibacterium scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: rhodobacterales family: rhodobacteraceae genus: arenibacteriumbaek et al. 2020 type species arenibacterium halophilum species a. arenosum a. halophilum