brevifollis brevifollis brevifollis is a gram-negative genus of bacteria from the family of verrucomicrobiaceae with one known species (brevifollis gellanilyticus). brevifollis scientific classification domain: bacteria phylum: verrucomicrobiota class: verrucomicrobiae order: verrucomicrobiales family: verrucomicrobiaceae genus: brevifollisotsuka et al. 2013 type species brevifollis gellanilyticus species b. gellanilyticus