# List of Archaea genera

This article lists the genera of the Archaea. The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN) and National Center for Biotechnology Information (NCBI). However, in the List provided below, GTDB has precedence unless otherwise noted.

## 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.
Cladogram was taken from the GTDB release 09-RS220 (24th April 2024). The position of clades with a "question mark" are based on the additional phylogeny of the 16S rRNA-based LTP_12_2021 by The All-Species Living Tree Project.
| Archaea "Undinarchaeota" "Huberarchaeaota" "Aenigmarchaeota" "Nanohalarchaeota" Nanobdellota "Altarchaeota" "Iainarchaeota" "Micrarchaeota" Methanobacteriota_A "Hadarchaeota" Methanobacteriota_B "Methanomada" "Hydrothermarchaeota" "Methanobacteriota" "Neoeuryarchaeota" "Thermoplasmatota" "Halobacteriota" "Proteoarchaeota" Promethearchaeati Promethearchaeota Thermoproteati Thermoproteota | Nanobdellati Methanobacteriati |

## Archaea incertae sedis

* Family "Afararchaeaceae" Baker et al. 2024
** ?"Candidatus Afararchaeum" Baker et al. 2024
* Family "Asbonarchaeaceae" Baker et al. 2024
** ?"Candidatus Asbonarchaeum" Baker et al. 2024
* Family "Chewarchaeaceae" Baker et al. 2024
** ?"Candidatus Chewarchaeum" Baker et al. 2024

## Phylum "Microcaldota"
### Class "Microcaldia"
#### Order "Microcaldales"

* Family "Microcaldaceae" Sakai et al. 2022
** ?"Microcaldus" Sakai et al. 2022

## Phylum "Undinarchaeota"
### Class "Undinarchaeia"
#### Order "Undinarchaeales"

* Family "Naiadarchaeaceae" Dombrowski et al. 2020
** "Candidatus Naiadarchaeum" Dombrowski et al. 2020
* Family "Undinarchaeaceae" Dombrowski et al. 2020
** "Candidatus Undinarchaeum" Dombrowski et al. 2020

## Phylum "Altarchaeota"
### Class "Altarchaeia"
#### Order "Altarchaeales"

* Family "Altarchaeaceae" corrig. Probst et al. 2014
** "Candidatus Altarchaeum" corrig. Probst et al. 2014

## Phylum "Iainarchaeota"
### Class "Iainarchaeia"
#### Order "Forterreales"

* Family "Forterreaceae" Pallen, Rodriguez-R & Alikhan 2022
** "Candidatus Forterrea" Probst & Banfield 2017

#### Order "Iainarchaeales"

* Family "Iainarchaeaceae" Rinke et al. 2020
** "Candidatus Iainarchaeum" Rinke et al. 2013

## Phylum "Micrarchaeota"

Phylogeny of Micrarchaeota :
"Norongarragalinales"
"Ca. Norongarragalina"
"Micrarchaeales"
"Micrarchaeaceae"
"Ca. Mancarchaeum"
"Ca. Micrarchaeum"
"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
** "Candidatus Norongarragalina" Vázquez-Campos et al. 2021

#### Order "Micrarchaeales"

* Family "Micrarchaeaceae" Vázquez-Campos et al. 2021
** "Candidatus Mancarchaeum" Golyshina et al. 2017
** "Candidatus Micrarchaeum" Baker et al. 2010

#### Order "Anstonellales"

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

#### Order "Fermentimicrarchaeales"

* Family "Fermentimicrarchaeaceae" Kadnikov et al. 2020 (Sv326)
** "Candidatus Fermentimicrarchaeum" Kadnikov et al. 2020

#### Order "Burarchaeales"

* Family "Burarchaeaceae" Vázquez-Campos et al. 2021
** "Candidatus Burarchaeum" Vázquez-Campos et al. 2021

#### Order "Gugararchaeales"

* Family "Gugararchaeaceae" Vázquez-Campos et al. 2021
** "Candidatus Gugararchaeum" Vázquez-Campos et al. 2021

## Phylum "Huberarchaeaota"
### Class "Huberarchaeia"
#### Order "Huberarchaeales"

* Family "Huberarchaeaceae" Rinke et al. 2020
** "Candidatus Huberarchaeum" corrig. Schwank et al. 2019

