Name: Thioalkalimicrobium cyclicum corrig. Sorokin et al. 2002

Category: Species

Proposed as: sp. nov.

Etymology: cy’cli.cum. L. masc. n. cyclus, a circle; L. neut. adj. suff. -icum, suffix used with the sense of pertaining to; L. neut. adj. cyclicum, circle-like

Gender: neuter

Type strain: ALM 1; DSM 14477; JCM 11371

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AF329082 Analyse FASTA

Valid publication: Sorokin DY, Gorlenko VM, Tourova TP, Tsapin AI, Nealson KH, Kuenen GJ. Thioalkalimicrobium cyclicum sp. nov. and Thioalkalivibrio jannaschii sp. nov., novel species of haloalkaliphilic, obligately chemolithoautotrophic sulfur-oxidizing bacteria from hypersaline alkaline Mono Lake (California). Int J Syst Evol Microbiol 2002; 52:913-920.

IJSEM list: Anonymous. Notification list. Notification that new names and new combinations have appeared in volume 52, part 3 of the IJSEM. Int J Syst Evol Microbiol 2002; 52:1077-1079.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym

Correct name: Thiomicrospira cyclica (Sorokin et al. 2002) Boden et al. 2017

Risk group: 1

• Synonyms:

  • Name	Kind
    Thiomicrospira cyclica (Sorokin et al. 2002) Boden et al. 2017	homotypic synonym, validly published under the ICNP
    Thialkalimicrobium cyclicum Sorokin et al. 2002	other spelling of name, inaccurate spelling

• Emendations:
  • Kappler et al. 2016 Kappler U, Davenport K, Beatson S, Lapidus A, Pan C, Han C, Montero-Calasanz Mdel C, Land M, Hauser L, Rohde M, et al. Complete genome sequence of the haloalkaliphilic, obligately chemolithoautotrophic thiosulfate and sulfide-oxidizing gamma-proteobacterium Thioalkalimicrobium cyclicum type strain ALM 1 (DSM 14477^T). Stand Genomic Sci 2016; 11:38.
    Notes:
    • 🧍 As of 2020-09-20 this emendation was not yet included in an IJSEM List of Changes in Taxonomic Opinion.

• Notes:
  • ❗ Thioalkalimicrobium cyclicum 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 Thioalkalimicrobium.
  • 😷 The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 1.
  • 🎓 Name mentioned 2 times in PubMed until 2024-03-27.
  • 🧍 The original spelling of the genus name, Thioalkalimicrobium (sic), was corrected by the List Editor of the IJSEM to Thialkalimicrobium (IJSEM 51:796). This correction was withdrawn following a decision of the Judicial Commission of the International Committee on Systematics of Prokaryotes at the Xth International (IUMS) Congress of Bacteriology and Applied Microbiology 2002, Paris (See IJSEM 55:527, Session 2, Minute 13). Publication: Anonymous. Notification list. Notification that new names and new combinations have appeared in volume 51, part 2 of the IJSEM. Int J Syst Evol Microbiol 2001; 51:795-796.
  • 🧍 The original spelling, Thioalkalimicrobium cyclicum, was corrected to Thialkalimicrobium cyclicum by the List Editor of the IJSEM [1]. However, during the meeting of the Judicial Commission held during the Xth International (IUMS) Congress of Bacteriology and Applied Microbiology [2], H.G. Trüper proposed that the recommendations governing the use of the connecting vowel should be overruled by the usage in chemistry and physics. Consequently, in combined names, which include terms used in chemistry or physics the connecting vowel shall not be dropped when the following component starts with a vowel and when this may cause ambiguity or uncertainty in meaning [2]. The Judicial Commission unanimously agreed to this proposal [2] and the original spelling, Thioalkalimicrobium cyclicum, must be used. Publication: Anonymous. Notification list. Notification that new names and new combinations have appeared in volume 52, part 3 of the IJSEM. Int J Syst Evol Microbiol 2002; 52:1077-1079.
  • 🧍 The specific epithet cyclicum is a Latin adjective not a Neo-Latin noun as cited by Sorokin et al. 2002. Publication: De Vos P, Trüper HG, Tindall BJ. Judicial Commission of the International Committee on Systematics of Prokaryotes Xth International (IUMS) Congress of Bacteriology and Applied Microbiology. Minutes of the meetings, 28, 29 and 31 July and 1 August 2002, Paris, France. Int. J. Syst. Evol. Microbiol. 2005; 55:525-532.

Parent taxon: Thioalkalimicrobium corrig. Sorokin et al. 2001

Assigned by: Sorokin DY, Gorlenko VM, Tourova TP, Tsapin AI, Nealson KH, Kuenen GJ. Thioalkalimicrobium cyclicum sp. nov. and Thioalkalivibrio jannaschii sp. nov., novel species of haloalkaliphilic, obligately chemolithoautotrophic sulfur-oxidizing bacteria from hypersaline alkaline Mono Lake (California). Int J Syst Evol Microbiol 2002; 52:913-920.

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Record number: 782688