polynucleobacter aenigmaticus polynucleobacter aenigmaticus polynucleobacter aenigmaticus is an aerobic, facultatively anaerobic, chemo-organotrophic, non-motile, free-living bacterium of the genus polynucleobacter. polynucleobacter aenigmaticus scientific classification domain: bacteria phylum: pseudomonadota class: betaproteobacteria order: burkholderiales family: burkholderiaceae genus: polynucleobacter species: p. aenigmaticus binomial name polynucleobacter aenigmaticushahn et al. 2017 type strain mwh-k35w1 =dsm 24006 =lmg 29706 synonyms polynucleobacter necessarius subsp. asymbioticus mwh-k35w1, polynucleobacter sp. mwh-k35w1, strain mwh-k35w1 the type strain was isolated from a small alkaline lake located in austria. this strain differers from other polynucleobacter type strains due to its origin from a deep anoxic water layer. the genome sequence of the strain was fully determined., the type strain dwells as a free-living, planktonic bacterium in the water column of the lake, thus is part of freshwater bacterioplankton.