rheinheimera hassiensis rheinheimera hassiensis rheinheimera hassiensis is a gram-negative, rod-shaped and aerobic bacterium from the genus of rheinheimera which has been isolated from the rhizosphere of the plant hordeum secalinum from a salt meadow near münzenberg in germany. rheinheimera hassiensis scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: chromatiales family: chromatiaceae genus: rheinheimera species: r. hassiensis binomial name rheinheimera hassiensissuarez et al. 2014 type strain kacc 17070, lmg 27268, strain e48