parabacteroides massiliensis parabacteroides massiliensis parabacteroides massiliensis is a bacterium from the genus of parabacteroides which has been isolated from human faeces. parabacteroides massiliensis scientific classification domain: bacteria phylum: bacteroidota class: bacteroidia order: bacteroidales family: "tannerellaceae" genus: parabacteroides species: p. massiliensis binomial name parabacteroides massiliensisbellali et al. 2019 type strain marseille-p2231