mucilaginibacter gracilis mucilaginibacter gracilis mucilaginibacter gracilis is a gram-negative, facultatively aerobic, heterotrophic and non-motile bacterium from the genus of mucilaginibacter which has been isolated from sphagnum peat bog in the tomsk region in russia. mucilaginibacter gracilis scientific classification domain: bacteria phylum: bacteroidota class: sphingobacteriia order: sphingobacteriales family: sphingobacteriaceae genus: mucilaginibacter species: m. gracilis binomial name mucilaginibacter gracilispankratov et al. 2007 type strain atcc baa-1391, dsm 18602, tpt18, vkm b-2447