arenimonas caeni arenimonas caeni arenimonas caeni is a gram-negative, rod-shaped, non-spore-forming and motile bacterium from the genus of arenimonas which has been isolated from activated sludge from wuhu in china. arenimonas caeni scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: xanthomonadales family: xanthomonadaceae genus: arenimonas species: a. caeni binomial name arenimonas caeniliu et al. 2018 type strain cctcc ab 2017067, jcm 32091, strain z29