''Porphyromonas bennonis'' is a

Gram-negative Gram-negative bacteria are bacteria that do not retain the crystal violet stain used in the Gram staining method of bacterial differentiation. They are characterized by their cell envelopes, which are composed of a thin peptidoglycan cell wall ...

anaerobic Anaerobic means "living, active, occurring, or existing in the absence of free oxygen", as opposed to aerobic which means "living, active, or occurring only in the presence of oxygen." Anaerobic may also refer to: * Anaerobic adhesive, a bonding a ...

and non-spore-forming bacterium from the genus of

Porphyromonas ''Porphyromonas'' is a Gram-negative, non-spore-forming, obligately anaerobic and non-motile genus from the family of Porphyromonadaceae. There were 16 different Porphyromonas species documented as of 2015 which reside in both animal and human r ...

which has been isolated from human clinical specimens.

References

Bacteroidia Bacteria described in 2009 {{Bacteroidetes-stub