List of Archaea genera

Last updated

This article lists the genera of the Archaea and also shows taxa of archaea that do not contain genera. The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN) [1] and National Center for Biotechnology Information (NCBI) [2] unless otherwise noted.

Contents

Phylogeny

For the GTDB phylogeny, National Center for Biotechnology Information (NCBI) taxonomy was initially used to decorate the genome tree via tax2tree. The 16S rRNA-based Greengenes taxonomy is used to supplement the taxonomy particularly in regions of the tree with no cultured representatives. List of Prokaryotic names with Standing in Nomenclature (LPSN) is used as the primary taxonomic authority for establishing naming priorities. Taxonomic ranks are normalised using Phylorank and the taxonomy manually curated to remove polyphyletic groups. [3] [4] [5] [6] [7]

Cladogram was taken from the GTDB release 10-RS226 (16 April 2025). [8] [9] [10]

Archaea

Phylum Microcaldota

Class Microcaldia

Order Microcaldales

  • Family Microcaldaceae Sakai et al. 2023

Phylum "Altarchaeota"

Class "Altarchaeia"

Order "Altarchaeales"

  • Family "Altarchaeaceae" corrig. Probst et al. 2014

Phylum "Iainarchaeota"

Class "Iainarchaeia"

Order "Forterreales"

  • Family "Forterreaceae" Pallen, Rodriguez-R & Alikhan 2022 [CSSED10-239]
    • "Candidatus Forterrea" Probst & Banfield 2017

Order "Iainarchaeales"

  • Family "Iainarchaeaceae" Rinke et al. 2020

Phylum "Micrarchaeota"

Phylogeny of "Micrarchaeota" [8] [9] [10]
"Norongarragalinales"

"Ca. Norongarragalina"

"Micrarchaeales"
"Micrarchaeaceae"
"Anstonellales"
"Anstonellaceae"

"Ca. Anstonella"

"Bilamarchaeaceae"

"Ca. Bilamarchaeum"

"Gugararchaeales"

"Ca. Gugararchaeum"

"Burarchaeales"

"Ca. Burarchaeum"

"Fermentimicrarchaeales"

"Ca. Fermentimicrarchaeum"

Class "Micrarchaeia"

Order "Norongarragalinales"

  • Family "Norongarragalinaceae" Vázquez-Campos et al. 2021

Order "Micrarchaeales"

  • Family "Micrarchaeaceae" Vázquez-Campos et al. 2021

Order "Anstonellales"

  • Family "Anstonellaceae" Vázquez-Campos et al. 2021
    • "Candidatus Anstonella" Vázquez-Campos et al. 2021
  • Family "Bilamarchaeaceae" Vázquez-Campos et al. 2021

Order "Gugararchaeales"

  • Family "Gugararchaeaceae" Vázquez-Campos et al. 2021

Order "Burarchaeales"

  • Family "Burarchaeaceae" Vázquez-Campos et al. 2021

Order "Fermentimicrarchaeales"

  • Family "Fermentimicrarchaeaceae" Kadnikov et al. 2020 (Sv326)

Phylum "Undinarchaeota"

Class "Undinarchaeia"

Order "Undinarchaeales"

  • Family "Naiadarchaeaceae" Dombrowski et al. 2020
  • Family "Undinarchaeaceae" Dombrowski et al. 2020

Phylum "Huberarchaeaota"

Class "Huberarchaeia"

Order "Huberarchaeales"

  • Family "Huberarchaeaceae" Rinke et al. 2020

Phylum "Aenigmatarchaeota"

Class "Aenigmatarchaeia"

Order "Aenigmatarchaeales"

  • Family "Aenigmatarchaeaceae" corrig. Rinke et al. 2020

Phylum "Nanohalarchaeota"

Class "Nanohalarchaeia"

Order "Nanohalarchaeales"

  • Family "Nanohalarchaeaceae"

Order "Nanohydrothermales"

  • Family "Nanohydrothermaceae" Xie et al. 2022

Order "Nucleotidisoterales"

  • Family "Nanosalenecaceae" Xie et al. 2022
  • Family "Nucleotidisoteraceae" Xie et al. 2022
  • Family "Nucleotidivindicaceae" Xie et al. 2022

Class "Nanohalobiia"

Order "Nanohalobiales"

Phylogeny of "Nanohalobiales" [8] [9] [10]
"Nanohalalkaliarchaeaceae"

