ponticoccus lacteus ponticoccus lacteus ponticoccus lacteus is a gram-negative, aerobic, rod-shaped and non-motile bacterium from the genus ponticoccus which has been isolated from surface seawater from the south china sea. ponticoccus scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: rhodobacterales family: rhodobacteraceae genus: ponticoccus species: p. lacteus binomial name ponticoccus lacteusyang et al. 2015 type strain cgmcc 1.12986, jcm 30379, jl351