sphingomonas astaxanthinifaciens sphingomonas astaxanthinifaciens sphingomonas astaxanthinifaciens is a bacterium from the genus of sphingomonas which has been isolated from fresh water in misasa in japan. sphingomonas astaxanthinifaciens has the ability to produce astaxanthin. sphingomonas astaxanthinifaciens scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: sphingomonadales family: sphingomonadaceae genus: sphingomonas binomial name sphingomonas astaxanthinifaciensasker et al. 2008 type strain ccug 53608, nbrc 102146, tdma-17