butyrivibrio hungatei butyrivibrio hungatei butyrivibrio hungatei is a species of gram-negative, anaerobic, non-spore-forming, butyrate-producing bacteria. it is curved rod-shaped and motile by means of single polar or subpolar flagellum and is common in the rumen. its type strain is jk 615t (=dsm 14810t =atcc baa-456t). butyrivibrio hungatei scientific classification domain: bacteria phylum: bacillota class: clostridia order: eubacteriales family: lachnospiraceae genus: butyrivibrio species: b. altitudinis binomial name butyrivibrio hungateikopecný et al. 2003