ancylobacter defluvii ancylobacter defluvii ancylobacter defluvii is a bacterium from the family of xanthobacteraceae. ancylobacter defluvii scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: xanthobacteraceae genus: ancylobacter species: a. defluvii binomial name ancylobacter defluviiporoshina et al. 2014 type strain s15, sk15