Name: Alcaligenes parafaecalis (Schroll et al. 2001) Machado et al. 2023

Category: Species

Proposed as: comb. nov.

Basonym: Alcaligenes faecalis subsp. parafaecalis Schroll et al. 2001

Etymology: para.fae.ca’lis. Gr. prep. para, beside, alongside of, near, like; N.L. masc./fem. adj. faecalis, specific epithet; N.L. masc./fem. adj. parafaecalis, intended to mean alongside of the species Alcaligenes faecalis

Gender: masculine

Type strain: CCUG 48316; CIP 106866; DSM 13975; DSM 3975; G

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AJ242986 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

Correct name: Alcaligenes faecalis subsp. parafaecalis Schroll et al. 2001

• Synonyms:

  • Name	Kind
    Alcaligenes faecalis subsp. parafaecalis Schroll et al. 2001	homotypic synonym, validly published under the ICNP, distinct rank

• Notes:
  • ❗ Alcaligenes parafaecalis 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 taxon name shown here has no risk group assigned, but is the homotypic synonym of Alcaligenes faecalis subsp. parafaecalis Schroll et al. 2001, which has a risk group (Swiss Confederation) above 1. This may require that the name shown here is not treated as the correct name for practical purposes.
  • 🎓 Name mentioned 0 times in PubMed until 2024-03-27.

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: 37116