nioella sediminis nioella sediminis nioella sediminis is a gram-negative, short-rod-shaped and non-motile bacterium in the genus nioella which has been isolated from sediments from the jiulong river, china. nioella sediminis scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: rhodobacterales family: rhodobacteraceae genus: nioella species: n. sediminis binomial name nioella sediminisliu et al. 2017 type strain kctc 42144, mccc 1a00710, strain js7-11