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Taxon: Class Actinobacteria Stackebrandt et al. 1997 nom. illeg. (prokaryote)
 Entity: 

Authorship

SN2000 author citation:  Stackebrandt et al., 1997, nom. descript., nom. superfl.
Original name, rank & spelling:  Stackebrandt, E., Rainey, F.A. & Ward-Rainey, N.L. 1997. Int. J. Syst. Bacteriol. 47 (2): 483 ("classis nov., Stackebrandt, Rainey, and Ward-Rainey").
Description/Diagnosis in English:  loc. cit.

Attributes

Descriptive name ([nom. illeg.]: nom. descript.) [ICNP, 2025: Rule 8; Judicial Opinion 129: 3-4, 7 (>order)] Ref: D.R. Arahal et al. 2024. Judicial Opinion 129: 7.
Formerly Type order: not designated (nom. illeg.: sine typo) [ICNP, 2022: Rules 22, 27(3) ([sub]class; <2023)] Ref: J.P. Euzéby, 1997-present: [9 Apr 2009]. [false (2 Apr 2026)].
Later homotypic synonym (nom. illeg.[: superfl.]) [ICNP, 2019: Rules 24a, 51b(1)] Ref: LPSN, 2020-present. LPSN: [28 Nov 2025].

Types

Automatically typified subtaxon: Actinobacteridae (Subclass) Stackebrandt et al. 1997 Ref: S.J. Brands (comp.), 1989-present: [<2 Apr 2026]. [new] [implicit]
Type, by subsequent designation: Actinomycetales (Order) Buchanan 1917 (Approved Lists 1980) Ref: LPSN, 2020-present: [28 Nov 2025] (2022: Judicial Opinion 119 ≡).
Type genus, by inclusion within designated type: Actinomyces (Genus) Harz 1877 (Approved Lists 1980) Ref: LPSN, 2020-present: [2 Apr 2026]; 2 Apr 2026. [inferred]

Variants

Former rank: Actinobacteridae (Subclass) Stackebrandt et al. 1997 Ref: J.P. Euzéby, present: [15 Nov 2014]. [indirect]

Synonyms

Accepted name (objective): Actinomycetes (Class) Krassilnikov 1949 (Approved Lists 1980) Ref: LPSN, 2020-present: [9 Dec 2025] ("homotypic").
Senior objective synonym: Actinomycetes (Class) Krassilnikov 1949 (Approved Lists 1980) Ref: LPSN, 2020-present: [28 Nov 2025].
Including: Arthrobacteria (Class) Cavalier-Smith 2002 nom. rej.
Former name: Actinomycetes (Class) Krassilnikov 1949 (Approved Lists 1980) Ref: P.M. Kirk et al. (eds.), 2008: 8, 9.
©2004-2026 Universal Taxonomic Services
Last updated: 28 Aug 2026