Name: Rhodococcus hoagii (Morse 1912) Kämpfer et al. 2014

Category: Species

Proposed as: comb. nov.

Basonym: "Bacillus hoagii" Morse 1912

Etymology: ho.ag’i.i. N.L. gen. masc. n. hoagii, of Hoag, named for Louis Hoag, the bacteriologist who first isolated this species

Gender: masculine

Type strain: ATCC 7005; CCUG 20991; CIP 81.17; DSM 20295; JCM 1319; NBRC 103062; NCTC 10673

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: X82052 Analyse FASTA

Valid publication: Kampfer P, Dott W, Martin K, Glaeser SP. Rhodococcus defluvii sp. nov., isolated from wastewater of a bioreactor and formal proposal to reclassify [Corynebacterium hoagii] and Rhodococcus equi as Rhodococcus hoagii comb. nov. Int J Syst Evol Microbiol 2014; 64:755-761.

IJSEM list: Oren A, Garrity GM. Notification list. Notification that new names and new combinations have appeared in volume 64, part 3 of the IJSEM. Int J Syst Evol Microbiol 2014; 64:1827-1829.

Nomenclatural status: validly published under the ICNP, rejected name

Taxonomic status: in need of a replacement

Risk group: 2

• Synonyms:

  • Name	Kind
    "Bacillus hoagii" Morse 1912	homotypic synonym, not validly published, basonym of name in Approved Lists
    Corynebacterium hoagii (Morse 1912) Eberson 1918 (Approved Lists 1980)	homotypic synonym, validly published under the ICNP, rejected name

• Emendations:
  • Nouioui et al. 2018 Nouioui I, Carro L, Garcia-Lopez M, Meier-Kolthoff JP, Woyke T, Kyrpides NC, Pukall R, Klenk HP, Goodfellow M, Goker M. Genome-Based Taxonomic Classification of the Phylum Actinobacteria. Front Microbiol 2018; 9:2007. Oren A, Garrity GM. List of changes in taxonomic opinion no. 29. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2019; 69:13-32.
    Notes:
    • 🫂 Emendation accompanied by a proposal regarding the synonymy of the species.

