Name: Dichotomicrobium thermohalophilum Hirsch and Hoffmann 1989

Category: Species

Proposed as: sp. nov.

Etymology: ther.mo.ha.lo’phi.lum. Gr. fem. adj. thermê, heat; Gr. masc. n. hals (gen. halos), salt; N.L. adj. philus -a -um, friend, loving; from Gr. adj. philos -ê -on, loving; N.L. neut. adj. thermohalophilum, heat and salt loving

Gender: neuter

Type strain: ATCC 49408; DSM 5002; IFAM 954

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: FR733679 Analyse FASTA

Effective publication: Hirsch P, Hoffmann B. Dichotomicrobium thermohalophilum, gen. nov., spec. nov., budding prosthecate bacteria from the solar lake (Sinai) and some related strains. Syst. Appl. Microbiol. 1989; 11:291-301.

IJSEM list: Anonymous. Validation list no. 31. Validation of publication of new names and new combinations previously effectively published outside the IJSB. Int J Syst Bacteriol 1989; 39:495-497.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 1

• Emendations:
  • Hördt et al. 2020 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. Oren A, Garrity GM. List of changes in taxonomic opinion no. 32. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2020; 70:4061-4090.

• Notes:
  • 🥇 Nomenclatural type of the genus Dichotomicrobium Hirsch and Hoffmann 1989. Publication: Hirsch P, Hoffmann B. Dichotomicrobium thermohalophilum, gen. nov., spec. nov., budding prosthecate bacteria from the solar lake (Sinai) and some related strains. Syst. Appl. Microbiol. 1989; 11:291-301.
  • 😷 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.
  • 🎓 Name mentioned 0 times in PubMed until 2024-03-28.
  • 🧍 Yarza et al. (2013) expected for accession FR733679, originating from the alleged type-strain deposit DSM 5002, an affiliation with Hyphomicrobiaceae (Alphaproteobacteria) but observed an affiliation with a deep branch in Alphaproteobacteria and 93.77% similarity against Afifella pfennigii. Publication: Yarza P, Sproer C, Swiderski J, Mrotzek N, Spring S, Tindall BJ, Gronow S, Pukall R, Klenk HP, Lang E, et al. Sequencing orphan species initiative (SOS): Filling the gaps in the 16S rRNA gene sequence database for all species with validly published names. Syst Appl Microbiol 2013; 36:69-73.
  • 🧍 The 16S rRNA gene sequence of the type strain shows an unexpected affiliation with a deep branch in Alphaproteobacteria (93.77% similarity against Afifella pfennigii). Publication: Yarza P, Sproer C, Swiderski J, Mrotzek N, Spring S, Tindall BJ, Gronow S, Pukall R, Klenk HP, Lang E, et al. Sequencing orphan species initiative (SOS): Filling the gaps in the 16S rRNA gene sequence database for all species with validly published names. Syst Appl Microbiol 2013; 36:69-73.

Parent taxon: Dichotomicrobium Hirsch and Hoffmann 1989

Assigned by: Hirsch P, Hoffmann B. Dichotomicrobium thermohalophilum, gen. nov., spec. nov., budding prosthecate bacteria from the solar lake (Sinai) and some related strains. Syst. Appl. Microbiol. 1989; 11:291-301.

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Record number: 775767