Name: Rhodospirillum tenue Pfennig 1969 (Approved Lists 1980)

Category: Species

Proposed as: sp. nov.

Etymology: te’nu.e. L. neut. adj. tenue, slender, thin

Pronunciation, gender: … TE-nu-e, neuter

Type strain: 2761; ATCC 19137; ATCC 25093; DSM 109; Grunenplan; LMG 4367; NBRC 102472

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: D16208 Analyse FASTA

Effective publication: Pfennig N. Rhodospirillum tenue sp. n., a new species of the purple nonsulfur bacteria. J Bacteriol 1969; 99:619-620.

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: synonym

Correct name: Rhodocyclus tenuis (Pfennig 1969) Imhoff et al. 1984

Risk group: 1

• Synonyms:

  • Name	Kind
    Rhodocyclus tenuis (Pfennig 1969) Imhoff et al. 1984	homotypic synonym, validly published under the ICNP

• Notes:
  • ❗ Rhodospirillum tenue 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 Rhodospirillum.
  • 😷 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 22 times in PubMed until 2025-06-04.
  • 🧍 On the Approved Lists of Bacterial Names and on the Approved Lists of Bacterial Names (Amended Edition), the page numbers of the paper by Pfennig are erroneously cited as 619-920. Publication: Skerman VBD, McGowan V, Sneath PHA. Approved lists of bacterial names. Int J Syst Bacteriol 1980; 30:225-420.

Parent taxon: Rhodospirillum Molisch 1907 (Approved Lists 1980)

Assigned by: Pfennig N. Rhodospirillum tenue sp. n., a new species of the purple nonsulfur bacteria. J Bacteriol 1969; 99:619-620.

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Record number: 780524