galactobacter galactobacter galactobacter is a gram-positive and rod-shaped genus of bacteria from the family micrococcaceae. galactobacter scientific classification domain: bacteria phylum: actinomycetota class: actinomycetia order: micrococcales family: micrococcaceae genus: galactobacterhahne et al. 2019 type species galactobacter caseinivoranshahne et al. 2019 species g. caseinivorans hahne et al. 2019 g. valiniphilus hahne et al. 2019