syntrophospora bryantii syntrophospora bryantii syntrophospora bryantii is a species of bacteria belonging to the family syntrophomonadaceae. it is the only described species in the genus syntrophospora and has been proposed to be a part of the genus syntrophomonas instead. syntrophospora bryantii scientific classification domain: bacteria phylum: bacillota class: clostridia order: eubacteriales family: syntrophomonadaceae genus: syntrophospora species: s. bryantii binomial name syntrophospora bryantii(stieb and schink 1985) zhao et al. 1990 synonyms clostridium bryantii "syntrophomonas bryantii"