Name: Thiobacillus novellus Starkey 1934 (Approved Lists 1980)

Category: Species

Proposed as: sp. nov.

Etymology: no.vel’lus. L. masc. adj. novellus, new

Pronunciation, gender: … no-WEL-lus, masculine

Type strain: ATCC 8093; CCM 1077; CIP 104402; CIP 106821; DSM 506; IAM 12100; IFO 12443; IFO 14993; JCM 20403; NBRC 12443; NBRC 14993; NCCB 38019; NCCB 81075; NCIB 10456; NCIB 9113; NCIMB 10456; NCIMB 9113

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: D32247 Analyse FASTA

Effective publication: Starkey RL. Cultivation of Organisms Concerned in the Oxidation of Thiosulfate. J Bacteriol 1934; 28:365-386.

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: synonym (and not recommended for medical use)

Correct name: Ancylobacter novellus (Starkey 1934) Doronina et al. 2023

Risk group: 1

• Synonyms:

  • Name	Kind
    Starkeya novella (Starkey 1934) Kelly et al. 2000	homotypic synonym, validly published under the ICNP
    Ancylobacter novellus (Starkey 1934) Doronina et al. 2023	homotypic synonym, validly published under the ICNP

• Notes:
  • ❗ Thiobacillus novellus 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 Thiobacillus.
  • 😷 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. — 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 55 times in PubMed until 2025-06-04.
  • 🙅 This name is on the List of Recommended Names for bacteria of medical importance (LoRN) as a synonym of the name to be applied to this species. The name is on LoRN because of the recorded pathogenicity of other species in the genus.

Parent taxon: Thiobacillus Beijerinck 1904 (Approved Lists 1980)

Assigned by: Starkey RL. Cultivation of Organisms Concerned in the Oxidation of Thiosulfate. J Bacteriol 1934; 28:365-386.

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Record number: 782715