planktosalinus planktosalinus planktosalinus is a gram-negative, strictly heterotrophic and aerobic genus of bacteria from the family of flavobacteriaceae with one known species (planktosalinus lacus). planktosalinus lacus has been isolated from the lake xiaochaidan in china. planktosalinus scientific classification domain: bacteria phylum: bacteroidota class: flavobacteria order: flavobacteriales family: flavobacteriaceae genus: planktosalinuszhong et al. 2016 type species planktosalinus lacus species p. lacus