Name: Variovorax paradoxus (Davis 1969) Willems et al. 1991

Category: Species

Proposed as: comb. nov.

Basonym: Alcaligenes paradoxus Davis 1969 (Approved Lists 1980)

Etymology: pa.ra.do’xus. N.L. masc. adj. paradoxus, strange, contrary to all expectation, in reference to the chemolithotrophic and/or organotrophic metabolism of the organism

Gender: masculine

Type strain: ATCC 17713; CCUG 1777; CIP 103459; DSM 30034; IFO 15149; JCM 20526; JCM 20895; LMG 1797; NBRC 15149; VKM B-1329

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB622219 Analyse FASTA

Valid publication: Willems A, De Ley J, Gillis M, Kersters K. Comamonadaceae, a new family encompassing the acidovorans rRNA complex, including Variovorax paradoxus gen. nov., comb. nov., for Alcaligenes paradoxus (Davis) 1969. Int. J. Syst. Bacteriol. 1991; 41:445-450.

IJSEM list: Anonymous. Notification list. Notification that new names and new combinations have appeared in volume 41, part 2 of the IJSB. Int J Syst Bacteriol 1991; 41:581.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 1

• Synonyms:

  • Name	Kind
    Alcaligenes paradoxus Davis 1969 (Approved Lists 1980)	homotypic synonym, validly published under the ICNP

• Notes:
  • 🥇 Nomenclatural type of the genus Variovorax Willems et al. 1991. Publication: Willems A, De Ley J, Gillis M, Kersters K. Comamonadaceae, a new family encompassing the acidovorans rRNA complex, including Variovorax paradoxus gen. nov., comb. nov., for Alcaligenes paradoxus (Davis) 1969. Int. J. Syst. Bacteriol. 1991; 41:445-450.
  • 😷 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 Swiss Confederation has been imported on 2024-02-01. The full classification is: risk group = 1. — The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 1.
  • 🎓 Name mentioned 136 times in PubMed until 2024-03-28.

Parent taxon: Variovorax Willems et al. 1991

Assigned by: Willems A, De Ley J, Gillis M, Kersters K. Comamonadaceae, a new family encompassing the acidovorans rRNA complex, including Variovorax paradoxus gen. nov., comb. nov., for Alcaligenes paradoxus (Davis) 1969. Int. J. Syst. Bacteriol. 1991; 41:445-450.

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Record number: 782951