sphingomonas lacus sphingomonas lacus sphingomonas lacus is a gram-negative, aerobic and motile bacteria from the genus of sphingomonas which has been isolated from soil near a pond in daejeon in korea. sphingomonas lacus produces astaxanthin-dideoxyglycoside. sphingomonas lacus scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: sphingomonadales family: sphingomonadaceae genus: sphingomonas binomial name sphingomonas lacuskim et al. 2015 type strain cect 8383, kctc 32458, pb304