sporacetigenium sporacetigenium sporacetigenium is a monotypic genus of bacteria in the family peptostreptococcaceae. the only described species is sporacetigenium mesophilum. sporacetigenium scientific classification domain: bacteria phylum: bacillota class: clostridia order: eubacteriales family: peptostreptococcaceae genus: sporacetigeniumchen et al. 2006 species: s. mesophilum binomial name sporacetigenium mesophilumchen et al. 2006