Mucilaginibacter celer sp. Nov. and aquirhabdus parva gen. nov., sp. nov., isolated from freshwater

Minji Kim, Su Kyoung Shin, Hana Yi

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2 Citations (Scopus)


Two novel bacteria, designated HYN0043T and HYN0046T, were isolated from a freshwater lake in Korea. 16S rRNA gene sequence phylogeny indicated that strain HYN0043T belongs to the genus Mucilaginibacter of the family Sphingobacteriaceae because it showed highest sequence similarity to Mucilaginibacter oryzae (98.2%). The average nucleotide identity between strain HYN0043T and M. oryzae was 83.5%, which is clearly below the suggested threshold for species demarcation. Strain HYN0046T was found to belong to the family Moraxellaceae and shared highest sequence similarity with Agitococcus lubricus (93.8%). The average amino acid identity values between strain HYN0046T and representative type strains of closely related genera (Alkanindiges, Agitococcus and Acinetobacter) were 53.1–60.7%, implying the novelty of the isolate at the genus level. Phenotypic characteristics (physiological, biochemical and chemotaxonomic) also supported the taxonomic novelty of the two isolates. Thus, we suggest the following names to accommodate strains HYN0043T and HYN0046T: Mucilaginibacter celer sp. nov. (type strain HYN0043T=KACC 19184T=NBRC 112738T) in the family Spingobacteriaceae and phylum Bacteroidetes and Aquirhabdus parva gen. nov., sp. nov. (type strain HYN0046T=KACC 19178T=NBRC 112739T) in the family Moraxellaceae and phylum Proteobacteria.

Original languageEnglish
Article number004437
Pages (from-to)5479-5487
Number of pages9
JournalInternational Journal of Systematic and Evolutionary Microbiology
Issue number10
Publication statusPublished - 2020

Bibliographical note

Funding Information:
This study was supported by the research grant ‘Survey of Fresh-water Organisms and Specimen Collection (Prokaryotes)’ from the Nakdonggang National Institute of Biological Resources of the Ministry of Environment in Korea and by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2019R1F1A1059925).

Publisher Copyright:
© 2020 The Authors.


  • Aquirhabdus parva
  • Freshwater
  • Jinyangho Lake
  • Mucilaginibacter celer

ASJC Scopus subject areas

  • Microbiology
  • Ecology, Evolution, Behavior and Systematics


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