stomatobaculum stomatobaculum stomatobaculum is an anaerobic bacterial genus from the family of lachnospiraceae with one known species (stomatobaculum longum). stomatobaculum longum has been isolated from the human dental plaque. stomatobaculum scientific classification domain: bacteria phylum: bacillota class: clostridia order: eubacteriales family: lachnospiraceae genus: stomatobaculumsizova et al. 2013 type species stomatobaculum longum species s. longum