"Candidatus Nanohalalkaliarchaeum"

"Nanoanaerosalinaceae"

"Candidatus Asbonarchaeum"

"Candidatus Nanoanaerosalina"

"Nanohalobiaceae"

"Candidatus Nanosalinicola"

"Candidatus Nanohalococcus"

"Candidatus Nanohalobium"

"Candidatus Nanohalovita"

"Candidatus Nanosalina"

Phylum Nanobdellota

Phylogeny of Nanobdellota [8] [9] [10]
Nanobdellales
"Nanoarchaeaceae"

" Nanoarchaeum "

Nanobdellaceae
"Tiddalikarchaeales"
"Tiddalikarchaeaceae"

"Ca. Tiddalikarchaeum"

"Jingweiarchaeales"
"Jingweiarchaeaceae"

"Ca. Jingweiarchaeum"

"JAPDLS01"
"Haiyanarchaeaceae"

"Ca. Haiyanarchaeum"

"Parvarchaeales"
"Parvarchaeaceae"

Class Nanobdellia

Order "Pacearchaeales"

Order "Woesearchaeales"

Order Nanobdellales

  • Family "Nanoarchaeaceae" Huber et al. 2011
  • Family Nanobdellaceae Kato et al. 2022 ["Nanopusillaceae" Huber et al. 2011]

Order "Tiddalikarchaeales"

  • Family "Tiddalikarchaeaceae" Vázquez-Campos et al. 2021

Order "Jingweiarchaeales"

  • Family "Jingweiarchaeaceae" Rao et al. 2023

Order JAPDLS01

  • Family "Haiyanarchaeaceae" Rao et al. 2023
    • "Candidatus Haiyanarchaeum" Rao et al. 2023 ["Ca. Tinosarcha" Pallen, Rodriguez-R & Alikhan 2022]

Order "Parvarchaeales"

Phylum Promethearchaeota

Taxonomy of this group is based on LPSN, [1] and also these works: [11] [12] [13] [14]

Phylogeny of "Asgardarchaeota" [8] [9] [10]
"Asgardarchaeia"

"Asgardarchaeales"

"Atabeyarchaeia"

"Atabeyarchaeales"

"Wukongarchaeia"

"Wukongarchaeales"

"Njordarchaeia"

"Njordarchaeales"

"Heimdallarchaeia"

Promethearchaeota incertae sedis

Class "Asgardarchaeia"

Order "Asgardarchaeales"

  • Family "Asgardarchaeaceae" Eme et al. 2023 ex Tamarit et al. 2024

Class "Atabeyarchaeia"

Order "Atabeyarchaeales"

  • Family "Atabeyarchaeaceae" Valentin-Alvaradoet al. 2024

Class "Sifarchaeia"

Order "Sifarchaeales"

  • Family "Sifarchaeaceae" Sun et al. 2021
    • "Candidatus Sifarchaeum" corrig. Farag, Zhao & Biddle 2020

Order "Borrarchaeales"

  • Family "Borrarchaeaceae" Liu et al. 2021

Class "Wukongarchaeia"

Order "Wukongarchaeales"

  • Family "Wukongarchaeaceae" Liu et al. 2021

Class "Njordarchaeia"

Order "Njordarchaeales"

  • Family "Panguiarchaeaceae" Qu et al. 2023
  • Family "Njordarchaeaceae" Xie et al. 2022

Class "Heimdallarchaeia"

Order "Wenzhongarchaeales"

Order "Hodarchaeales"

  • Family "Hodarchaeaceae" Liu et al. 2021
  • Family "Margulisarchaeaceae" Imachi et al. 2025

Order "Gerdarchaeales"

Order "Heimdallarchaeales"

  • Family "Kariarchaeaceae" Liu et al. 2021
  • Family "Heimdallarchaeaceae" Wu et al. 2022

Class "Odinarchaeia"

Order "Odinarchaeales"

  • Family "Odinarchaeaceae" Tamarit et al. 2022

Order "Yangjianarchaeales"

Class "Jordarchaeia"

Order "Jordarchaeales"

  • Family "Freyrarchaeaceae" Xie et al. 2022
  • Family "Jordarchaeaceae" Sun et al. 2021
    • "Candidatus Jordarchaeum" Sun et al. 2021 ["Ca. Freyarchaeum" (sic) Valentin-Alvarado et al. 2024]

Class "Baldrarchaeia"

