hymenobacter roseus hymenobacter roseus hymenobacter roseus is a gram-negative bacterium from the genus of hymenobacter which has been isolated from sand. hymenobacter roseus scientific classification domain: bacteria phylum: bacteroidota class: cytophagia order: cytophagales family: hymenobacteraceae genus: hymenobacter species: h. roseus binomial name hymenobacter roseussubhash et al. 2014 type strain kctc 42090, lmg 28260, jc245