## Phylum "Aenigmatarchaeota"
### Class "Aenigmatarchaeia"
#### Order "Aenigmatarchaeales"

* Family "Aenigmatarchaeaceae" corrig. Rinke et al. 2020
** "Candidatus Aenigmatarchaeum" corrig. Rinke et al. 2013

## Phylum "Nanohalarchaeota"

Phylogeny of Nanohalobiales :
"Nanoanaerosalinaceae"
"Candidatus Nanoanaerosalina"
"Nanohalalkaliarchaeaceae"
"Candidatus Nanohalalkaliarchaeum"
"Nanohalobiaceae"
"Candidatus Nanosalinicola"
"Candidatus Nanosalina"
"Candidatus Nanohalobium" :

### Class "Nanohalarchaeia"
#### Order "Nanohydrothermales"

* Family "Nanohydrothermaceae" Xie et al. 2022
** ?"Candidatus Nanohydrothermus" Xie et al. 2022

#### Order "Nucleotidisoterales"

* Family "Nanosalenecaceae" Xie et al. 2022
** ?"Candidatus Nanosalenecus" Xie et al. 2022
* Family "Nucleotidisoteraceae" Xie et al. 2022
** ?"Candidatus Nucleotidisoter" Xie et al. 2022
* Family "Nucleotidivindicaceae" Xie et al. 2022
** ?"Nucleotidivindex" Xie et al. 2022

#### Order "Nanohalarchaeales"

* Family "Nanohalarchaeaceae"
** ?"Candidatus Nanohalarchaeum" corrig. Hamm et al. 2019
** ?"Candidatus Nanohalococcus occultus" Reva et al. 2023
** ?"Candidatus Nanohalovita haloferacivicina" Reva et al. 2023
** ?"Candidatus Nanopetraeus" corrig. Crits‐Christoph et al. 2016

### Class "Nanohalobiia"
#### Order "Nanohalobiales"

* Family "Nanoanaerosalinaceae" Zhao et al. 2022
** "Candidatus Nanoanaerosalina" Zhao et al. 2022
* Family "Nanohalalkaliarchaeaceae" La Cono et al. 2020
** "Candidatus Nanohalalkaliarchaeum" Ghai et al. 2011
* Family "Nanohalobiaceae" La Cono et al. 2020
** ?"Candidatus Haloredivivus" Ghai et al. 2011
** "Candidatus Nanohalobium" La Cono et al. 2020
** "Candidatus Nanosalina" Narasingarao et al. 2012
** "Candidatus Nanosalinicola" corrig. Narasingarao et al. 2012

## Phylum Nanobdellota

Phylogeny of Nanobdellota :
Nanobdellia
"Pacearchaeales"
"Woesearchaeales"
Nanobdellales
"Nanoarchaeaceae"
"Nanoarchaeum"
Nanobdellaceae
"Ca. Nanoclepta"
Nanobdella
"Ca. Nanopusillus"
"Tiddalikarchaeales"
"Ca. Tiddalikarchaeum"
"Jingweiarchaeales"
"Ca. Jingweiarchaeum"
"JAPDLS01"
"Ca. Haiyanarchaeum"
"Parvarchaeales"
"Ca. Rehaiarchaeum"
"Ca. Acidifodinimicrobium"
"Ca. Parvarchaeum"
"Parvarchaeaceae" :

### Class Nanobdellia
#### Nanobdellia incertae sedis

* "Mamarchaeales"
* "Pacearchaeales" (DHVE-5, DUSEL-1)
* "Wiannamattarchaeales" Vazquez-Campos et al. 2019 (LFWA-II, Eury4AB)
* "Woesearchaeales" (DHVE-6)

#### Order JAPDLS01

* Family "Haiyanarchaeaceae" Rao et al. 2023
** "Candidatus Haiyanarchaeum" Rao et al. 2023

#### Order "Jingweiarchaeales"

* Family "Jingweiarchaeaceae" Rao et al. 2023
** "Candidatus Jingweiarchaeum" Rao et al. 2023

#### Order Nanobdellales

* Family "Nanoarchaeaceae" Huber et al. 2011
** "Nanoarchaeum" Huber et al. 2002
* Family Nanobdellaceae Kato et al. 2022 ["Nanopusillaceae" Huber et al. 2011]
** Nanobdella Kato et al. 2022
** "Candidatus Nanoclepta" St. John et al. 2019
** "Candidatus Nanopusillus" Wurch et al. 2016 ["Candidatus Nanobsidianus" Castelle et al. 2015]

