sphingomonas mucosissima sphingomonas mucosissima sphingomonas mucosissima is a gram-negative and non-motile bacteria from the genus of sphingomonas which has been isolated from soil crusts from the colorado plateau in the united states. sphingomonas mucosissima scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: sphingomonadales family: sphingomonadaceae genus: sphingomonas binomial name sphingomonas mucosissimareddy and garcia-pichel 2007 type strain atcc baa-1239, cip 110409, cp173-2, dsm 17494