roseomonas terrae roseomonas terrae roseomonas terrae is a species of gram negative, strictly aerobic, coccobacilli-shaped, pale yellow to pale pink-pigmented bacterium. it was first isolated from a soil sample collected from the island of liancourt rocks in south korea. the new species name was first proposed in 2007 and derives from latin terrae (of the soil). roseomonas terrae scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: rhodospirillales family: acetobacteraceae genus: roseomonas species: r. terrae binomial name roseomonas terraeyoon 2007 the optimum growth temperature for r. terrae is 25 °c, but can grow in the 10-36 °c range. the optimum ph is 7.0-8.0, and can grow in ph 5.5-10.5.