flaviflexus massiliensis flaviflexus massiliensis flaviflexus massiliensis is a bacterium from the genus of flaviflexus which has been isolated from the human gut. flaviflexus massiliensis scientific classification domain: bacteria phylum: actinomycetota class: actinomycetia order: actinomycetales family: actinomycetaceae genus: flaviflexus species: f. massiliensis binomial name flaviflexus massiliensistraore et al. 2016 type strain sit4