anaerostipes anaerostipes anaerostipes is a gram positive and anaerobic bacterial genus from the family of lachnospiraceae. anaerostipes occurs in the human gut. anaerostipes may protect against colon cancer in humans by producing butyric acid. anaerostipes scientific classification domain: bacteria phylum: bacillota class: clostridia order: eubacteriales family: lachnospiraceae genus: anaerostipesschwiertz et al. 2002 type species anaerostipes caccae species a. butyraticus a. caccae a. hadrus a. rhamnosivorans