pontixanthobacter aestiaquae pontixanthobacter aestiaquae pontixanthobacter aestiaquae is a gram-negative bacterium from the genus pontixanthobacter which has been isolated from seawater from the yellow sea in korea. pontixanthobacter aestiaquae scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: sphingomonadales family: erythrobacteraceae genus: pontixanthobacter species: p. aestiaquae binomial name pontixanthobacter aestiaquae(jung et al. 2014) xu et al. 2020 type strain hdw-31, cect 8527, kctc 42006 synonyms altererythrobacter aquiaestus altererythrobacter aestiaquae jung et al. 2014