Order "Baldrarchaeales"

  • Family "Baldrarchaeaceae" corrig. Liu et al. 2021

Class "Thorarchaeia"

Order "Thorarchaeales"

  • Family "Thorarchaeaceae" (MBG-B)

Class "Hermodarchaeia"

Order "Hermodarchaeales"

  • Family "Hermodarchaeaceae" corrig. Liu et al. 2021

Class Promethearchaeia

Order "Helarchaeales"

Order Promethearchaeales

Phylogeny of "Promethearchaeales" [8] [9] [10]
"Sigynarchaeaceae"

"Ca. Sigynarchaeum"

Promethearchaeaceae

Phylum "Korarchaeota"

Class "Korarchaeia"

Order "Korarchaeales"

Phylum Thermoproteota

Phylogeny of Thermoproteota [8] [9] [10]

Thermoproteota Incertae sedis

"Brockiarchaeota"

Class "Bathyarchaeia"

Order "Bifangarchaeales"

  • Family "Bifangicolaceae" Hou et al. 2023
    • ?"Candidatus Bifangicola" Hou et al. 2023 [3300025546_26]
  • Family "Bifangarchaeaceae" Hou et al. 2023
    • "Candidatus Bifangarchaeum" corrig. Hou et al. 2023 [B24: DTBU01 sp011374155]
  • Family "Bifangistellaceae" Hou et al. 2023
    • "Candidatus Bifangistella" Hou et al. 2023 [DRYS01: DRYS01 sp011367275]

Order "Xuanwuarculales"

  • Family "Mazuisomaceae" Hou et al. 2023
  • Family "Mazuicellaceae" Hou et al. 2023
  • Family "Mazuousiaecae" Hou et al. 2023
  • Family "Xuanwuarculaceae" Hou et al. 2023
    • "Candidatus Xuanwuarcula" Hou et al. 2023 [RBG-16-48-13 sp001775995]

Order "Hecatellales"

Phylogeny of "Hecatellales" [8] [9] [10]
"Hecatellaceae"
  • Family "Hecatellaceae" Rinke et al. 2020

Order "Houtuarculales"

Phylogeny of "Houtuarculales" [8] [9] [10]
"Crenohoutuithermaceae"

"Ca. Crenohoutuithermus"

"Fontihoutuithermaceae"

"Ca. Fontihoutuithermus"

"Aphrohoutuibellaceae"
"Houtuousiaceae"

"Ca. Houtuousia"

"Houtuarculaceae"

"Ca. Houtuarcula"

  • Family "Houtuithermaceae" Hou et al. 2023
  • Family "Marihoutuimonadaceae" Hou et al. 2023
  • Family "Crenohoutuithermaceae" Hou et al. 2023
  • Family "Fontihoutuithermaceae" Hou et al. 2023
  • Family "Aphrohoutuibellaceae" Hou et al. 2023
  • Family "Houtuousiaceae" Hou et al. 2023
    • "Candidatus Houtuousia" Hou et al. 2023 [40CM-2-53-6]
  • Family "Houtuarculaceae" Hou et al. 2023

Order "Wuzhiqiibiales"

Phylogeny of "Wuzhiqiibiales" [8] [9] [10]
"Wuzhiqiimorphaceae"

"Ca. Wuzhiqiimorpha"

"Wuzhiqiimonadaceae"

"Ca. Wuzhiqiimonas"

"Wuzhiqiibiaceae"

"Ca. Wuzhiqiibium"

  • Family "Wuzhiqiithermaceae" Hou et al. 2023
  • Family "Wuzhiqiitorraceae" Hou et al. 2023
  • Family "Wuzhiqiimorphaceae" Hou et al. 2023
    • "Candidatus Wuzhiqiimorpha" Hou et al. 2023 [PIYN01: PIYN01 sp003601775]
  • Family "Wuzhiqiimonadaceae" Hou et al. 2023
  • Family "Wuzhiqiibiaceae" Hou et al. 2023

Order "Zhuquarculales"

  • Family "Zhuquarculaceae" Hou et al. 2023
  • Family "Zhuquomorphaceae" Hou et al. 2023

Order "Bathyarchaeales"

Phylogeny of "Bathyarchaeales" [8] [9] [10]
"Pontizhurongicolaceae"

"Ca. Pontizhurongicola"

"Hanbarchaeaceae"
"Marizhurongicellaceae"
"Hanbopyraceae"

