bacteroidaceae bacteroidaceae the bacteroidaceae are a family of environmental bacteria. bacteroides is common in the human gastrointestinal microbiotia. bacteroidaceae bacteroides biacutis anaerobically cultured in blood agar medium scientific classification domain: bacteria phylum: bacteroidota class: bacteroidia order: bacteroidales family: bacteroidaceaepribram 1933 (approved lists 1980) genera acetofilamentum dietrich et al. 1989 acetothermus dietrich et al. 1988 bacteroides castellani and chalmers 1919 (approved lists 1980) capsularis prévot 1938 (approved lists 1980) "desulfoarculus" schnell et al. 1991 "fusocillus" prevot 1938 "massilibacteroides" jneid et al. 2018 phocaeicola al masalma et al. 2009 "ristella" prevot 1938 "sphaerophorus" bergan and hovig 1968 "spherophorus" prevot 1938 synonyms "ristellaceae" prevot 1938 "spherophoraceae" prevot 1938