alistipes indistinctus alistipes indistinctus alistipes indistinctus is a gram-negative, anaerobic, non-spore-forming and non-motile bacterium from the genus of alistipes which has been isolated from human faeces from tokyo in japan. alistipes indistinctus scientific classification domain: bacteria phylum: bacteroidota class: bacteroidia order: bacteroidales family: rikenellaceae genus: alistipes species: a. indistinctus binomial name alistipes indistinctusnagai et al. 2010 type strain dsm 22520, jcm 16068, yit 12060