• Notes:
  • ⏰ According to Kaempfer et al. (2014), this species is an earlier heterotypic synonym of "Prescottella equi" (Magnusson 1923) Jones et al. 2013 but this is in conflict with the rules of the International Code of Nomenclature of Prokaryotes. Publication: Kampfer P, Dott W, Martin K, Glaeser SP. Rhodococcus defluvii sp. nov., isolated from wastewater of a bioreactor and formal proposal to reclassify [Corynebacterium hoagii] and Rhodococcus equi as Rhodococcus hoagii comb. nov. Int J Syst Evol Microbiol 2014; 64:755-761.
  • ⏰ According to Kaempfer et al. (2014), this species is an earlier heterotypic synonym of "Prescottia equi" (Magnusson 1923) Jones et al. 2013 but this is in conflict with the rules of the International Code of Nomenclature of Prokaryotes. Publication: Kampfer P, Dott W, Martin K, Glaeser SP. Rhodococcus defluvii sp. nov., isolated from wastewater of a bioreactor and formal proposal to reclassify [Corynebacterium hoagii] and Rhodococcus equi as Rhodococcus hoagii comb. nov. Int J Syst Evol Microbiol 2014; 64:755-761.
  • ⏰ According to Kaempfer et al. (2014), this species is an earlier heterotypic synonym of Corynebacterium equi Magnusson 1923 (Approved Lists 1980) but this is in conflict with the rules of the International Code of Nomenclature of Prokaryotes. Publication: Kampfer P, Dott W, Martin K, Glaeser SP. Rhodococcus defluvii sp. nov., isolated from wastewater of a bioreactor and formal proposal to reclassify [Corynebacterium hoagii] and Rhodococcus equi as Rhodococcus hoagii comb. nov. Int J Syst Evol Microbiol 2014; 64:755-761.
  • ⏰ According to Kaempfer et al. (2014), this species is an earlier heterotypic synonym of Rhodococcus equi (Magnusson 1923) Goodfellow and Alderson 1977 (Approved Lists 1980) but this is in conflict with the rules of the International Code of Nomenclature of Prokaryotes. Publication: Kampfer P, Dott W, Martin K, Glaeser SP. Rhodococcus defluvii sp. nov., isolated from wastewater of a bioreactor and formal proposal to reclassify [Corynebacterium hoagii] and Rhodococcus equi as Rhodococcus hoagii comb. nov. Int J Syst Evol Microbiol 2014; 64:755-761.
  • ⏰ According to Kaempfer et al. (2014), this species is an earlier heterotypic synonym of Prescottella equi (Magnusson 1923) Sangal et al. 2022 but this is in conflict with the rules of the International Code of Nomenclature of Prokaryotes. Publication: Kampfer P, Dott W, Martin K, Glaeser SP. Rhodococcus defluvii sp. nov., isolated from wastewater of a bioreactor and formal proposal to reclassify [Corynebacterium hoagii] and Rhodococcus equi as Rhodococcus hoagii comb. nov. Int J Syst Evol Microbiol 2014; 64:755-761.
  • ⏰ According to Nouioui et al. (2018), this species is an earlier heterotypic synonym of "Prescottella equi" (Magnusson 1923) Jones et al. 2013 but this is in conflict with the rules of the International Code of Nomenclature of Prokaryotes. Publication: Nouioui I, Carro L, Garcia-Lopez M, Meier-Kolthoff JP, Woyke T, Kyrpides NC, Pukall R, Klenk HP, Goodfellow M, Goker M. Genome-Based Taxonomic Classification of the Phylum Actinobacteria. Front Microbiol 2018; 9:2007.
  • ⏰ According to Nouioui et al. (2018), this species is an earlier heterotypic synonym of "Prescottia equi" (Magnusson 1923) Jones et al. 2013 but this is in conflict with the rules of the International Code of Nomenclature of Prokaryotes. Publication: Nouioui I, Carro L, Garcia-Lopez M, Meier-Kolthoff JP, Woyke T, Kyrpides NC, Pukall R, Klenk HP, Goodfellow M, Goker M. Genome-Based Taxonomic Classification of the Phylum Actinobacteria. Front Microbiol 2018; 9:2007.
  • ⏰ According to Nouioui et al. (2018), this species is an earlier heterotypic synonym of Corynebacterium equi Magnusson 1923 (Approved Lists 1980) but this is in conflict with the rules of the International Code of Nomenclature of Prokaryotes. Publication: Nouioui I, Carro L, Garcia-Lopez M, Meier-Kolthoff JP, Woyke T, Kyrpides NC, Pukall R, Klenk HP, Goodfellow M, Goker M. Genome-Based Taxonomic Classification of the Phylum Actinobacteria. Front Microbiol 2018; 9:2007.
  • ⏰ According to Nouioui et al. (2018), this species is an earlier heterotypic synonym of Rhodococcus equi (Magnusson 1923) Goodfellow and Alderson 1977 (Approved Lists 1980) but this is in conflict with the rules of the International Code of Nomenclature of Prokaryotes. Publication: Nouioui I, Carro L, Garcia-Lopez M, Meier-Kolthoff JP, Woyke T, Kyrpides NC, Pukall R, Klenk HP, Goodfellow M, Goker M. Genome-Based Taxonomic Classification of the Phylum Actinobacteria. Front Microbiol 2018; 9:2007.
  • ⏰ According to Nouioui et al. (2018), this species is an earlier heterotypic synonym of Prescottella equi (Magnusson 1923) Sangal et al. 2022 but this is in conflict with the rules of the International Code of Nomenclature of Prokaryotes. Publication: Nouioui I, Carro L, Garcia-Lopez M, Meier-Kolthoff JP, Woyke T, Kyrpides NC, Pukall R, Klenk HP, Goodfellow M, Goker M. Genome-Based Taxonomic Classification of the Phylum Actinobacteria. Front Microbiol 2018; 9:2007.
  • 🏢 Synonymy of this taxon was mentioned in an IJSEM list. Publication: Oren A, Garrity GM. List of changes in taxonomic opinion no. 29. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2019; 69:13-32.
  • 😷 The risk group for Belgium has been imported on 2024-02-05. The full classification is: risk group = 2, note = "human and animal pathogen - biological class of risk animal: 2". — The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 2, note = "ht". — The risk group for United Kingdom has been imported on 2024-01-31. The full classification is: risk group = 2.
  • 🎓 Name mentioned 23 times in PubMed until 2024-03-28.
  • 🧍 Rejected name (Opinion 106). Publication: Arahal et al. Judicial Opinion No. 111. Int J Syst Evol Microbiol 2022; 72:5197.

Parent taxon: Rhodococcus Zopf 1891 (Approved Lists 1980)

Assigned by: Kampfer P, Dott W, Martin K, Glaeser SP. Rhodococcus defluvii sp. nov., isolated from wastewater of a bioreactor and formal proposal to reclassify [Corynebacterium hoagii] and Rhodococcus equi as Rhodococcus hoagii comb. nov. Int J Syst Evol Microbiol 2014; 64:755-761.

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Record number: 791654