Psychromonas aquatilis sp. nov., isolated from seawater samples obtained in the Chilean Antarctica

Int J Syst Evol Microbiol. 2017 May;67(5):1306-1311. doi: 10.1099/ijsem.0.001801. Epub 2017 May 30.


A slightly beige-white pigmented, Gram-staining-negative, rod-shaped bacterium, strain M1A1T, was isolated from seawater samples obtained in Fildes Bay, Antarctica (62°12' S 58° 57' W). Phylogenetic analysis based on nearly full-length 16S rRNA gene sequences showed that the isolate shared 98.4 % 16S rRNA gene sequence identity to the type strain of Psychromonas arctica, but less than 97 % 16S rRNA gene sequence similarities to all other species of the genus Psychromonas. DNA-DNA hybridization with Psychromonas arctica DSM 14288T showed low values (21 %, reciprocal 27 %). The main cellular fatty acid of strain M1A1T was summed feature 3 fatty acids (C16 : 1ω7c/C16 : 1ω8c), followed by C16 : 0. Based on phylogenetic, chemotaxonomic, genomic and phenotypic analyses, we propose a novel species of the genus Psychromonas with the name Psychromonas aquatilis sp. nov. and the strain M1A1T (=CIP 111183T=CCM 8710T=LMG 29766T) as type strain.

MeSH terms

  • Antarctic Regions
  • Bacterial Typing Techniques
  • Base Composition
  • Chile
  • DNA, Bacterial / genetics
  • Fatty Acids / chemistry
  • Gammaproteobacteria / classification*
  • Gammaproteobacteria / genetics
  • Gammaproteobacteria / isolation & purification
  • Nucleic Acid Hybridization
  • Phylogeny*
  • RNA, Ribosomal, 16S / genetics
  • Seawater / microbiology*
  • Sequence Analysis, DNA


  • DNA, Bacterial
  • Fatty Acids
  • RNA, Ribosomal, 16S