Species Sulfolobus tokodaii

Name: Sulfolobus tokodaii Suzuki et al. 2002

Category, proposed as: species, sp. nov.

Etymology: to.ko.da’i.i. N.L. gen. masc. n. tokodaii, of Tokoda (the Japanese name of the Tokyo Institute of Technology, where this isolate was initially characterized)

Pronunciation (Latin), gender: sul-FO-lo-bus to-ko-DA-i-i, masculine

Type strain: 7; DSM 16993; JCM 10545; NBRC 100140

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB022438 Analyse FASTA

Effective publication: Suzuki T, Iwasaki T, Uzawa T, Hara K, Nemoto N, Kon T, Ueki T, Yamagishi A, Oshima T. Sulfolobus tokodaii sp. nov. (f. Sulfolobus sp. strain 7), a new member of the genus Sulfolobus isolated from Beppu Hot Springs, Japan. Extremophiles 2002; 6:39-44. 🇯🇵

IJSEM list: Anonymous. Validation list no. 87. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2002; 52:1437-1438.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym

Correct name: Sulfurisphaera tokodaii (Suzuki et al. 2002) Tsuboi et al. 2018

Risk group: 1

• Synonyms:

  • Name	Kind
    Sulfurisphaera tokodaii (Suzuki et al. 2002) Tsuboi et al. 2018	homotypic synonym, validly published under the ICNP

• Notes:
  • 😩 Deposits incorrectly indicated in some sources as representing the type strain of this taxon: InaCC Ar81; JCM 32117.
  • ❗ Sulfolobus tokodaii 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 Sulfolobus.
  • 😷 The risk group for Germany has been imported on 2026-08-13. 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 214 times in PubMed until 2026-06-11.
  • 🧍 According to Rules 27(3) and 30, this name is not validly published, because the original publication makes reference to the deposit of the type strain in a single recognized culture collection. However, according to the Judicial Opinion 81, Sulfolobus tokodaii Suzuki et al. 2002 is considered to be validly published, since deposit in a second culture collection in a different country has been documented. 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. 🇫🇷

Parent taxon: Sulfolobus Brock et al. 1972 (Approved Lists 1980)

Assigned by: Suzuki T, Iwasaki T, Uzawa T, Hara K, Nemoto N, Kon T, Ueki T, Yamagishi A, Oshima T. Sulfolobus tokodaii sp. nov. (f. Sulfolobus sp. strain 7), a new member of the genus Sulfolobus isolated from Beppu Hot Springs, Japan. Extremophiles 2002; 6:39-44. 🇯🇵

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Record number: 782317