hespellia hespellia hespellia is a gram-positive, strictly anaerobic, non-spore-forming and non-motile genus from the family of lachnospiraceae. hespellia scientific classification domain: bacteria phylum: bacillota class: clostridia order: eubacteriales family: lachnospiraceae genus: hespelliawhitehead et al. 2004 type species hespellia stercorisuis species h. porcina h. stercorisuis