Name: Niallia circulans (Jordan 1890) Gupta et al. 2020

Category: Species

Proposed as: comb. nov.

Basonym: Bacillus circulans Jordan 1890 (Approved Lists 1980)

Etymology: cir’cu.lans. L. fem. part. adj. circulans, making circles or round, circling

Gender: feminine

Type strain: ATCC 24; ATCC 4513; ATCC 9140; BCRC 10605; CCM 2048; CCRC 10605; CCUG 7416; CIP 52.75; DSM 11; HAMBI 1911; IAM 12462; IFO 13626; JCM 2504; LMG 13261; LMG 6926; NBIMCC 1042; NBRC 13626; NCCB 75011; NCDO 1775; NCFB 1775; NCIB 9374; NCIMB 9374; NCTC 2610; NRRL B-378; NRRL B-380; VKM B-1242

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB271747 Analyse FASTA

Valid publication: Gupta RS, Patel S, Saini N, Chen S. Robust demarcation of 17 distinct Bacillus species clades, proposed as novel Bacillaceae genera, by phylogenomics and comparative genomic analyses: description of Robertmurraya kyonggiensis sp. nov. and proposal for an emended genus Bacillus limiting it only to the members of the Subtilis and Cereus clades of species. Int J Syst Evol Microbiol 2020; 70:5753-5798.

IJSEM list: Oren A, Garrity GM. Notification list. Notification that new names and new combinations have appeared in volume 70, part 11 of the IJSEM. Int J Syst Evol Microbiol 2021; 71:4645.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym (taxonomically suspended)

Correct name: Bacillus circulans Jordan 1890 (Approved Lists 1980)

• Synonyms:

  • Name	Kind
    Bacillus circulans Jordan 1890 (Approved Lists 1980)	homotypic synonym, validly published under the ICNP

• Notes:
  • 🥇 Nomenclatural type of the genus Niallia Gupta et al. 2020. Publication: Gupta RS, Patel S, Saini N, Chen S. Robust demarcation of 17 distinct Bacillus species clades, proposed as novel Bacillaceae genera, by phylogenomics and comparative genomic analyses: description of Robertmurraya kyonggiensis sp. nov. and proposal for an emended genus Bacillus limiting it only to the members of the Subtilis and Cereus clades of species. Int J Syst Evol Microbiol 2020; 70:5753-5798.
  • ❗ Niallia circulans 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 Niallia.
  • 😷 The taxon name shown here has no risk group assigned, but is the homotypic synonym of Bacillus circulans Jordan 1890 (Approved Lists 1980), 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 11 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 risk group of the species itself. This name is taxonomically suspended (and therefore not recommended for medical use for now) in favour of Bacillus circulans Jordan 1890 (Approved Lists 1980). Publication: Jordan EO. A report on certain species of bacteria observed in sewage. In: Sedgewick WT (eds), A Report of the Biological Work of the Lawrence Experiment Station, Including an Account of Methods Employed and Results Obtained in the Microscopical and Bacteriological Investigation of Sewage and Water. Report on Water Supply and Sewerage (Part II). The Report of the Massachusetts Board of Health, Massachusetts Board of Public Health, Boston, 1890, p. 821-844. Skerman VBD, McGowan V, Sneath PHA. Approved lists of bacterial names. Int J Syst Bacteriol 1980; 30:225-420.

Parent taxon: Niallia Gupta et al. 2020

Assigned by: Gupta RS, Patel S, Saini N, Chen S. Robust demarcation of 17 distinct Bacillus species clades, proposed as novel Bacillaceae genera, by phylogenomics and comparative genomic analyses: description of Robertmurraya kyonggiensis sp. nov. and proposal for an emended genus Bacillus limiting it only to the members of the Subtilis and Cereus clades of species. Int J Syst Evol Microbiol 2020; 70:5753-5798.

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Record number: 14716