Name: Peptococcus heliotrinreducens corrig. Lanigan 1983

Category: Species

Proposed as: sp. nov.

Etymology: he.li.o.trin.re.du’cens. N.L. fem. n. heliotrina, heliotrine, a pyrrolizidine alkaloid; L. pres. part. reducens, leading back, bringing back and in chemistry converting to a different oxidation state; N.L. masc. part. adj. heliotrinreducens, referring to the organisms ability to bring about oxidative cleavage of the heliotrine molecule

Pronunciation (Latin), gender: pep-to-KOK-kus he-li-o-trin-re-DU-kens, masculine

Type strain: ATCC 29202; CCUG 47954; DSM 20476; JCM 14554; NCTC 11029; RHS 1

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AF101241 Analyse FASTA

Effective publication: Lanigan GW. Peptococcus heliotrinreducans, sp. nov., a cytochrome-producing anaerobe which metabolizes pyrrolizidine alkaloids. J Gen Microbiol 1976; 94:1-10.

IJSEM list: Anonymous. Validation list no. 10. Validation of publication of new names and new combinations previously effectively published outside the IJSB. Int J Syst Bacteriol 1983; 33:438-440.

Nomenclatural status: validly published under the ICNP, inappropriate correction

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

Risk group: 1

• Synonyms:

  • Name	Kind
    Slackia heliotrinireducens corrig. (Lanigan 1983) Wade et al. 1999	homotypic synonym, validly published under the ICNP
    Peptostreptococcus heliotrinireducens corrig. (Lanigan 1983) Ezaki and Yabuuchi 1986	homotypic synonym, validly published under the ICNP
    Peptococcus heliotrinireducens corrig. Lanigan 1983	homotypic synonym, validly published under the ICNP
    Peptococcus heliotrinreducans Lanigan 1983	other spelling of name, inaccurate spelling
    Peptostreptococcus heliotrinreducens (Lanigan 1983) Ezaki and Yabuuchi 1986	homotypic synonym, inaccurate spelling

• Notes:
  • 😷 The risk group for Swiss Confederation has been imported on 2024-02-01. The full classification is: risk group = 1, note = "PIIC". — The risk group for Germany has been imported on 2026-08-13. The full classification is: risk group = 1, note = "+". — 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 0 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.
  • 🧍 The specific epithet heliotrinreducens (sic) has been corrected in the new combination Slackia heliotrinireducens [see, Slackia heliotrinireducens corrig. (Lanigan 1983) Wade et al. 1999, comb. nov.]. However the name "Peptococcus heliotrinireducens" corrig. has never been formally proposed before December 14, 2000 [date of publication of the amended Rule 61; see Int. J. Syst. Evol. Microbiol., 2000, 50, page 2239, column (2)]. Consequently, in the "List of Prokaryotic names with Standing in Nomenclature", the epithet heliotrinreducens (sic) has been maintained for Peptococcus heliotrinreducens. Publication: Wade WG, Downes J, Dymock D, Hiom SJ, Weightman AJ, Dewhirst FE, Paster BJ, Tzellas N, Coleman B. The family Coriobacteriaceae: reclassification of Eubacterium exiguum (Poco et al. 1996) and Peptostreptococcus heliotrinreducens (Lanigan 1976) as Slackia exigua gen. nov., comb. nov. and Slackia heliotrinireducens gen. nov., comb. nov., and Eubacterium lentum (Prevot 1938) as Eggerthella lenta gen. nov., comb. nov. Int J Syst Bacteriol 1999; 49:595-600. 🇬🇧
  • 🧍 Inappropriate spelling correction of the epithet. The original spelling, Peptococcus heliotrinreducans (sic), has been corrected as Peptococcus helotrinreducens (sic) by the Associate Editor, IJSB [1]. These spellings have been corrected by Ezaki and Yabuuchi 1986 [2]. — 🧍 The name Peptococcus heliotrinreducens corrig. was inadvertently omitted from Validation List no. 10. This name is to be regarded as having been validly published in list no. 10 (April 1983). Publication: Anonymous. Validation list no. 11. Validation of publication of new names and new combinations previously effectively published outside the IJSB. Int J Syst Bacteriol 1983; 33:672-674.
  • 🧍 The name Peptococcus heliotrinreducens corrig. was inadvertently omitted from Validation List no. 10. Publication: Ezaki T, Yabuuchi E. Transfer of Peptococcus heliotrinreducens corrig. to the genus Peptostreptococcus: Peptostreptococcus heliotrinreducens Lanigan 1983 comb. nov. Int. J. Syst. Bacteriol. 1986; 36:107-108. 🇯🇵

Parent taxon: Peptococcus Kluyver and van Niel 1936 (Approved Lists 1980)

Assigned by: Lanigan GW. Peptococcus heliotrinreducans, sp. nov., a cytochrome-producing anaerobe which metabolizes pyrrolizidine alkaloids. J Gen Microbiol 1976; 94:1-10.

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Record number: 779366