roseomonas alkaliterrae roseomonas alkaliterrae roseomonas alkaliterrae is a species of gram negative, strictly aerobic, coccobacilli-shaped, pink-colored bacteria. it was first isolated from the soil around a geothermal hot spring in tengchong, china. the species name refers to the alkaline soil from which the species was first isolated. roseomonas alkaliterrae scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: rhodospirillales family: acetobacteraceae genus: roseomonas species: r. alkaliterrae binomial name roseomonas alkaliterraedong 2014 the optimum growth temperature for r. alkaliterrae is 40-50 °c, but can grow in the 5-50 °c range. the optimum ph is 8.0-10.0, and can grow in ph 6.0-11.0.