Name: Rubrivivax gelatinosus (Molisch 1907) Willems et al. 1991

Category: Species

Proposed as: comb. nov.

Basonym: "Rhodocystis gelatinosa" Molisch 1907

Etymology: ge.la.ti.no’sus. N.L. neut. n. gelatinum, gelatin; from L. masc. perf. part. gelatus, frozen; L. adj. suff. -osus -a -um, suffix used with the sense of full of, prone to; N.L. masc. adj. gelatinosus, gelatinous

Pronunciation (Latin), gender: ru-bri-WI-wax ge-la-ti-NO-sus, masculine

Type strain: ATCC 17011; CCUG 15841; CCUG 21977; CCUG 21990; CIP 107072; DSM 1709; IFO 16663; JCM 21318; LMG 4311; NBRC 16663; NCIB 8290; NCIMB 8290

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: D16213 Analyse FASTA

Valid publication: Willems A, Gillis M, De Ley J. Transfer of Rhodocyclus gelatinosus to Rubrivivax gelatinosus gen. nov., comb. nov., and phylogenetic relationships with Leptothrix, Sphaerotilus natans, Pseudomonas saccharophila, and Alcaligenes latus. Int. J. Syst. Bacteriol. 1991; 41:65-73. 🇧🇪

IJSEM list: Anonymous. Notification list. Notification that new names and new combinations have appeared in volume 41, part 1 of the IJSB. Int J Syst Bacteriol 1991; 41:457-458.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 1

• Synonyms:

  • Name	Kind
    "Rhodocystis gelatinosa" Molisch 1907	homotypic synonym, not validly published, basonym of name in Approved Lists
    Rhodocyclus gelatinosus (Molisch 1907) Imhoff et al. 1984	homotypic synonym, validly published under the ICNP
    Rhodopseudomonas gelatinosa (Molisch 1907) van Niel 1944 (Approved Lists 1980)	homotypic synonym, validly published under the ICNP

• Notes:
  • 🥇 Nomenclatural type of the genus Rubrivivax Willems et al. 1991. Publication: Willems A, Gillis M, De Ley J. Transfer of Rhodocyclus gelatinosus to Rubrivivax gelatinosus gen. nov., comb. nov., and phylogenetic relationships with Leptothrix, Sphaerotilus natans, Pseudomonas saccharophila, and Alcaligenes latus. Int. J. Syst. Bacteriol. 1991; 41:65-73. 🇧🇪
  • 😷 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. — 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 129 times in PubMed until 2026-06-11.

Parent taxon: Rubrivivax Willems et al. 1991

Assigned by: Willems A, Gillis M, De Ley J. Transfer of Rhodocyclus gelatinosus to Rubrivivax gelatinosus gen. nov., comb. nov., and phylogenetic relationships with Leptothrix, Sphaerotilus natans, Pseudomonas saccharophila, and Alcaligenes latus. Int. J. Syst. Bacteriol. 1991; 41:65-73. 🇧🇪

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Record number: 780603