gramella salexigens gramella salexigens gramella salexigens is a gram-negative, aerobic and non-spore-forming bacterium from the genus of gramella which has been isolated from water from hwajinpo in korea. gramella salexigens scientific classification domain: bacteria phylum: bacteroidota class: flavobacteriia order: flavobacteriales family: flavobacteriaceae genus: gramella species: g. salexigens binomial name gramella salexigensshin et al. 2018 type strain hjm-19