Name: Armatimonadota Tamaki et al. 2021

Category: Phylum

Proposed as: phyl. nov.

Etymology: Ar.ma.ti.mo.na.do’ta. N.L. fem. n. Armatimonas, type genus of the phylum; L. neut. pl. n. suff. -ota, ending to denote a phylum; N.L. neut. pl. n. Armatimonadota, the Armatimonas phylum

Pronunciation (Latin), gender: ar-ma-ti-mo-na-DO-ta, neuter

Type genus: Armatimonas Tamaki et al. 2011

Valid publication: Oren A, Garrity GM. Valid publication of the names of forty-two phyla of prokaryotes. Int J Syst Evol Microbiol 2021; 71:5056. 🇮🇱

IJSEM list: 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.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

• Synonyms:

  • Name	Kind
    "Armatimonadota" Whitman et al. 2018	homotypic synonym, not validly published
    "Candidatus Fervidibacterota" corrig. Rinke et al. 2013	heterotypic synonym, pro-validly published under the ICNP
    "Candidatus Fervidibacteria" Rinke et al. 2013	heterotypic synonym, inaccurate spelling
    "Armatimonadetes" Tamaki et al. 2011	homotypic synonym, not validly published
    "Armatimonadaeota" Oren et al. 2015	homotypic synonym, not validly published

• Notes:
  • 🧕 Göker and Oren (2024) assigned this phylum to the domain Bacteria 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. 🇩🇪
  • 🧕 Oren and Garrity (2021) assigned this phylum to the domain "Bacteria" Woese et al. 1990. Publication: Oren A, Garrity GM. Valid publication of the names of forty-two phyla of prokaryotes. Int J Syst Evol Microbiol 2021; 71:5056. 🇮🇱
  • 🧒 Carlton et al. (2023) assigned the class "Candidatus Hebobacteria" Carlton et al. 2023 to this phylum. Publication: Carlton JD, Langwig MV, Gong X, Aguilar-Pine EJ, Vazquez-Rosas-Landa M, Seitz KW, Baker BJ, De Anda V. Expansion of Armatimonadota through marine sediment sequencing describes two classes with unique ecological roles. ISME Commun 2023; 3:64. 🇺🇸
  • 🧒 Nou et al. (2025) assigned the family Fervidibacteraceae Nou et al. 2025 to this phylum. Publication: Nou NO, Covington JK, Lai D, Mayali X, Seymour CO, Johnston J, Jiao JY, Buessecker S, Mosier D, Muok AR, et al. Author Correction: Genome-guided isolation of the hyperthermophilic aerobe Fervidibacter sacchari reveals conserved polysaccharide metabolism in the Armatimonadota. Nat Commun 2025; 16:4015. 🇺🇸
  • 🧒 Oren and Garrity (2021) assigned the class Chthonomonadetes Lee et al. 2011 to this phylum. Publication: Oren A, Garrity GM. Valid publication of the names of forty-two phyla of prokaryotes. Int J Syst Evol Microbiol 2021; 71:5056. 🇮🇱
  • 🧒 Oren and Garrity (2021) assigned the genus Armatimonas Tamaki et al. 2011 to this phylum. Publication: Oren A, Garrity GM. Valid publication of the names of forty-two phyla of prokaryotes. Int J Syst Evol Microbiol 2021; 71:5056. 🇮🇱
  • 🙄 This taxon name is occasionally misprinted (or affected by an OCR error) in some sources as: "Armantimonadota".
  • ✏ The authority of the taxon name (Tamaki et al.) deliberately differs from the authors of the publication (Oren and Garrity).
  • 🎰 The BRCs most frequently used for deposits in this group are: DSM: 5; JCM: 3; NBRC: 2; ICMP: 1; KACC: 1.

Subdivision:

Number of child taxa with a validly published and correct name: 4
Number of child taxa with a validly published name, including synonyms: 4
Total number of child taxa: 10

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    Armatimonadia Tamaki et al. 2011	validly published under the ICNP	correct name
    [Armatimonadota, not assigned to class]	artificial parent node of taxa incertae sedis
    Chthonomonadetes Lee et al. 2011	inaccurate spelling	misspelling
    Chthonomonadia corrig. Lee et al. 2011	validly published under the ICNP	correct name
    Fervidibacteria Nou et al. 2025	validly published under the ICNP	correct name
    "Fervidibacteria" Nou et al. 2024	not validly published	synonym
    Fimbriimonadia Im et al. 2012	validly published under the ICNP	correct name
    "Candidatus Hebobacteria" Carlton et al. 2023	inaccurate spelling	misspelling
    "Candidatus Heboniibacteriia" corrig. Carlton et al. 2023	not validly published	preferred name
    "Candidatus Zipacnadia" Carlton et al. 2023	not validly published	preferred name

Parent taxon: Bacillati (Gibbons and Murray 1978) 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: 56334