#### Order "Tiddalikarchaeales"

* Family "Tiddalikarchaeaceae" Vázquez-Campos et al. 2021
** "Candidatus Tiddalikarchaeum" Vázquez-Campos et al. 2021

#### Order "Parvarchaeales"

* Family "Parvarchaeaceae" Rinke et al. 2020
** "Candidatus Acidifodinimicrobium" Luo et al. 2020
** "Candidatus Parvarchaeum" Baker et al. 2010 (ARMAN 4 & 5)
** "Candidatus Rehaiarchaeum" Rao et al. 2023

## Phylum Promethearchaeota

Phylogeny of Promethearchaeota :
"Thorarchaeia"
"Thorarchaeales"
"Njordarchaeia"
"Njordarchaeales"
"Sifarchaeia"
"Borrarchaeales"
"Sifarchaeales"
"Wukongarchaeia"
"Wukongarchaeales"
"Heimdallarchaeia"
"Hodarchaeales"
"Gerdarchaeales" (JABLTI01)
"Heimdallarchaeales"
"Odinarchaeia"
"Odinarchaeales"
"Jordarchaeia"
"Jordarchaeales"
"Baldrarchaeia"
"Baldrarchaeales"
"Hermodarchaeia"
"Hermodarchaeales"
Promethearchaeia
"Helarchaeales"
Promethearchaeales :

### Promethearchaeota incertae sedis

* Class "Asgardarchaeia"
** Order "Asgardarchaeales"
*** Family "Asgardarchaeaceae" Eme et al. 2023 ex Tamarit et al. 2024
**** ?"Candidatus Asgardarchaeum" Eme et al. 2023 ex Tamarit et al. 2024
* Class "Balderarchaeia"
** Order "Balderarchaeales"
*** Family "Balderarchaeaceae" (sic) Xie et al. 2022
**** ?"Candidatus Balderarchaeum" (sic) Xie et al. 2022
* Class "Tyrarchaeia"
** Order "Tyrarchaeales"
*** Family "Tyrarchaeaceae" Xie et al. 2022
**** ?"Candidatus Tyrarchaeum" Xie et al. 2022
* Class "Friggarchaeia"
* Class "Gefionarchaeia"
* Class "Idunnarchaeia"

### Class "Thorarchaeia"
#### Order "Thorarchaeales"

* Family "Thorarchaeaceae" (MBG-B)

### Class "Njordarchaeia"
#### Order "Njordarchaeales"

* Family "Njordarchaeaceae" Xie et al. 2022
** "Candidatus Njordarchaeum" Xie et al. 2022

### Class "Sifarchaeia"
#### Order "Borrarchaeales"

* Family "Borrarchaeaceae" Liu et al. 2021
** "Candidatus Borrarchaeum" Liu et al. 2021

#### Order "Sifarchaeales"

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

### Class "Wukongarchaeia"
#### Order "Wukongarchaeales"

* Family "Wukongarchaeaceae" Liu et al. 2021
** "Candidatus Wukongarchaeum" Liu et al. 2021

### Class "Heimdallarchaeia"
#### Order "Hodarchaeales"

* Family "Hodarchaeaceae" Liu et al. 2021
** "Candidatus Hodarchaeum" Liu et al. 2021

#### Order "Heimdallarchaeales"

* Family "Kariarchaeaceae" Liu et al. 2021
** "Candidatus Kariarchaeum" Liu et al. 2021
* Family "Heimdallarchaeaceae" ?Wu et al. 2022
** "Candidatus Heimdallarchaeum" Wu et al. 2022

### Class "Odinarchaeia"
#### Order "Odinarchaeales"

* Family "Odinarchaeaceae" Tamarit et al. 2022
** "Candidatus Odinarchaeum" Tamarit et al. 2022

### Class "Jordarchaeia"
#### Order "Jordarchaeales"

* Family "Freyrarchaeaceae" Xie et al. 2022
** "Candidatus Freyrarchaeum" Xie et al. 2022
* Family "Jordarchaeaceae" Sun et al. 2021
** "Candidatus Jordarchaeum" Sun et al. 2021

### Class "Baldrarchaeia"
#### Order "Baldrarchaeales"

* Family "Baldrarchaeaceae" corrig. Liu et al. 2021
** "Candidatus Baldrarchaeum" corrig. Liu et al. 2021

