Name: Chromatium minutissimum Winogradsky 1888 (Approved Lists 1980)

Category: Species

Proposed as: sp. nov.

Etymology: mi.nu.tis’si.mum. L. adj. minutus -a -um, little, small; L. neut. adj. minutissimum, very small, smallest

Pronunciation (Latin), gender: k^hro-MA-ti-um mi-nu-TIS-si-mum, neuter

Type strain: DSM 1376; Glubokoe; KMMGU Glubokoe; MSU

See detailed strain information at

16S rRNA gene: Y12369 Analyse FASTA

Effective publication: Winogradsky S. Beiträge zur Morphologie und Physiologie der Bacterien. Heft I. Zur Morphologie und Physiologie der Schwefelbacterien. Arthur Felix, Leipzig, 1888.

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: Allochromatium minutissimum (Winogradsky 1888) Imhoff et al. 1998

Risk group: 1

• Synonyms:

  • Name	Kind
    Allochromatium minutissimum (Winogradsky 1888) Imhoff et al. 1998	homotypic synonym, validly published under the ICNP

• Notes:
  • ❗ Chromatium minutissimum 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 Chromatium.
  • 😷 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 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 48 times in PubMed until 2026-06-11.
  • 🧍 Genomic and phenotypic data suggest that there are not sufficient reasons to separate Chromatium minutissimum Winogradsky 1888 (Approved Lists 1980) from Chromatium vinosum (Ehrenberg 1838) Winogradsky 1888 (Approved Lists 1980). Publication: Pavón V, Gaju N. Genomic relationship of five species of the genus Chromatium by analysis of large restriction fragments (macrorestriction analysis) using pulsed-field gel electrophoresis. Int. J. Syst. Bacteriol. 1997; 47:586-589. 🇪🇸

Parent taxon: Chromatium Perty 1852 (Approved Lists 1980)

Assigned by: Winogradsky S. Beiträge zur Morphologie und Physiologie der Bacterien. Heft I. Zur Morphologie und Physiologie der Schwefelbacterien. Arthur Felix, Leipzig, 1888.

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Record number: 774683