mesohalobacter mesohalobacter mesohalobacter is a gram-negative and non-motile genus of bacteria from the family of flavobacteriaceae with one known species (mesohalobacter halotolerans). mesohalobacter scientific classification domain: bacteria phylum: bacteroidota class: flavobacteria order: flavobacteriales family: flavobacteriaceae genus: mesohalobacterfeng et al. 2020 type species mesohalobacter halotolerans species m. halotolerans