Name: Chloroflexus aurantiacus Pierson and Castenholz 1974 (Approved Lists 1980)

Category: Species

Proposed as: sp. nov.

Etymology: au.ran.ti.a’cus. N.L. masc. adj. aurantiacus, orange-colored

Gender: masculine

Type strain: ATCC 29366; DSM 635; J-10-fl

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: D38365 Analyse FASTA

Effective publication: Pierson BK, Castenholz RW. A phototrophic gliding filamentous bacterium of hot springs, Chloroflexus aurantiacus, gen. and sp. nov. Arch Microbiol 1974; 100:5-24.

IJSEM list: Skerman VBD, McGowan V, Sneath PHA. Approved lists of bacterial names. Int J Syst Bacteriol 1980; 30:225-420.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 1

• Emendations:
  • Nouioui et al. 2018 Nouioui I, Carro L, Garcia-Lopez M, Meier-Kolthoff JP, Woyke T, Kyrpides NC, Pukall R, Klenk HP, Goodfellow M, Goker M. Genome-Based Taxonomic Classification of the Phylum Actinobacteria. Front Microbiol 2018; 9:2007. Oren A, Garrity GM. List of changes in taxonomic opinion no. 29. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2019; 69:13-32.

• Notes:
  • 🥇 Nomenclatural type of the genus Chloroflexus Pierson and Castenholz 1974 (Approved Lists 1980). Publication: Pierson BK, Castenholz RW. A phototrophic gliding filamentous bacterium of hot springs, Chloroflexus aurantiacus, gen. and sp. nov. Arch Microbiol 1974; 100:5-24.
  • 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 1, note = "Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No". — The risk group for Swiss Confederation has been imported on 2024-02-01. The full classification is: risk group = 1. — The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 1.
  • 🎓 Name mentioned 296 times in PubMed until 2024-03-27.

Parent taxon: Chloroflexus Pierson and Castenholz 1974 (Approved Lists 1980)

Assigned by: Pierson BK, Castenholz RW. A phototrophic gliding filamentous bacterium of hot springs, Chloroflexus aurantiacus, gen. and sp. nov. Arch Microbiol 1974; 100:5-24.

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Record number: 774668