Species Clostridium rectum

Name: Clostridium rectum (Heller 1922) Holdeman and Moore 1972 (Approved Lists 1980)

Category: Species

Proposed as: comb. nov.

Basonym: "Hiblerillus rectus" Heller 1922

Etymology: rec’tum. L. neut. part. adj. rectum, straight

Pronunciation (Latin), gender: … REK-tum, neuter

Type strain: ATCC 25751; DSM 1295; JCM 1412

Conduct genome-based taxonomy at

16S rRNA gene: X77850 Analyse FASTA

Effective publication: Holdeman LV, Moore WEC. Anaerobe Laboratory Manual. Virginia Polytechnic Institute - Anaerobe Laboratory, Blacksburg/Virginia, 1972.

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: Fusobacterium mortiferum (Harris 1901) Moore and Holdeman 1970 (Approved Lists 1980)

Risk group: 2

Synonyms:

Name	Kind
"Hiblerillus rectus" Heller 1922	homotypic synonym, not validly published, basonym of name in Approved Lists
"Bacillus mortiferus" Harris 1901	heterotypic synonym, not validly published, basonym of name in Approved Lists
Fusobacterium mortiferum (Harris 1901) Moore and Holdeman 1970 (Approved Lists 1980)	heterotypic synonym, validly published under the ICNP

Notes:
- ⏲ According to De Witte et al. (2017), this species is a later heterotypic synonym of "Bacillus mortiferus" Harris 1901. Publication: De Witte C, Flahou B, Ducatelle R, Smet A, De Bruyne E, Cnockaert M, Taminiau B, Daube G, Vandamme P, Haesebrouck F. Detection, isolation and characterization of Fusobacterium gastrosuis sp. nov. colonizing the stomach of pigs. Syst Appl Microbiol 2017; 40:42-50. 🇧🇪
- ⏲ According to De Witte et al. (2017), this species is a later heterotypic synonym of Fusobacterium mortiferum (Harris 1901) Moore and Holdeman 1970 (Approved Lists 1980). Publication: De Witte C, Flahou B, Ducatelle R, Smet A, De Bruyne E, Cnockaert M, Taminiau B, Daube G, Vandamme P, Haesebrouck F. Detection, isolation and characterization of Fusobacterium gastrosuis sp. nov. colonizing the stomach of pigs. Syst Appl Microbiol 2017; 40:42-50. 🇧🇪
- ❗ Clostridium rectum 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 Clostridium.
- 😷 The risk group for Belgium has been imported on 2024-02-05. The full classification is: risk group = 2, note = "human pathogen". — 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 = 2. — 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 6 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.

Parent taxon: Clostridium Prazmowski 1880 (Approved Lists 1980)

Assigned by: Holdeman LV, Moore WEC. Anaerobe Laboratory Manual. Virginia Polytechnic Institute - Anaerobe Laboratory, Blacksburg/Virginia, 1972.

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Record number: 774968

This LPSN page was printed on 2026-02-14 16:54:27

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Species Clostridium rectum