A neighbor-joining phylogenetic tree inferred from 16S rRNA gene sequences. Sequences of the 10 strains isolated in this study and those of the type strains of type species of all haloarchaeal genera validly published are comprised, as well as those of all species of the genus Halococcus, and sequences relevant to Halogeometricum borinquense and Haladaptatus paucihalophilus. The sequence M60880 of Methanospirillum hungatei was used as an outgroup. Bootstrap values greater than 70% in 1000 resamplings are displayed. Bar, 0.02 expected nucleotide substitutions per site.