"Ca. Hanbopyrus"

"Jingweiiplasmataceae"

"Ca. Jingweiiplasma"

"Bathyarchaeaceae"
"Bathycorpusculaceae"
  • Family "Actozhurongousiaceae" Hou et al. 2023
  • Family "Yuguousiaceae" Hou et al. 2023
  • Family "Pontizhurongicolaceae" Hou et al. 2023
  • Family "Hanbarchaeaceae" Hou et al. 2023
    • "Candidatus Fufeiimorpha" Hou et al. 2023 [PIYB01]
    • "Candidatus Hanbarchaeum" Hou et al. 2023 [DTEX01]
    • "Candidatus [[Zhurongicella]" Hou et al. 2023 [B63]
  • Family "Marizhurongicellaceae" Hou et al. 2023 [B26-1]
  • Family "Hanbopyraceae" Hou et al. 2023
    • "Candidatus Hanbopyrus" Hou et al. 2023 [WUQV01 sp009889585]
  • Family "Jingweiiplasmataceae" Hou et al. 2023
  • Family "Bathyarchaeaceae" Khomyakova et al. 2023
  • Family "Bathycorpusculaceae" Loh & Brune 2023 [UBA233]

Class Nitrososphaeria_A

Order "Caldarchaeales"

Phylogeny of "Caldarchaeales" [8] [9] [10]
"Calditenuaceae"

"Ca. Calditenuis"

"Caldarchaeaceae"
"Wolframiiraptoraceae"
  • Family "Calditenuaceae" Balbay et al. 2023
  • Family "Caldarchaeaceae" Rinke et al. 2020
    • "Candidatus Caldarchaeum" corrig. Nunoura et al. 2011
    • "Candidatus Pelearchaeum" Balbay et al. 2023 ["Ca. Cadrafarcha" Pallen, Rodriguez-R & Alikhan 2022]
  • Family "Wolframiiraptoraceae" Buessecker et al. 2022

Class Nitrososphaeria

Nitrososphaeria incertae sedis

Order "Geothermarchaeales"

Order PSMU01

Order "Conexivisphaerales"

  • Family "Conexivisphaeraceae" Kato et al. 2021 (THSC Group)

Order Nitrososphaerales

Phylogeny of Nitrososphaerales [8] [9] [10]

Class "Methanomethylicia"

Order "Nezhaarchaeales"

Order "Culexarchaeles"

  • Family "Culexarchaeaceae" Kohtz et al. 2022 ["Methanomediaceae" Berghuis et al. 2019]
    • "Candidatus Culexarchaeum" Kohtz et al. 2022 ["Ca. Methanomedium" Berghuis et al. 2019]
  • Family "Culexmicrobiaceae" Kohtz et al. 2022

Order "Methanosuratincolales"

Class Thermoproteia

Order "Gearchaeales"

  • Family "Gearchaeaceae" corrig.

Order Thermofilales

Order Thermoproteales

Phylogeny of Thermoproteales [8] [9] [10]

Class "Sulfolobia"

Order "Tardisphaerales"

Order Sulfolobales

Phylogeny of Sulfolobales [8] [9] [10]

Phylum "Hadarchaeota"

Class "Persephonarchaeia"

Class "Hadarchaeia"

Order "Hadarchaeales"

  • Family "Cerberiarchaeaceae" Benito Merino et al. 2024
  • Family "Hadarchaeaceae" Chuvochina et al. 2019 ex Chuvochina et al. 2023

Phylum Methanobacteriota_B

Class "Theionarchaeia"

Class Thermococci

Phylogeny of Thermococci [8] [9] [10]

Order "Methanofastidiosales"

  • Family "Methanofastidiosaceae" Rinke et al. 2020

Order Thermococcales

Phylum "Hydrothermarchaeota"

Class "Hydrothermarchaeia"

Order "Hydrothermarchaeales"

  • Family BMS3B
  • Family "Hydrothermarchaeaceae" Chuvochina et al. 2019

Phylum Methanobacteriota

Phylogeny of Methanobacteriota [8] [9] [10]

Class "Methanococcia"

Order Methanococcales

Class Methanopyria

Order Methanopyrales

Class Methanobacteriia

Order Methanobacteriales

Phylum Thermoplasmatota

Phylogeny of Thermoplasmatota [8] [9] [10]

Class "Izemarchaea"

Order "Thermoprofundales"

