KZ-21 was compared with THG-SMD2.3 to examine the taxonomic relationship between the two type strains. The 16S rRNA gene sequence of KZ-21 shared complete similarity (100.0 %) with that of THG-SMD2.3. The results of phylogenetic analyses based on 16S rRNA gene sequences indicated that the two strains formed a tight cluster within the genus . Genome comparison between the two strains revealed an average nucleotide identity of 99.2 % and a digital DNA-DNA hybridization estimate of 93.7±1.8 %, strongly indicating that the two strains belong to a single species. In addition, neither strain displayed any striking differences in metabolic, physiological or chemotaxonomic features. Therefore, we propose as a later heterotypic synonym of .
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