catonella catonella catonella is a gram-negative, obligately anaerobic, non-spore-forming and non-motile bacterial genus from the family of lachnospiraceae with one known species (catonella morbi). catonella morbi occur in the gingival crevice of humans. catonella scientific classification domain: bacteria phylum: bacillota class: clostridia order: eubacteriales family: lachnospiraceae genus: catonellamoore and moore 1994 type species catonella morbi species c. morbi