Name: Meiothermus timidus Pires et al. 2005

Category: Species

Proposed as: sp. nov.

Etymology: ti.mi.dus. L. masc. adj. timidus, timid, because only one strain was recovered from the hot spring at São Pedro do Sul after the isolation of so many organisms, over several years, from this site

Gender: masculine

Type strain: CIP 108604; DSM 17022; LMG 22897; NBRC 103207; SPS-243

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AJ871168 Analyse FASTA

Effective publication: Pires AL, Albuquerque L, Tiago I, Nobre MF, Empadinhas N, Verissimo A, da Costa MS. Meiothermus timidus sp. nov., a new slightly thermophilic yellow-pigmented species. FEMS Microbiol Lett 2005; 245:39-45.

IJSEM list: Euzeby JP. Validation list no. 104. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2005; 55:1395-1397.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym

Correct name: Calidithermus timidus (Pires et al. 2005) Raposo et al. 2019

Risk group: 1

• Synonyms:

  • Name	Kind
    Calidithermus timidus (Pires et al. 2005) Raposo et al. 2019	homotypic synonym, validly published under the ICNP

• Notes:
  • ❗ Meiothermus timidus is the correct name instead if this species is regarded as a separate species (i.e., if its nomenclatural type is not assigned to another species whose name is validly published, legitimate and not rejected and has priority) within a separate genus Meiothermus.
  • 😷 The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 1.
  • 🎓 Name mentioned 4 times in PubMed until 2024-03-28.
  • 🧍 The genome of the type strain was sequenced as part of the GEBA (Genomic Encyclopedia of Bacteria and Archaea) project. Publication: 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.

Parent taxon: Meiothermus Nobre et al. 1996

Assigned by: Pires AL, Albuquerque L, Tiago I, Nobre MF, Empadinhas N, Verissimo A, da Costa MS. Meiothermus timidus sp. nov., a new slightly thermophilic yellow-pigmented species. FEMS Microbiol Lett 2005; 245:39-45.

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Record number: 777755