caenibius tardaugens caenibius tardaugens caenibius tardaugens is an oestradiol-degrading bacterium from the family hyphomicrobiaceae which has been isolated from activated sludge from a sewage treatment plant in japan. caenibius tardaugens scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: hyphomicrobiaceae genus: caenibiushördt et al. 2020 species: c. tardaugens binomial name caenibius tardaugens(fujii et al. 2003) hördt et al. 2020 type strain atcc baa-531, ifo 16725, jcm 11434, nbrc 16725, ari-1 synonyms novosphingobium tardaugens fujii et al. 2003