Name: Actinoalloteichus cyanogriseus Tamura et al. 2000

Category: Species

Proposed as: sp. nov.

Etymology: cy.a.no.gri.se.us. L. masc. adj. cyaneus, dark blue; M.L. masc. adj. griseus, grey; N.L. masc. adj. cyanogriseus, blue-grey

Gender: masculine

Type strain: CGMCC 4.1159; CIP 106755; DSM 43889; IFO 14455; JCM 6095; NBRC 14455; NRRL B-16252

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB006178 Analyse FASTA

Valid publication: Tamura T, Zhiheng L, Yamei Z, Hatano K. Actinoalloteichus cyanogriseus gen. nov., sp. nov. Int J Syst Evol Microbiol 2000; 50:1435-1440.

IJSEM list: Anonymous. Notification list. Notification that new names and new combinations have appeared in volume 50, part 4 of the IJSEM. Int J Syst Evol Microbiol 2000; 50:1701-1702.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym

Correct name: Actinoalloteichus caeruleus (Baldacci 1944) Teo et al. 2021

Risk group: 1

• Synonyms:

  • Name	Kind
    "Actinomyces caeruleus" Baldacci 1944	heterotypic synonym, not validly published, basonym of name in Approved Lists
    Streptomyces caeruleus (Baldacci 1944) Pridham et al. 1958 (Approved Lists 1980)	heterotypic synonym, validly published under the ICNP
    Actinoalloteichus caeruleus (Baldacci 1944) Teo et al. 2021	heterotypic synonym, validly published under the ICNP

• Notes:
  • 🥇 Nomenclatural type of the genus Actinoalloteichus Tamura et al. 2000. Publication: Tamura T, Zhiheng L, Yamei Z, Hatano K. Actinoalloteichus cyanogriseus gen. nov., sp. nov. Int J Syst Evol Microbiol 2000; 50:1435-1440.
  • ⏲ According to Teo et al. (2021), this species is a later heterotypic synonym of "Actinomyces caeruleus" Baldacci 1944. Publication: Teo WFA, Tan GYA, Li WJ. Taxonomic note on the family Pseudonocardiaceae based on phylogenomic analysis and descriptions of Allosaccharopolyspora gen. nov. and Halosaccharopolyspora gen. nov. Int J Syst Evol Microbiol 2021; 71:5075.
  • ⏲ According to Teo et al. (2021), this species is a later heterotypic synonym of Streptomyces caeruleus (Baldacci 1944) Pridham et al. 1958 (Approved Lists 1980). Publication: Teo WFA, Tan GYA, Li WJ. Taxonomic note on the family Pseudonocardiaceae based on phylogenomic analysis and descriptions of Allosaccharopolyspora gen. nov. and Halosaccharopolyspora gen. nov. Int J Syst Evol Microbiol 2021; 71:5075.
  • ⏲ According to Teo et al. (2021), this species is a later heterotypic synonym of Actinoalloteichus caeruleus (Baldacci 1944) Teo et al. 2021. Publication: Teo WFA, Tan GYA, Li WJ. Taxonomic note on the family Pseudonocardiaceae based on phylogenomic analysis and descriptions of Allosaccharopolyspora gen. nov. and Halosaccharopolyspora gen. nov. Int J Syst Evol Microbiol 2021; 71:5075.
  • ⏰ According to Tamura et al. (2008), this species is an earlier heterotypic synonym of "Actinomyces caeruleus" Baldacci 1944 but this is in conflict with the rules of the International Code of Nomenclature of Prokaryotes. Publication: Tamura T, Ishida Y, Otoguro M, Hatano K, Labeda D, Price NP, Suzuki K. Reclassification of Streptomyces caeruleus as a synonym of Actinoalloteichus cyanogriseus and reclassification of Streptomyces spheroides and Streptomyces laceyi as later synonyms of Streptomyces niveus. Int J Syst Evol Microbiol 2008; 58:2812-2814.
  • ⏰ According to Tamura et al. (2008), this species is an earlier heterotypic synonym of Streptomyces caeruleus (Baldacci 1944) Pridham et al. 1958 (Approved Lists 1980) but this is in conflict with the rules of the International Code of Nomenclature of Prokaryotes. Publication: Tamura T, Ishida Y, Otoguro M, Hatano K, Labeda D, Price NP, Suzuki K. Reclassification of Streptomyces caeruleus as a synonym of Actinoalloteichus cyanogriseus and reclassification of Streptomyces spheroides and Streptomyces laceyi as later synonyms of Streptomyces niveus. Int J Syst Evol Microbiol 2008; 58:2812-2814.
  • ⏰ According to Tamura et al. (2008), this species is an earlier heterotypic synonym of Actinoalloteichus caeruleus (Baldacci 1944) Teo et al. 2021 but this is in conflict with the rules of the International Code of Nomenclature of Prokaryotes. Publication: Tamura T, Ishida Y, Otoguro M, Hatano K, Labeda D, Price NP, Suzuki K. Reclassification of Streptomyces caeruleus as a synonym of Actinoalloteichus cyanogriseus and reclassification of Streptomyces spheroides and Streptomyces laceyi as later synonyms of Streptomyces niveus. Int J Syst Evol Microbiol 2008; 58:2812-2814.
  • 🏢 Synonymy of this taxon was mentioned in an IJSEM list. Publication: Oren A, Garrity GM. Notification list. Notification that new names and new combinations have appeared in volume 71, part 10 of the IJSEM. Int J Syst Evol Microbiol 2022; 72:5165.
  • 📧 The e-mail address of the corresponding author given in the effective publication is not functional any more.
  • ❗ Actinoalloteichus cyanogriseus 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 Actinoalloteichus.
  • 😷 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 21 times in PubMed until 2024-03-27.
  • 🧍 The genome of the type strain was sequenced as part of the GEBA (Genomic Encyclopedia of Bacteria and Archaea) project. 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.

Parent taxon: Actinoalloteichus Tamura et al. 2000

Assigned by: Tamura T, Zhiheng L, Yamei Z, Hatano K. Actinoalloteichus cyanogriseus gen. nov., sp. nov. Int J Syst Evol Microbiol 2000; 50:1435-1440.

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Record number: 772655