Name: Alcaligenes phenolicus (Rehfuss and Urban 2006) Machado et al. 2023

Category: Species

Proposed as: comb. nov.

Basonym: Alcaligenes faecalis subsp. phenolicus Rehfuss and Urban 2006

Etymology: phe.no’li.cus. N.L. neut. n. phenol, common name for industrial solvent hydroxybenzene; N.L. masc. adj. phenolicus, pertaining to phenol

Pronunciation (Latin), gender: al-ka-LI-ge-nes p^he-NO-li-kus, masculine

Type strain: CCUG 54936; DSM 16503; J; NRRL B-41076

Conduct genome-based taxonomy at

16S rRNA gene: ON597429 Analyse FASTA

Effective publication: Machado RAR, Loulou A, Bhat AH, Mastore M, Terrettaz C, et al. Acinetobacter nematophilus sp. nov., Alcaligenes nematophilus sp. nov., Enterobacter nematophilus sp. nov., and Kaistia nematophila sp. nov., isolated from soil-borne nematodes and proposal for the elevation of Alcaligenes faecalis subsp. faecalis, Alcaligenes faecalis subsp. parafaecalis, and Alcaligenes faecalis subsp. phenolicus to the species level. Taxonomy 2023; 3:148-168. 🇨🇭

IJSEM list: Oren A, Göker M. Validation list no. 212. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2023; 73:5931.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym (and not recommended for medical use)

Correct name: Alcaligenes faecalis subsp. phenolicus Rehfuss and Urban 2006

Risk group: 1

• Synonyms:

  • Name	Kind
    Alcaligenes faecalis subsp. phenolicus Rehfuss and Urban 2006	homotypic synonym, validly published under the ICNP, distinct rank

• Notes:
  • ❗ Alcaligenes phenolicus 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 Alcaligenes.
  • 😷 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.
  • 🥱 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 risk group of the genus. This name is not taxonomically suspended any more (but still isn't preferred) in favour of Alcaligenes faecalis Castellani and Chalmers 1919 (Approved Lists 1980). Publication: Castellani A, Chalmers AJ. Manual of Tropical Medicine, 3rd ed. Williams Wood and Co., New York, 1919. Skerman VBD, McGowan V, Sneath PHA. Approved lists of bacterial names. Int J Syst Bacteriol 1980; 30:225-420.

Parent taxon: Alcaligenes Castellani and Chalmers 1919 (Approved Lists 1980)

Assigned by: Machado RAR, Loulou A, Bhat AH, Mastore M, Terrettaz C, et al. Acinetobacter nematophilus sp. nov., Alcaligenes nematophilus sp. nov., Enterobacter nematophilus sp. nov., and Kaistia nematophila sp. nov., isolated from soil-borne nematodes and proposal for the elevation of Alcaligenes faecalis subsp. faecalis, Alcaligenes faecalis subsp. parafaecalis, and Alcaligenes faecalis subsp. phenolicus to the species level. Taxonomy 2023; 3:148-168. 🇨🇭

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Record number: 37106