  • (MBG-D, E2)

Class "Poseidoniia"

Order MGIII

Order "Poseidoniales"

  • Family "Poseidoniaceae" Rinke et al. 2019
  • Family "Thalassarchaeaceae" Rinke et al. 2019

Class "Penumbrarchaeia"

Order "Penumbrarchaeales"

  • Family "Penumbrarchaeaceae" Maeke et al. 2025
    • "Candidatus Penumbrarchaeum" Maeke et al. 2025 [EX4484-36: EX4484-36: EX4484-6: GCA_965234725.1]

Class Thermoplasmata

Order "Angelarchaeales"

Order "Lunaplasmatales"

  • Family "Lunaplasmataceae" corrig. Zinke et al. 2021

Order "Proteinoplasmatales"

  • (SG8-5)

Order "Yaplasmatales"

  • (RBG-16-68-12) [incl. "Detorarchales" Pallen & Alikhan 2021; "Limitiplasmatales" corrig. Zheng et al. 2022]

Order "Gimiplasmatales"

  • Family "Gimiplasmataceae" Hu et al. 2020

Order "Sysuiplasmatales"

  • Family "Sysuiplasmataceae" Yuan et al. 2021

Order Methanomassiliicoccales

Phylogeny of Methanomassiliicoccales [8] [9] [10]

Order "Halarchaeoplasmatales"

Phylogeny of "Halarchaeoplasmatales" [8] [9] [10]

"Candidatus Haladaptiplasma"

"Candidatus Halarchaeoplasma"

"Candidatus Natronoplasma"

"Candidatus Saliniplasma"

Order "Lutacidiplasmatales"

  • Family "Lutacidiplasmataceae" Sheridan et al. 2022

Order "Aciduliprofundales"

  • Family "Aciduliprofundaceae" Rinke et al. 2020

Order Thermoplasmatales

Phylogeny of Thermoplasmatales [8] [9] [10]

Phylum Halobacteriota

Phylogeny of Halobacteriota [8] [9] [10]

Halobacteriota incertae sedis

Class "Methanonatronarchaeia"

Order "Methanonatronarchaeales"

Class "Methanoliparia"

Order "Methanoliparales"

Class "Archaeoglobia"

Phylogeny of "Archaeoglobia" [8] [9] [10]
"Mnemosynellales"
"Mnemosynellaceae"

"Ca. Mnemosynella"

Archaeoglobales

Order "Mnemosynellales"

  • Family "Mnemosynellaceae" Adam et al. 2022

Order Archaeoglobales

Class "Syntropharchaeia"

Order "Aerarchaeales"

  • Family YL-1
  • Family "Aerarchaeaceae" Leu et al. 2025 [CG-2]
    • "Candidatus Aerarchaeum" Leu et al. 2025 (GG-2)
    • "Candidatus Aerovita" Leu et al. 2025 (CM-1, CG-1, MW-1)

Order "Syntropharchaeales"

  • Family "Syntropharchaeaceae" (ANME-2 cluster)

Order "Alkanophagales"

  • Family "Methanophagaceae" Chadwick et al. 2022
  • Family ?"Veteromethanophagaceae" Vulcano et al. 2022
  • Family "Alkanophagaceae" [B39-G2]
  • Family "Methanospiraraceae" Laso-Pérez et al. 2022

Class Methanocellia

Order Methanocellales

Phylogeny of Methanocellales [8] [9] [10]

Class Methanosarcinia

Order Methanotrichales

Order Methanosarcinales_A

Family Methermicoccaceae Cheng et al. 2007

Order Methanosarcinales

Phylogeny of Methanosarcinales [8] [9] [10]

Class "Methanomicrobia"

Order Methanomicrobiales

Phylogeny of Methanomicrobiales [8] [9] [10]

Class "Hikarchaeia"

Order "Hikarchaeales"

  • Family "Hikarchaeaceae" Martijn et al. 2020 (MG-IV)

Class "Ordosarchaeia"

Order "Ordosarchaeales"

  • Family "Ordosarchaeaceae" Zhao et al. 2024

Class Halobacteria

Order Halorutilales

  • Family Halorutilaceae Durán-Viseras et al. 2023

Order Halobacteriales

Phylogeny of Halobacteriales [8] [9] [10]
Phylogeny of Natrialbaceae [8] [9] [10]
Phylogeny of Haloferacaceae [8] [9] [10]

See also

References

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