peptoclostridium peptoclostridium peptoclostridium is a genus in family of peptostreptococcaceae. peptoclostridium scientific classification domain: bacteria phylum: bacillota class: clostridia order: eubacteriales family: peptostreptococcaceae genus: peptoclostridiumgalperin et al. 2016 type species peptacetobacter hominis species peptoclostridium acidaminophilum peptoclostridium litorale before assigned to the genus as currently defined, the name was previously proposed in 2013 as a novel genus hosting c. difficile as peptoclostridium difficile, before that species was validly moved to the related genus clostridioides in 2016.