### Class "Hermodarchaeia"
#### Order "Hermodarchaeales"

* Family "Hermodarchaeaceae" corrig. Liu et al. 2021
** "Candidatus Hermodarchaeum" corrig. Liu et al. 2021

### Class Promethearchaeia
#### Order Promethearchaeales

In GTDB as order CR-4
Phylogeny of Promethearchaeales :
"Sigynarchaeaceae"
"Candidatus Sigynarchaeum"
Promethearchaeaceae
Promethearchaeum
"Candidatus Harpocratesius"
"Candidatus Lokiarchaeum" :
* Family "Sigynarchaeaceae" Xie et al. 2022
** "Candidatus Sigynarchaeum" Xie et al. 2022
* Family Promethearchaeaceae Imachi et al. 2024 ["Lokiarchaeaceae" Vanwonterghem et al. 2016]
** "Candidatus Harpocratesius" Wu et al. 2022
** "Candidatus Lokiarchaeum" corrig. Spang et al. 2015 (MBGB, DSAG)
** Promethearchaeum Imachi et al. 2024

## Phylum Thermoproteota

Phylogeny of Thermoproteota :
JANJXX01
"Panguiarchaeales"
"Korarchaeia"
"Korarchaeales"
"BAT"
"Bathyarchaeia"
"Hecatellales"
"Bathyarchaeales"
Nitrososphaeria_A
"Caldarchaeales"
Nitrososphaeria
"Geothermarchaeales"
Conexivisphaerales
Nitrososphaerales
"Sulfobacteria"
"Methanomethylicia"
"Nezhaarchaeales"
"Culexarchaeles"
"Methanomethylicales"
"Thermoproteia"
"Gearchaeales"
"Thermofilales"
Thermoproteales
"Sulfolobia"
"Marsarchaeales"
Sulfolobales :

### Thermoproteota Incertae sedis

* "Brockarchaeia"

### Class JANJXX01
#### Order "Panguiarchaeales"

* Family "Panguiarchaeaceae" Qu et al. 2023
** "Candidatus Panguiarchaeum" Qu et al. 2023

### Class "Korarchaeia"
#### Order "Korarchaeales"

* Family "Korarchaeaceae" Rinke et al. 2020
** "Candidatus Korarchaeum" Elkins et al. 2008
** "Candidatus Methanodesulfokora" McKay et al. 2019

### Class "Bathyarchaeia"
#### Order "Hecatellales"

* Family "Hecatellaceae" Rinke et al. 2020
** "Candidatus Hecatella" Adam et al. 2022

#### Order "Bathyarchaeales"

* Family "Bathyarchaeaceae" Khomyakova et al. 2023
** "Candidatus Bathyarchaeum" Khomyakova et al. 2023
* Family "Bathycorpusculaceae" Loh & Brune 2023 [UBA233]
** "Candidatus Bathycorpusculum" Loh & Brune 2023

### Class Nitrososphaeria_A
#### Order "Caldarchaeales"

Phylogeny of Nitrososphaeria_A :
"Caldarchaeales"
"Calditenuaceae"
"Ca. Calditenuis"
"Caldarchaeaceae"
"Ca. Caldarchaeum"
"Ca. Pelearchaeum"
"Wolframiiraptoraceae"
"Ca. Terraquivivens"
"Ca. Geocrenenecus"
"Ca. Benthortus"
"Ca. Wolframiiraptor" :
* Family "Calditenuaceae" Balbay et al. 2023
** "Candidatus Calditenuis" Beam et al. 2016
* Family "Caldarchaeaceae" Rinke et al. 2020
** "Candidatus Caldarchaeum" corrig. Nunoura et al. 2011
** "Candidatus Pelearchaeum" Balbay et al. 2023
* Family "Wolframiiraptoraceae" Buessecker et al. 2022
** "Candidatus Benthortus" Buessecker et al. 2022
** "Candidatus Geocrenenecus" Buessecker et al. 2022
** "Candidatus Terraquivivens" Buessecker et al. 2022
** "Candidatus Wolframiiraptor" Buessecker et al. 2022

### Class Nitrososphaeria
#### Nitrososphaeria Incertae sedis

* "Cenoporarchaeum" corrig. Zhang et al. 2019
* "Candidatus Gigantothauma" corrig. Muller et al. 2010
* "Candidatus Nitrosodeserticola" Hwang et al. 2021

