Pseudidiomarina maritima Wu et al. 2009 is a later heterotypic synonym of Pseudidiomarina tainanensis Jean et al. 2009 and emended description of the species

Int J Syst Evol Microbiol. 2019 Dec;69(12):3765-3768. doi: 10.1099/ijsem.0.003678.


A comparative analysis of the two type strains of Pseudidiomarina maritima 908087T and Pseudidiomarina tainanensis PIN1T was performed to examine their taxonomic relationship. The 16S rRNA gene sequence of P. maritima 908087T shared a high similarity (99.8 %) with that of P. tainanensis PIN1T. The phylogenetic trees based on 16S rRNA gene sequences indicated that the two strains formed a tight cluster within the genus Pseudidiomarina. Whole genomic comparison between the two strains revealed a digital DNA-DNA hybridization estimate of 75.8 % and an average nucleotide identity value of 97.3 %, strongly indicating that they represented a single species. In addition, the strains did not display any striking differences in their metabolic, physiological or chemotaxonomic features. Therefore, we propose that Pseudidiomarina maritima is a later heterotypic synonym of Pseudidiomarina tainanensis.

Keywords: Pseudidiomarina maritima; Pseudidiomarina tainanensis; polyphasic analysis; reclassification.

MeSH terms

  • Alteromonadaceae / classification*
  • Alteromonadaceae / isolation & purification
  • Bacterial Typing Techniques
  • DNA, Bacterial / genetics
  • Nucleic Acid Hybridization
  • Phylogeny*
  • RNA, Ribosomal, 16S / genetics
  • Sequence Analysis, DNA


  • DNA, Bacterial
  • RNA, Ribosomal, 16S