Name: Cellvibrio japonicus Humphry et al. 2003

Category: Species

Proposed as: sp. nov.

Etymology: ja.po’ni.cus. N.L. masc. adj. japonicus, pertaining to Japan, where the type strain was originally isolated

Pronunciation (Latin), gender: kell-WI-bri-o ja-PO-ni-kus, masculine

Type strain: DSM 16015; NCDO 2697; NCIMB 10462; Ueda107

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AF452103 Analyse FASTA

Valid publication: Humphry DR, Black GW, Cummings SP. Reclassification of 'Pseudomonas fluorescens subsp. cellulosa' NCIMB 10462 (Ueda et al. 1952) as Cellvibrio japonicus sp. nov. and revival of Cellvibrio vulgaris sp. nov., nom. rev. and Cellvibrio fulvus sp. nov., nom. rev. Int J Syst Evol Microbiol 2003; 53:393-400. 🇬🇧

IJSEM list: Euzeby JP. Notification list. Notification that new names and new combinations have appeared in volume 53, part 2 of the IJSEM. Int J Syst Evol Microbiol 2003; 53:939-940.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 1

• Notes:
  • 😢 The terminology used by the authors is in line with many other taxonomic studies and does not negatively affect their main results; some improvements may nevertheless be possible. The phrase "validly described" is misleading. Whether taxa can have "members" is debatable. See the LPSN phylogeny page for details. Publication: Göker M. What can genome analysis offer for bacteria? In: Bridge P, Smith D, Stackebrandt E (eds), Trends in the systematics of bacteria and fungi, CAB International, Wallingford, 2021, p. 255-281. 🇬🇧
  • 😷 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 85 times in PubMed until 2026-06-11.
  • 🧍 According to Rules 27(3) and 30, Cellvibrio japonicus Humphry et al. 2003 is not validly published because, at the time of publication, the type strain was not deposited in two publicly accessible service collections in different countries [1]. In a Request for an Opinion, Euzéby and Tindall provide a solution whereby this name may be considered to be validly published [2]. Publication: Oren A, Arahal DR, Christensen H, Goker M, Manaia CM, Moore ERB. International Code of Nomenclature of Prokaryotes. Prokaryotic Code (2025 Revision). Int J Syst Evol Microbiol 2026; 76:6979. 🇮🇱
  • 🧍 Cellvibrio japonicus Humphry et al. 2003 was previously known as "Pseudomonas fluorescens subsp. cellulosa" (Ueda et al. 1952) NCIMB 10462 or as "Pseudomonas cellulosa" Dees et al. 1995. — According to Rules 27(3) and 30, Cellvibrio japonicus Humphry et al. 2003 is not validly published because, at the time of publication, the type strain was not deposited in two publicly accessible service collections in different countries [1]. Publication: De Vos P, Trüper HG. Judicial Commission of the International Committee on Systematic Bacteriology. IXth International (IUMS) Congress of Bacteriology and Applied Microbiology. Minutes of the meetings, 14, 15 and 18 August 1999, Sydney, Australia. Int. J. Syst. Evol. Microbiol. 2000; 50:2239-2244.

Parent taxon: Cellvibrio (ex Winogradsky 1929) Blackall et al. 1986

Assigned by: Humphry DR, Black GW, Cummings SP. Reclassification of 'Pseudomonas fluorescens subsp. cellulosa' NCIMB 10462 (Ueda et al. 1952) as Cellvibrio japonicus sp. nov. and revival of Cellvibrio vulgaris sp. nov., nom. rev. and Cellvibrio fulvus sp. nov., nom. rev. Int J Syst Evol Microbiol 2003; 53:393-400. 🇬🇧

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Record number: 774576