#### Order "Geothermarchaeales"

* Family "Geothermarchaeaceae" Adam et al. 2022
** "Candidatus Geothermarchaeum" Adam et al. 2022
** "Candidatus Scotarchaeum" Adam et al. 2022

#### Order "Conexivisphaerales"

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

#### Order Nitrososphaerales

Phylogeny of Nitrososphaerales :
"Nitrosocaldaceae"
"Ca. Nitrosothermus"
"Ca. Nitrosocaldus"
Nitrososphaeraceae
"Ca. Nitrosocosmicus"
"Ca. Nitrosopolaris"
Nitrososphaera
Nitrosopumilaceae
"Ca. Nitrosotalea"
"Ca. Nitrosotenuis"
"Ca. Nitrosopelagicus"
"Cenarchaeum"
Nitrosarchaeum
Nitrosopumilus :
* Family "Methylarchaceae" Hua et al. 2019
** ?"Candidatus Methylarchaeum" Hua et al. 2019
** ?"Candidatus Methanotowutia" Ou et al. 2022
* Family "Nitrosocaldaceae" Qin et al. 2016
** "Candidatus Nitrosocaldus" de la Torre et al. 2008
** "Candidatus Nitrosothermus" Luo et al. 2021
* Family Nitrososphaeraceae Stieglmeier et al. 2014
** "Candidatus Nitrosocosmicus" corrig. Lehtovirta-Morley et al. 2016
** "Candidatus Nitrosopolaris" Pessi, Rutanen & Hultman 2022
** Nitrososphaera Stieglmeier et al. 2014
* Family Nitrosopumilaceae Qin et al. 2017
** "Cenarchaeum" DeLong & Preston 1996
** Nitrosarchaeum corrig. Jung et al. 2018
** ?"Candidatus Candidatus Nitrosoabyssus" Garritano et al. 2024
** ?"Candidatus Candidatus Nitrosokoinonia" Glasl et al. 2023
** ?"Candidatus Candidatus Nitrosomaritimum" Zhao et al. 2024
** "Candidatus Nitrosopelagicus" Santoro et al. 2015
** Nitrosopumilus Qin et al. 2017 ["Candidatus Nitrosomarinus" Ahlgren et al. 2017]
** ?"Candidatus Nitrosospongia" Moeller et al. 2019
** "Candidatus Nitrosotalea" Lehtovirta 2011
** "Candidatus Nitrosotenuis" Lebedeva et al. 2013

### Class "Methanomethylicia"
#### Methanomethylicia incertae sedis

* Order "Methanohydrogenicales"
** Family "Methanohydrogenicaceae" Berghuis et al. 2019
*** ?"Candidatus Methanohydrogenicus" Berghuis et al. 2019
* Order "Methanomethylarchaeales"
** Family "Methanomethylarchaeceae" corrig. Hua et al. 2019
*** ?"Candidatus Methanomethylarchaeum" corrig. Hua et al. 2019
* Order "Methanomethylovorales"
** Family "Methanomethylovoraceae" Hua et al. 2019
*** ?"Candidatus Methanomethylovorus" Hua et al. 2019

#### Order "Nezhaarchaeales"

* Family "Methanohydrogenotrophicaceae" Hua et al. 2019
** ?"Candidatus Methanogearchaeum" corrig. Hua et al. 2019
** ?"Candidatus Methanohydrogenotrophicum" Hua et al. 2019

#### Order "Culexarchaeles"

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

#### Order "Methanomethylicales"

* Family "Candidatus Methanomethylicaceae" corrig. Vanwonterghem et al. 2016
** ?"Candidatus Methanoluiimicrobium" Wu et al. 2024
** "Candidatus Methanomethylicus" Vanwonterghem et al. 2016
** ?"Candidatus Methanostamsia" Wu et al. 2024
** "Candidatus Methanosuratinicola" corrig. Vanwonterghem et al. 2016

### Class Thermoproteia
#### Order "Gearchaeales"

* Family "Gearchaeaceae" corrig.
** ?Geoarchaeum (sic) Hunt et al. 2016

#### Order Thermofilales

* Family Thermofilaceae Burggraf, Huber & Stetter 1997
** Infirmifilum Zayulina et al. 2021
** Thermofilum Zillig & Gierl 1983

