hymenobacter defluvii hymenobacter defluvii hymenobacter defluvii is a gram-negative, aerobic and non-motile bacterium from the genus of hymenobacter which has been isolated from a wastewater treatment facility in korea. hymenobacter defluvii scientific classification domain: bacteria phylum: bacteroidota class: cytophagia order: cytophagales family: hymenobacteraceae genus: hymenobacter species: h. defluvii binomial name hymenobacter defluviikang et al. 2018