gordonia sihwensis gordonia sihwensis gordonia sihwensis is a gram-positive and nitrate-reducing bacterium from the genus of gordonia which has been isolated from an autotrophic denitrification reactor in sihwa in korea. gordonia sihwensis scientific classification domain: bacteria phylum: actinomycetota class: actinomycetia order: mycobacteriales family: gordoniaceae genus: gordonia species: g. sihwensis binomial name gordonia sihwensiskim et al. 2003 type strain bcrc 16380, ccrc 16380, cip 108158, dsm 44576, ifm 10619, jcm 13435, kaist, nrrl b-24155, spr2