Name: Novosphingobium stygium corrig. (Balkwill et al. 1997) Takeuchi et al. 2001

Category: Species

Proposed as: comb. nov.

Basonym: Sphingomonas stygia Balkwill et al. 1997

Etymology: sty’gi.um. L. neut. adj. stygium, pertaining to the underworld, subterranean

Gender: neuter

Type strain: ATCC 700280; B 712; CIP 105154; DSM 12445; IFO 16085; NBRC 16085; SMCC B0712

See detailed strain information at

16S rRNA gene: AB025013 Analyse FASTA

Valid publication: Takeuchi M, Hamana K, Hiraishi A. Proposal of the genus Sphingomonas sensu stricto and three new genera, Sphingobium, Novosphingobium and Sphingopyxis, on the basis of phylogenetic and chemotaxonomic analyses. Int J Syst Evol Microbiol 2001; 51:1405-1417. 🇯🇵

IJSEM list: Anonymous. Notification list. Notification that new names and new combinations have appeared in volume 51, part 4 of the IJSEM. Int J Syst Evol Microbiol 2001; 51:1621-1623.

Nomenclatural status: validly published under the ICNP

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

Correct name: Novosphingobium aromaticivorans corrig. (Balkwill et al. 1997) Takeuchi et al. 2001

Risk group: 1

• Synonyms:

  • Name	Kind
    Novosphingobium aromaticivorans corrig. (Balkwill et al. 1997) Takeuchi et al. 2001	heterotypic synonym, validly published under the ICNP
    Sphingomonas aromaticivorans Balkwill et al. 1997	heterotypic synonym, validly published under the ICNP
    Novosphingobium aromaticivorum (Balkwill et al. 1997) Takeuchi et al. 2001	heterotypic synonym, inaccurate spelling
    Sphingomonas stygia Balkwill et al. 1997	homotypic synonym, validly published under the ICNP
    Novosphingobium stygiae (Balkwill et al. 1997) Takeuchi et al. 2001	other spelling of name, inaccurate spelling

• Notes:
  • ⏲ According to Chaudhary et al. (2021), this species is a later heterotypic synonym of Novosphingobium aromaticivorans corrig. (Balkwill et al. 1997) Takeuchi et al. 2001. Publication: Chaudhary DK, Dahal RH, Kim DU, Kim J. Novosphingobium olei sp. nov., with the ability to degrade diesel oil, isolated from oil-contaminated soil and proposal to reclassify Novosphingobium stygium as a later heterotypic synonym of Novosphingobium aromaticivorans. Int J Syst Evol Microbiol 2021; 71:4628. 🇰🇷
  • ⏲ According to Chaudhary et al. (2021), this species is a later heterotypic synonym of Sphingomonas aromaticivorans Balkwill et al. 1997. Publication: Chaudhary DK, Dahal RH, Kim DU, Kim J. Novosphingobium olei sp. nov., with the ability to degrade diesel oil, isolated from oil-contaminated soil and proposal to reclassify Novosphingobium stygium as a later heterotypic synonym of Novosphingobium aromaticivorans. Int J Syst Evol Microbiol 2021; 71:4628. 🇰🇷
  • ⏲ According to Chaudhary et al. (2021), this species is a later heterotypic synonym of Novosphingobium aromaticivorum (Balkwill et al. 1997) Takeuchi et al. 2001. Publication: Chaudhary DK, Dahal RH, Kim DU, Kim J. Novosphingobium olei sp. nov., with the ability to degrade diesel oil, isolated from oil-contaminated soil and proposal to reclassify Novosphingobium stygium as a later heterotypic synonym of Novosphingobium aromaticivorans. Int J Syst Evol Microbiol 2021; 71:4628. 🇰🇷
  • 🏢 Synonymy of this taxon was mentioned in an IJSEM list. Publication: Oren A, Garrity GM. Notification list. Notification that new names and new combinations have appeared in volume 71, part 2 of the IJSEM. Int J Syst Evol Microbiol 2021; 71:4766.
  • ❗ Novosphingobium stygium 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 Novosphingobium.
  • 😷 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 Germany has been imported on 2023-10-29. The full classification is: risk group = 1. — 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 genus.
  • 🧍 According to Rules 27(3) and 30, this name is not validly published because the effective publication makes no reference to the deposit of the type strain in any publicly accessible service collection, but deposits in at least two recognized culture collections in different countries are documented. According to the Judicial Opinion 81, Novosphingobium stygium corrig. (Balkwill et al. 1997) Takeuchi et al. 2001 is to be considered to be validly published. Publication: Euzeby JP, Tindall BJ. Status of strains that contravene Rules 27(3) and 30 of the Bacteriological Code. Request for an opinion. Int J Syst Evol Microbiol 2004; 54:293-301. 🇫🇷
  • 🧍 The original spelling of the specific epithet stygiae (sic), has been corrected by the List Editor, IJSEM. Publication: Anonymous. Notification list. Notification that new names and new combinations have appeared in volume 51, part 4 of the IJSEM. Int J Syst Evol Microbiol 2001; 51:1621-1623.

Parent taxon: Novosphingobium Takeuchi et al. 2001

Assigned by: Takeuchi M, Hamana K, Hiraishi A. Proposal of the genus Sphingomonas sensu stricto and three new genera, Sphingobium, Novosphingobium and Sphingopyxis, on the basis of phylogenetic and chemotaxonomic analyses. Int J Syst Evol Microbiol 2001; 51:1405-1417. 🇯🇵

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Record number: 778918