anaerofilum anaerofilum acutalibacter is a gram-positive, strictly anaerobic, chemoorganotrophic, mesophilic and acidogenic genus of bacteria from the family of oscillospiraceae. anaerofilum scientific classification domain: bacteria phylum: bacillota class: clostridia order: eubacteriales family: oscillospiraceae genus: anaerofilumzellner et al. 1996 type species anaerofilum pentosovorans species a. agile a. pentosovorans