polynucleobacter sinensis polynucleobacter sinensis polynucleobacter sinensis is an aerobic, chemo-organotrophic, catalase- and oxidase-positive, free-living bacterium of the genus polynucleobacter, isolated from a freshwater pond in china. the species represents planktonic bacteria (bacterioplankton) dwelling in non-acidic freshwater systems. the species name refers to the origin of the type strain from china. polynucleobacter duraquae scientific classification domain: bacteria phylum: pseudomonadota class: betaproteobacteria order: burkholderiales family: burkholderiaceae genus: polynucleobacter species: p. sinensis binomial name polynucleobacter siensishahn et al. 2016 type strain mwh-huw1 synonyms p. necessarius subsp. asymbioticus, polynucleobacter sp. mwh-huw1