limibaculum limibaculum limibaculum is a gram-negative genus of bacteria from the family of rhodobacteraceae with one known species (limibaculum halophilum). limibaculum halophilum has been isolated from mud. limibaculum scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: rhodobacterales family: rhodobacteraceae genus: limibaculumshin et al. 2017 type species limibaculum halophilum species l. halophilum