cognatiyoonia cognatiyoonia cognatiyoonia is a genus of bacteria from the family of rhodobacteraceae. cognatiyoonia scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: rhodobacterales family: rhodobacteraceae genus: cognatiyooniawirth and whitman 2018 type species cognatiyoonia koreensis species c. koreensis c. sediminum