Description of Massilia rubra sp. nov., Massilia aquatica sp. nov., Massilia mucilaginosa sp. nov., Massilia frigida sp. nov., and one Massilia genomospecies isolated from Antarctic streams, lakes and regoliths.

•Four novel Massilia species from extreme environment in Antarctica.•Characteristics of their adaptation to survive in extreme conditions.•Large number of genes enabling them to compete with other bacterial species.•Genes typical for rhizosphere-colonizing bacteria suggest ancient symbiosis.•Biotechnology potential of putative genes for aromatic compounds degradation.