peptoniphilus coxii peptoniphilus coxii peptoniphilus coxii is a bacterium from the genus of peptoniphilus which has been isolated from human infections. peptoniphilus coxii scientific classification domain: bacteria phylum: bacillota class: clostridia order: eubacteriales family: peptoniphilaceae genus: peptoniphilus species: p. coxii binomial name peptoniphilus coxiicitron et al. 2013 type strain atcc baa-2106, ccug 59622, jcm 16892, rma 16757