Name: Heyndrickxia coagulans (Hammer 1915) Narsing Rao et al. 2023

Category: Species

Proposed as: comb. nov.

Basonym: Bacillus coagulans Hammer 1915 (Approved Lists 1980)

Etymology: co.a’gu.lans. L. v. coagulo, to curdle or coagulate; L. fem. part. adj. coagulans, curdling, coagulating

Gender: feminine

Type strain: 609; ATCC 7050; BCRC 10606; CCM 2013; CCRC 10606; CCUG 7417; CFBP 4225; CIP 66.25; DSM 1; HAMBI 1931; IAM 1115; IFO 12583; IMET 10993; JCM 2257; KACC 11248; LMG 6326; NBIMCC 8941; NBRC 12583; NCCB 48014; NCCB 77025; NCDO 1761; NCFB 1761; NCIB 9365; NCIMB 9365; NCTC 10334; NRIC 1005; NRRL NRS-609; NRS 609; VKM B-497

Conduct genome-based taxonomy at

16S rRNA gene: AB271752 Analyse FASTA

Valid publication: Narsing Rao MP, Banerjee A, Liu GH, Thamchaipenet A. Genome-based reclassification of Bacillus acidicola, Bacillus pervagus and the genera Heyndrickxia, Margalitia and Weizmannia. Int J Syst Evol Microbiol 2023; 73:5961.

IJSEM list: Oren A, Göker M. Notification list. Notification that new names and new combinations have appeared in volume 73, part 7 of the IJSEM. Int J Syst Evol Microbiol 2023; 73:6041.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym (taxonomically suspended)

Correct name: Bacillus coagulans Hammer 1915 (Approved Lists 1980)

• Synonyms:

  • Name	Kind
    Bacillus coagulans Hammer 1915 (Approved Lists 1980)	homotypic synonym, validly published under the ICNP
    Weizmannia coagulans (Hammer 1915) Gupta et al. 2020	homotypic synonym, validly published under the ICNP

• Notes:
  • 😩 Deposits incorrectly indicated in some sources as representing the type strain of this taxon: NCAIM B.01086; VKM B-731.
  • ❗ Heyndrickxia coagulans 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 Heyndrickxia.
  • 😷 The taxon name shown here has no risk group assigned, but is the homotypic synonym of Bacillus coagulans Hammer 1915 (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 29 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) until no later than 2028 in favour of Bacillus coagulans Hammer 1915 (Approved Lists 1980). Publication: Hammer BW. Bacteriological studies on the coagulation of evaporated milk. Iowa Agricultural Experimental Station Research Bulletin 1915; 19:119-131. Skerman VBD, McGowan V, Sneath PHA. Approved lists of bacterial names. Int J Syst Bacteriol 1980; 30:225-420.

Parent taxon: Heyndrickxia Gupta et al. 2020

Assigned by: Narsing Rao MP, Banerjee A, Liu GH, Thamchaipenet A. Genome-based reclassification of Bacillus acidicola, Bacillus pervagus and the genera Heyndrickxia, Margalitia and Weizmannia. Int J Syst Evol Microbiol 2023; 73:5961.

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Record number: 39735