pseudaeromonas paramecii pseudaeromonas paramecii pseudaeromonas paramecii is a gram-negative, rod-shaped and motile bacterium from the genus of pseudaeromonas which has been isolated from the ciliate paramecium caudatum. pseudaeromonas paramecii scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: aeromonadales family: aeromonadaceae genus: pseudaeromonas species: p. paramecii binomial name pseudaeromonas parameciiakter and shin 2018 type strain jcm 32226, kctc 62038, strain pcs8