ponticaulis koreensis ponticaulis koreensis ponticaulis koreensis is a gram-negative, aerobic, obligately halophilic, chemoorganotrophic and motile bacterium from the genus of ponticaulis which has been isolated from seawater from the coast of jeju in korea. ponticaulis koreensis scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: caulobacterales family: hyphomonadaceae genus: ponticaulis species: p. koreensis binomial name ponticaulis koreensiskang and lee 2009 type strain gsw-23