pseudomonas cedrina pseudomonas cedrina pseudomonas cedrina is a gram-negative, rod-shaped bacterium isolated from spring waters in lebanon. based on 16s rrna analysis, p. cedrina has been placed in the p. fluorescens group. pseudomonas cedrina scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: pseudomonadales family: pseudomonadaceae genus: pseudomonas species: p. cedrina binomial name pseudomonas cedrinacorrig. dabboussi, et al., 1999 type strain cip 105541 synonyms pseudomonas cedrella dabboussi, et al., 1999