Name: Methanobacteriota Garrity and Holt 2023

Category: Phylum

Proposed as: phyl. nov.

Etymology: Me.tha.no.bac.te.ri.o’ta. N.L. neut. n. Methanobacterium, type genus of the phylum; L. neut. pl. n. suff. -ota, ending to denote a phylum; N.L. neut. pl. n. Methanobacteriota, phylum of the genus Methanobacterium

Pronunciation (Latin), gender: me-t^ha-no-bak-te-ri-O-ta, neuter

Type genus: Methanobacterium Kluyver and van Niel 1936 (Approved Lists 1980)

Valid publication: Goker M, Oren A. Valid publication of four additional phylum names. Int J Syst Evol Microbiol 2023; 73:6024. 🇩🇪

IJSEM list: Oren A, Göker M. Notification list. Notification that new names and new combinations have appeared in volume 73, part 9 of the IJSEM. Int J Syst Evol Microbiol 2023; 73:6158.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

• Synonyms:

  • Name	Kind
    "Methanobacteraeota" Oren et al. 2015	homotypic synonym, not validly published
    "Methanobacteriota" Whitman et al. 2018	homotypic synonym, not validly published
    "Euryarchaeota" Garrity and Holt 2001	homotypic synonym, not validly published
    Halobacteriota Chuvochina et al. 2024	heterotypic synonym, validly published under the ICNP
    "Thermoplasmatota" Rinke et al. 2021	heterotypic synonym, not validly published
    Thermoplasmatota Chuvochina et al. 2024	heterotypic synonym, validly published under the ICNP
    "Halobacteriota" Rinke et al. 2021	heterotypic synonym, not validly published

• Notes:
  • 🧕 Göker and Oren (2023) assigned this phylum to the domain "Archaea" Woese et al. 1990. Publication: Goker M, Oren A. Valid publication of four additional phylum names. Int J Syst Evol Microbiol 2023; 73:6024. 🇩🇪
  • 🧕 Göker and Oren (2024) assigned this phylum to the domain Archaea Woese et al. 2024. Publication: Goker M, Oren A. Valid publication of names of two domains and seven kingdoms of prokaryotes. Int J Syst Evol Microbiol 2024; 74:6242. 🇩🇪
  • 🧒 Göker and Oren (2023) assigned the class "Thalassarchaea" to this phylum. Publication: Goker M, Oren A. Valid publication of four additional phylum names. Int J Syst Evol Microbiol 2023; 73:6024. 🇩🇪
  • 🧒 Göker and Oren (2023) assigned the genus Methanobacterium Kluyver and van Niel 1936 (Approved Lists 1980) to this phylum. Publication: Goker M, Oren A. Valid publication of four additional phylum names. Int J Syst Evol Microbiol 2023; 73:6024. 🇩🇪
  • 🧒 Göker and Oren (2023) assigned the genus "Candidatus Aciduliprofundum" Reysenbach et al. 2006 to this phylum. Publication: Goker M, Oren A. Valid publication of four additional phylum names. Int J Syst Evol Microbiol 2023; 73:6024. 🇩🇪
  • 🧒 Göker and Oren (2023) assigned the order "Candidatus Methanophagales" Borrel et al. 2019 to this phylum. Publication: Goker M, Oren A. Valid publication of four additional phylum names. Int J Syst Evol Microbiol 2023; 73:6024. 🇩🇪
  • 🧒 Göker and Oren (2023) assigned the order "Candidatus Syntropharchaeales" corrig. Borrel et al. 2019 to this phylum. Publication: Goker M, Oren A. Valid publication of four additional phylum names. Int J Syst Evol Microbiol 2023; 73:6024. 🇩🇪
  • 🧒 Göker and Oren (2023) assigned the order "Candidatus Altarchaeales" corrig. Probst et al. 2014 to this phylum. Publication: Goker M, Oren A. Valid publication of four additional phylum names. Int J Syst Evol Microbiol 2023; 73:6024. 🇩🇪
  • 🙄 This taxon name is occasionally misprinted (or affected by an OCR error) in some sources as: "Metanobacteriota".
  • 🧔 This taxon was discussed in a meeting of a Taxonomic Subcommittee of the ICSP. Publication: Dodsworth JA, Prakash O. International Committee on Systematics of Prokaryotes: subcommittee on the taxonomy of methanogenic archaea. Minutes of the closed, online meeting held 06 September 2023. Int J Syst Evol Microbiol 2024; 74:6569. 🇮🇳
  • 🧔 This taxon was discussed in a meeting of a Taxonomic Subcommittee of the ICSP. Publication: Oren A, Arahal DR, Ventosa A. International Committee on Systematics of Prokaryotes Subcommittee on the Taxonomy of Halobacteria and Subcommittee on the Taxonomy of Halomonadaceae: minutes of the joint open meeting, 25 November 2025, Oaxaca, Mexico. Int J Syst Evol Microbiol 2026; 76:7065. 🇮🇱
  • ✏ The authority of the taxon name (Garrity and Holt) deliberately differs from the authors of the publication (Göker and Oren).
  • 🎰 The BRCs most frequently used for deposits in this group are: JCM: 645; DSM: 488; CGMCC: 317; ATCC: 204; OCM: 127; NBRC: 126; CECT: 84; VKM: 78; KCTC: 73; CIP: 56.

