Name: Nitrobacter hamburgensis Bock et al. 2001

Category: Species

Proposed as: sp. nov.

Etymology: ham.bur.gen’sis. N.L. masc. adj. hamburgensis, pertaining to the city of Hamburg, Federal Republic of Germany, where the organism was first isolated

Pronunciation, gender: ham-bur-GEN-sis, masculine

Type strain: DSM 10229; NCIMB 13809; X14

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: L11663 Analyse FASTA

Effective publication: Bock E, Sundermeyer-Klinger H, Stackebrandt E. New facultative lithoautotrophic nitrite-oxidizing bacteria. Arch. Microbiol. 1983; 136:281-284.

IJSEM list: Anonymous. Validation list no. 78. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2001; 51:1-2.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 1

• Notes:
  • 🧬 The phylogenomic assignment score of this taxon is 0.11099 (N = 7).
  • 😷 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 21 times in PubMed until 2025-06-04.
  • 🧍 The phylogenetic position of this species was determined in a genome-scale analysis by Hördt et al. (2020). Publication: Hordt A, Lopez MG, Meier-Kolthoff JP, Schleuning M, Weinhold LM, Tindall BJ, Gronow S, Kyrpides NC, Woyke T, Goker M. Analysis of 1,000+ Type-Strain Genomes Substantially Improves Taxonomic Classification of Alphaproteobacteria. Front Microbiol 2020; 11:468.
  • 🧍 According to Rules 27(3) and 30, this name is not validly published, because the original publication makes reference to the deposit of the type strain in a single recognized culture collection. However, according to the Judicial Opinion 81, Nitrobacter hamburgensis Bock et al. 2001 is considered to be validly published, since deposit in a second culture collection in a different country has been documented. Publication: Euzeby JP, Tindall BJ. Status of strains that contravene Rules 27(3) and 30 of the Bacteriological Code. Request for an opinion. Int J Syst Evol Microbiol 2004; 54:293-301.
  • 🧍 The type strain DSM 10229 has been designated by E. Spieck in a personal communication to the Associate Editor, IJSEM. Publication: Anonymous. Validation list no. 78. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2001; 51:1-2.

Parent taxon: Nitrobacter Winogradsky 1892 (Approved Lists 1980)

Assigned by: Bock E, Sundermeyer-Klinger H, Stackebrandt E. New facultative lithoautotrophic nitrite-oxidizing bacteria. Arch. Microbiol. 1983; 136:281-284.

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Record number: 778672