hymenobacter ruber hymenobacter ruber hymenobacter ruber is a gram-negative, aerobic, non-spore-forming, rod-shaped and non-motile bacterium from the genus of hymenobacter which has been isolated from grass soil. hymenobacter ruber scientific classification domain: bacteria phylum: bacteroidota class: cytophagia order: cytophagales family: hymenobacteraceae genus: hymenobacter species: h. ruber binomial name hymenobacter ruberjin et al. 2014 type strain pb156, jcm 19433, kctc 32477