terrisporobacter terrisporobacter terrisporobacter is a genus of gram-positive spore-forming bacteria in the family peptostreptococcaceae. members of this genus were once classified as clostridium until phylogenetic data revealed it should be a distinct genus. terrisporobacter scientific classification domain: bacteria phylum: bacillota class: clostridia order: eubacteriales family: peptostreptococcaceae genus: terrisporobactergerritsen et al. 2014 type species terrisporobacter glycolicus(gaston and stadtman 1963) gerritsen et al. 2014 species t. glycolicus t. hibernicus t. mayombei t. petrolearius