hymenobacter seoulensis hymenobacter seoulensis hymenobacter seoulensis is a gram-negative, aerobic, rod-shaped and non-motile bacterium from the genus of hymenobacter which has been isolated from water from a river. hymenobacter seoulensis scientific classification domain: bacteria phylum: bacteroidota class: cytophagia order: cytophagales family: hymenobacteraceae genus: hymenobacter species: h. seoulensis binomial name hymenobacter seoulensislee et al. 2017 type strain jcm 31655, kctc 52197, strain 16f7g