Subdivision:

Number of child taxa with a validly published and correct name: 9
Number of child taxa with a validly published name, including synonyms: 16
Total number of child taxa: 30

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    Archaeobacteria Murray 1988	validly published under the ICNP, rejected name	synonym
    Archaeoglobea Cavalier-Smith 2002	validly published under the ICNP, rejected name	synonym
    Archaeoglobi Garrity and Holt 2002	validly published under the ICNP	correct name
    "Haloarchaeota" Spang et al. 2013	not validly published	synonym
    Halobacteria Grant et al. 2002	validly published under the ICNP	correct name
    Halomebacteria Cavalier-Smith 2002	validly published under the ICNP, rejected name	synonym
    "Candidatus Hikarchaeia" Martijn et al. 2020	not validly published	preferred name
    Methanobacteria Boone 2002	validly published under the ICNP	correct name
    "Methanocellia" Rinke et al. 2021	not validly published	synonym
    Methanocellia Chuvochina et al. 2024	validly published under the ICNP	synonym
    Methanococci Boone 2002	validly published under the ICNP	correct name
    "Candidatus Methanofastidiosa" Nobu et al. 2016	inaccurate spelling	misspelling
    "Candidatus Methanofastidiosia" corrig. Nobu et al. 2016	not validly published	pro-correct name
    "Candidatus Methanoliparia" Borrel et al. 2019	not validly published	pro-correct name
    "Methanomicrobia" Garrity et al. 2003	not validly published	synonym
    "Methanomicrobia" Brenner et al. 2005	not validly published	preferred name
    Methanonatronarchaeia Sorokin et al. 2018	validly published under the ICNP	correct name
    Methanopyri Garrity and Holt 2002	validly published under the ICNP	correct name
    "Methanosarcinia" Rinke et al. 2021	not validly published	synonym
    Methanosarcinia Chuvochina et al. 2024	validly published under the ICNP	correct name
    Methanothermea Cavalier-Smith 2002	validly published under the ICNP, rejected name	synonym
    "Candidatus Ordosarchaeia" Zhao et al. 2024	not validly published	preferred name
    "Candidatus Penumbrarchaeia" Maeke et al. 2025	not validly published	preferred name
    Picrophilea Cavalier-Smith 2002	validly published under the ICNP, rejected name	synonym
    Protoarchaea Cavalier-Smith 2002	validly published under the ICNP, rejected name	synonym
    "Candidatus Syntropharchaeia" Rinke et al. 2021	not validly published	preferred name
    "Candidatus Thalassarchaeia" corrig. Martin-Cuadrado et al. 2015	not validly published	preferred name
    "Candidatus Thalassoarchaea" Martin-Cuadrado et al. 2015	inaccurate spelling	misspelling
    Thermococci Zillig and Reysenbach 2002	validly published under the ICNP	correct name
    Thermoplasmata Reysenbach 2002	validly published under the ICNP	correct name

Parent taxon: Methanobacteriati (Garrity and Holt 2023) Oren and Göker 2024

Assigned by: Goker M, Oren A. Valid publication of names of two domains and seven kingdoms of prokaryotes. Int J Syst Evol Microbiol 2024; 74:6242. 🇩🇪

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Record number: 40255

• Previous versions:

  • Version	Date	JSON
    1	2026-03-31