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Taxon: Phylum "Proteobacteria" Garrity et al. 2005 stat. inval. (prokaryote)
 Entity: 

Authorship

SN2000 author citation:  (Stackebrandt et al., 1988) G.M. Garrity et al., in D.J. Brenner et al., eds., 2005/2005, nom. descript., stat. praeinit.
Unavailable original name, rank & spelling:  Garrity, G.M. & Holt, J.G. 2001a. In D.R. Boone & R.W. Castenholz (eds.), in G.M. Garrity (ed.), Bergey's Man. Syst. Bacteriol. (ed. 2) 1: 130. [working description].
Unavailable original name, rank & spelling:  Garrity, G.M., Bell, J.A. & Lilburn, T. 2005. In D.J. Brenner, N.R. Krieg & J.T. Staley (eds.), in G.M. Garrity (ed.), Bergey's Man. Syst. Bacteriol. (ed. 2) 2 (A): 171 ("phylum nov. Garrity and Holt 2001s, 130", "class Proteobacteria elevated to phylum"). [working description].
Original name, rank & spelling:  Garrity, G.M., Bell, J.A. & Lilburn, T. 2005. In D.J. Brenner, N.R. Krieg & J.T. Staley (eds.), in G.M. Garrity (ed.), Bergey's Man. Syst. Bacteriol. (ed. 2) 2 (B): 1 ("phyl. nov.").

Etymology

Derived name: Alphaproteobacteria (Class) Garrity et al. 2006 Ref: S.J. Brands (comp.), 1989-present: 2 May 2026.
Derived name: Betaproteobacteria (Class) Garrity et al. 2006 Ref: S.J. Brands (comp.), 1989-present: 2 May 2026.
Derived name: Deltaproteobacteria (Class) Kuever et al. 2006 Ref: S.J. Brands (comp.), 1989-present: 1 May 2026.
Derived name: Epsilonproteobacteria (Class) Garrity et al. 2006 Ref: S.J. Brands (comp.), 1989-present: 3 May 2026.
Derived name: Gammaproteobacteria (Class) Garrity et al. 2005 Ref: S.J. Brands (comp.), 1989-present: 3 May 2026.
Derived name: Lambdaproteobacteria (Phylum) Anantharaman et al. 2016 nom. nud. Ref: K. Anantharaman et al., 2016: tbl. 1 (p. 4). [new]
Derived name: Muproteobacteria (Phylum) Anantharaman et al. 2016 nom. nud. Ref: K. Anantharaman et al., 2016: tbl. 1 (p. 4). [new]

Eponymous persons

Proteus: ["Πρωτεύς"] Greek mythology: a sea god able to assume many shapes Ref: G.M. Garrity et al., 2005: 1. ("Gr. n. Proteus ocean god able to change shape")

Attributes

Pre-starting-point rank (stat. inval.[: praeinit.]) [ICNP, 2022: p. 1, Rules 5b, 8 (phylum, <2021)] Ref: S.J. Brands (comp.), 1989-present. Syst. Nat. 2000: 2 May 2026.
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, tbl. 2 (p. 6: "DN").

Types

Type, by original designation: Pseudomonadales (Order) Orla-Jensen 1921 (Approved Lists 1980) Ref: G.M. Garrity et al., 2005: 1. [new]

Variants

Not validly published name: Proteobacteria (Phylum) Garrity and Holt 2001 nom. nud. Ref: S.J. Brands (comp.), 1989-present: [<2 May 2026].
Validly published name: Pseudomonadota (Phylum) Garrity et al. 2021 Ref: D.R. Arahal et al., 2024: tbl. 2 (p. 6).
Current rank: Proteobacteria (Superphylum) Craig et al. 2010 stat. inval. Ref: Craig et al., 2010. [new] [inferred]

Synonyms

Including: Chromatibacteria (Infraphylum) Cavalier-Smith 1998
Including: Thiobacteria (Subphylum) Cavalier-Smith 1998
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Last updated: 28 Aug 2026