oxalophagus oxalicus oxalophagus oxalicus oxalophagus oxalicus, previously known as clostridium oxalicus, is a bacterium in the family of paenibacillaceae. oxalophagus oxalicus scientific classification domain: bacteria phylum: bacillota class: bacilli order: bacillales family: paenibacillaceae genus: oxalophagus species: o. oxalicus binomial name oxalophagus oxalicus(dehning and schink 1990) collins et al. 1994 synonyms clostridium oxalicum