Concise hierarchy

(Kingdom) Methanobacteriati - (Phylum) Methanobacteriota - (Class) Halobacteria

Subsequent positions

Halobacteria (Class) Grant et al. 2001 nom. inval.

Ref: W.D. Grant et al., 2001: 294. [assumed]

Current position

Halobacteria (Class) Grant et al. 2002

Ref: LPSN, 2020-present: [20 Nov 2025]; LPSN[20 Nov 2025].

Alternative positions

Euryarchaeota (Kingdom) Woese et al. 1990
Halobacteria (Class) Grant et al. 2001 nom. inval.	Ref: W.D. Grant et al., 2001: 294. [new position]
Halomebacteria (Class) Cavalier-Smith 2002 nom. rej.	Ref: T. Cavalier-Smith, 2002a: tbl. 1 (p. 14). [new position]

Historical positions

Halobacteria (Class) Grant et al. 2002	Ref: J.P. Euzéby, 2016: [31 Aug 2017].
Halobacteria (Class) Grant et al. 2002	Ref: M.A. Ruggiero et al., 2015b: table 2 (p. 2).
Halobacteria (Class) Grant et al. 2002	Ref: G.M. Garrity et al., 2007: 22.
Halomebacteria (Class) Cavalier-Smith 2002 nom. rej.	Ref: T. Cavalier-Smith, 2002a: tbl. 1 (p. 14). [new position]
Halobacteria (Class) Grant et al. 2001 nom. inval.	Ref: G.M. Garrity et al., 2001b: 2. [new position]
Halobacteria (Class) Grant et al. 2001 nom. inval.	Ref: W.D. Grant et al., 2001: 294; xv. [new position]
Halobacteria (Class) Grant et al. 2001 nom. inval.	Ref: G.M. Garrity & J.G. Holt, 2001a: [156]. [new position]

Number of Subtaxa

2026	Available in Systema Naturae 2000	7f;87g;171s
1989-present	Systema Naturae 2000: 20 Nov 2025	[7f;87g]
2016	J.P. Euzéby: [6 Sep 2017]	[1f;23g]
2007	G.M. Garrity et al.	[1f;22g;72s]
2001b	G.M. Garrity et al.: 2	[1f;15g]
2001	W.D. Grant et al.	[1f;14g]
2001a	G.M. Garrity & J.G. Holt: [156]	[1f;15g]
2000		1f15g