sphingomonas jejuensis sphingomonas jejuensis sphingomonas jejuensis is a gram-negative, rod-shaped and non-motile bacteria from the genus of sphingomonas which has been isolated from the sponge hymeniacidon flavia near the jeju island in korea. sphingomonas jejuensis scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: sphingomonadales family: sphingomonadaceae genus: sphingomonas binomial name sphingomonas jejuensispark et al. 2012 type strain kctc 23321, nbrc 107775, ms-31