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<p>In this study, we aimed to clarify the taxonomic positions of <i>Micromonospora veneta</i> DSM 109713<sup>T</sup> and <i>Micromonospora coerulea</i> JCM 3175<sup>T</sup> using whole-genome phylogenetic analysis, pangenomic analysis and chemotaxonomic characteristics. The 16S rRNA gene sequences of <i>veneta</i> DSM 109713<sup>T</sup> and <i>M. coerulea</i> JCM 3175<sup>T</sup> were highly similar (99.2%), and in the phylogenetic trees constructed using whole genome sequences and 16S rRNA gene sequences, <i>M. veneta</i> DSM 109713<sup>T</sup> and <i>M. coerulea</i> JCM 3175<sup>T</sup> clustered together and formed a clade. The values of average amino acid (AAI), ANI-BLAST (ANIb) and ANI-MUMmer (ANIm), and digital DNA-DNA hybridization (dDDH) between <i>M. veneta</i> DSM 109713<sup>T</sup> and <i>M. coerulea</i> JCM 3175<sup>T</sup> were 97.57%, 97.81%, 98.40%, 85.0%, respectively, which are all greater than the thresholds used for species delimitation (AAI: 95.5%, ANI: 95–96%, and dDDH: 70%). Most phenotypic and chemotaxonomic features between the two species were similar, with only a few differences. Based on the combined evidence from genomic and phenotypic comparison, we propose <i>Micromonospora veneta</i> as a later heterotypic synonym of <i>Micromonospora coerulea</i>.</p>

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Genome-based reclassification of Micromonospora veneta Kaewkla et al. 2022 as a later heterotypic synonym of Micromonospora coerulea Jensen 1932 (Approved lists 1980)

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  • 发表日期：

    2025年7月28日

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  • Xinni Zhang,
  • Xiaoman Chen,
  • Xinlei Wu,
  • Yang Liu,
  • Yuli Wei

摘要

In this study, we aimed to clarify the taxonomic positions of Micromonospora veneta DSM 109713T and Micromonospora coerulea JCM 3175T using whole-genome phylogenetic analysis, pangenomic analysis and chemotaxonomic characteristics. The 16S rRNA gene sequences of veneta DSM 109713T and M. coerulea JCM 3175T were highly similar (99.2%), and in the phylogenetic trees constructed using whole genome sequences and 16S rRNA gene sequences, M. veneta DSM 109713T and M. coerulea JCM 3175T clustered together and formed a clade. The values of average amino acid (AAI), ANI-BLAST (ANIb) and ANI-MUMmer (ANIm), and digital DNA-DNA hybridization (dDDH) between M. veneta DSM 109713T and M. coerulea JCM 3175T were 97.57%, 97.81%, 98.40%, 85.0%, respectively, which are all greater than the thresholds used for species delimitation (AAI: 95.5%, ANI: 95–96%, and dDDH: 70%). Most phenotypic and chemotaxonomic features between the two species were similar, with only a few differences. Based on the combined evidence from genomic and phenotypic comparison, we propose Micromonospora veneta as a later heterotypic synonym of Micromonospora coerulea.