peptococcaceae peptococcaceae the peptococcaceae are a family of bacteria in the order clostridiales. peptococcaceae desulforudis audaxviator scientific classification domain: bacteria phylum: bacillota class: clostridia order: clostridiales family: peptococcaceaerogosa, 1971 genera anaerospora carboxydothermus cryptanaerobacter dehalobacter desulfitobacterium desulfonispora desulfosporosinus desulfotomaculum pelotomaculum peptococcus syntrophobotulus thermincola thermoterrabacterium