Abstract

Hanstruepera crassostreae L53T was compared with Pseudobizionia ponticola MM-14T to examine the taxonomic relationship between the two type strains. The 16S rRNA gene sequence of H. crassostreae L53T had complete similarity (100.0%) to that of P. ponticola MM-14T. The results of phylogenetic analyses based on 16S rRNA gene sequences indicated that the two strains formed a tight cluster within the genus Pseudobizionia. Draft genomic comparison between the two strains revealed an average nucleotide identity of 96.9 % and a digital DNA-DNA hybridization estimate of 75.3±2.8 %, strongly indicating that the two strains represented a single species. In addition, neither strain displayed any striking difference in metabolic, physiological or chemotaxonomic features. Therefore, we propose that Hanstruepera crassostreae is a later heterotypic synonym of Pseudobizionia ponticola.

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