runella limosa runella limosa runella defluvii is a gram-negative, rod-shaped, strictly aerobic and non-motile bacterium from the genus of runella which has been isolated from activated sludge in korea. runella limosa scientific classification domain: bacteria phylum: bacteroidota class: cytophagia order: cytophagales family: spirosomaceae genus: runella species: r. limosa binomial name runella limosaryu et al. 2006 type strain dsm 17973, emb111, kctc 12615