cognatiyoonia sediminum cognatiyoonia sediminum cognatiyoonia sediminum is a gram-negative, strictly aerobic and short rod-shaped bacterium from the genus of cognatiyoonia which has been isolated from marine sediments from the northern okinawa trough in china. cognatiyoonia sediminum scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: rhodobacterales family: rhodobacteraceae genus: cognatiyoonia species: c. sediminum binomial name cognatiyoonia sediminum(liang et al. 2015)wirth and whitman 2018 type strain dsm 28715, mccc 1k00257, strain s3b03 synonyms loktanella sediminum