A number of strains isolated from desert soil samples were shown to belong to a previously unidentified species, for which we propose the name . The type strain is RO-H-1 (= NRRL B-14698). On the basis of restriction digest data, is most closely related to , and . So far, can be distinguished from only by differences in whole-cell fatty acid composition, divergence in DNA sequence, and resistance to genetic transformation between taxa (in addition to reduced genome relatedness values). Sequence divergence and sexual isolation may prove to be more useful than metabolic characteristics for delimiting cryptic species.


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