natronospira natronospira natronospira is an extremely halotolerant and alkaliphilic genus of bacteria from the family of ectothiorhodospiraceae with one known species (natronospira proteinivora). natronospira proteinivora has been isolated from hypersaline soda lakes from the kulunda steppe in russia. natronospira scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: chromatiales family: ectothiorhodospiraceae genus: natronospirasorokin et al. 2017 type species natronospira proteinivora species n. proteinivora