Name: Rhodocyclus purpureus Pfennig 1978 (Approved Lists 1980)

Category: Species

Proposed as: sp. nov.

Etymology: pur.pu’re.us. L. masc. adj. purpureus, purple-colored, purple, violet

Pronunciation (Latin), gender: r^ho-do-KY-klus pur-PU-re-us, masculine

Type strain: 6770; DSM 168; LMG 7759

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: M34132 Analyse FASTA

Effective publication: Pfennig N. Rhodocyclus purpureus gen. nov. and sp. nov., a ring-shaped, vitamin B12-requiring member of the family Rhodospirillaceae. International Journal of Systematic Bacteriology 1978; 28:283-288.

IJSEM list: Skerman VBD, McGowan V, Sneath PHA. Approved lists of bacterial names. Int J Syst Bacteriol 1980; 30:225-420.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 1

• Notes:
  • 🥇 Nomenclatural type of the genus Rhodocyclus Pfennig 1978 (Approved Lists 1980). Publication: Pfennig N. Rhodocyclus purpureus gen. nov. and sp. nov., a ring-shaped, vitamin B12-requiring member of the family Rhodospirillaceae. International Journal of Systematic Bacteriology 1978; 28:283-288.
  • 😷 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 12 times in PubMed until 2026-06-11.

Parent taxon: Rhodocyclus Pfennig 1978 (Approved Lists 1980)

Assigned by: Pfennig N. Rhodocyclus purpureus gen. nov. and sp. nov., a ring-shaped, vitamin B12-requiring member of the family Rhodospirillaceae. International Journal of Systematic Bacteriology 1978; 28:283-288.

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Record number: 780483