Name: Meiothermus rufus Albuquerque et al. 2010

Category: Species

Proposed as: sp. nov.

Etymology: ru’fus. L. masc. adj. rufus, red, reddish

Pronunciation (Latin), gender: me-io-T^HER-mus RU-fus, masculine

Type strain: CAL-4; DSM 22234; LMG 24878

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: FN178496 Analyse FASTA

Effective publication: Albuquerque L, Ferreira C, Tomaz D, Tiago I, Verissimo A, da Costa MS, Nobre MF. Meiothermus rufus sp. nov., a new slightly thermophilic red-pigmented species and emended description of the genus Meiothermus. Syst Appl Microbiol 2009; 32:306-313. 🇵🇹

IJSEM list: Euzeby JP. Validation list no. 131. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2010; 60:1-2.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 1

• Emendations:
  • García-López et al. 2019 Garcia-Lopez M, Meier-Kolthoff JP, Tindall BJ, Gronow S, Woyke T, Kyrpides NC, Hahnke RL, Goker M. Analysis of 1,000 Type-Strain Genomes Improves Taxonomic Classification of Bacteroidetes. Front Microbiol 2019; 10:2083. 🇩🇪 Oren A, Garrity GM. List of changes in taxonomic opinion no. 32. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2020; 70:4061-4090.
    Notes:
    • 🧍 The genome of the type strain was sequenced as part of the GEBA (Genomic Encyclopedia of Bacteria and Archaea) project.

• Notes:
  • 😷 The risk group for Germany has been imported on 2026-08-13. The full classification is: risk group = 1. — If in doubt, use the risk group given in the regulations for your country and, if these are not available, use the risk group given in the catalogue of the culture collection from which you have obtained or intend to obtain the strain.
  • 🎓 Name mentioned 2 times in PubMed until 2026-06-11.

Parent taxon: Meiothermus Nobre et al. 1996

Assigned by: Albuquerque L, Ferreira C, Tomaz D, Tiago I, Verissimo A, da Costa MS, Nobre MF. Meiothermus rufus sp. nov., a new slightly thermophilic red-pigmented species and emended description of the genus Meiothermus. Syst Appl Microbiol 2009; 32:306-313. 🇵🇹

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Record number: 788225