barnesiella intestinihominis barnesiella intestinihominis barnesiella intestinihominis is a gram-negative, anaerobic and non-spore-forming bacterium from the genus of barnesiella which has been isolated from human feces in tokyo, japan. barnesiella intestinihominis scientific classification domain: bacteria phylum: bacteroidota class: bacteroidia order: bacteroidales family: barnesiellaceae genus: barnesiella species: b. intestinihominis binomial name barnesiella intestinihominismorotomi et al. 2008 type strain dsm 21032, jcm 15079, yit 11860