#### Order Thermoproteales

Phylogeny of Thermoproteales :
Thermoproteaceae
Thermoproteus
Pyrobaculum
"Thermocladiaceae"
Caldivirga
Thermocladium
Vulcanisaeta :
* Family Thermoproteaceae Zillig & Stetter 1982
** Pyrobaculum Huber, Kristjansson & Stetter 1988
** Thermoproteus Zillig & Stetter 1982
* Family "Thermocladiaceae" Rinke et al. 2020 ex Chuvochina et al. 2023
** Caldivirga Itoh et al. 1999
** Thermocladium Itoh, Suzuki & Nakase 1998
** Vulcanisaeta Itoh, Suzuki & Nakase 2002

### Class "Sulfolobia"
#### Order "Marsarchaeales"

* Family "Marsarchaeaceae"

#### Order Sulfolobales

Phylogeny of Sulfolobales :
Desulfurococcaceae
Staphylothermus
Thermogladius
?Sulfophobococcus
Thermosphaera
Desulfurococcus
Fervidicoccaceae
Fervidicoccus
Pyrodictiaceae
Pyrolobus
Hyperthermus
Pyrodictium
"Ignicoccaceae"
Ignicoccus
Acidilobaceae
?Stetteria
?Thermodiscus
Aeropyrum
Caldisphaera
Acidilobus
"Ignisphaeraceae"
Ignisphaera
"Zestosphaeraceae"
Zestosphaera
Sulfolobaceae
Sulfodiicoccus
Sulfurisphaera
Stygiolobus
Sulfolobus
Sulfuracidifex
Saccharolobus
Metallosphaera
Acidianus brierleyi
"Ca. Aramenus"
Acidianus :
* Family Desulfurococcaceae Zillig & Stetter 1983
** ?Caldococcus Aoshima, Yamagishi & Oshima 1996
** Desulfurococcus Zillig & Stetter 1983
** Staphylothermus Stetter & Fiala 1986
** ?Sulfophobococcus Hensel et al. 1997
** Thermogladius Osburn & Amend 2011 ex Kochetkova et al. 2016
** Thermosphaera Huber et al. 1998
** ?"Candidatus Zestomicrobium" Dzhuraeva, Bobodzhanova & Birkeland 2024
* Family Fervidicoccaceae Perevalova et al. 2010
** Fervidicoccus Perevalova et al. 2010
* Family Pyrodictiaceae Burggraf, Huber & Stetter 1997
** ?Geogemma Kashefi, Holmes & Lovley 2006
** Hyperthermus Zillig, Holz & Wunderl 1991
** Pyrodictium Stetter, König & Stackebrandt 1984
** ?"Pyrofollis" Miyazaki et al. 2023
** Pyrolobus Blochl et al. 1999
* Family "Ignicoccaceae" Rinke et al. 2020 ex Chuvochina et al. 2023
** Ignicoccus Huber, Burggraf & Stetter 2000
* Family Acidilobaceae Prokofeva et al. 2009
** Aeropyrum Sako et al. 1996
** Acidilobus Prokofeva et al. 2000
** Caldisphaera Itoh et al. 2003
** ?"Candidatus Candidatus Calypsonella" St John and Reysenbach 2024
** ?"Candidatus Candidatus Hestiella" St-John and Reysenbach 2024
** ?Stetteria Jochimsen, Peinemann-Simon & Thomm 1998
** ?Thermodiscus Stetter 2003
** ?"Candidatus Candidatus Tiamatella" St John and Reysenbach 2024
* Family "Ignisphaeraceae" Rinke et al. 2020 ex Chuvochina et al. 2023
** Ignisphaera Niederberger et al. 2006
* Family "Zestosphaeraceae" Pallen, Rodriguez-R & Alikhan 2022
** Zestosphaera St. John et al. 2021
* Family Sulfolobaceae Stetter 1989
** Acidianus Segerer et al. 1986 ["Sulfosphaerellus" Zhong et al. 1982; Desulfurolobus Zillig & Böck 1987]
** "Candidatus Aramenus" Servín-Garcidueñas & Martínez-Romero 2014
** Metallosphaera Huber et al. 1989
** Saccharolobus Sakai & Kurosawa 2018
** Stygiolobus Segerer et al. 1991
** Sulfodiicoccus Sakai & Kurosawa 2017
** Sulfolobus Brock et al. 1972
** Sulfuracidifex Itoh et al. 2020
** Sulfurisphaera Kurosawa et al. 1998
** ?Sulfurococcus Golovacheva, Vale’kho & Troitskii 1995

## Phylum Methanobacteriota_A

Phylogeny of Methanobacteriota_A :
Methanococci
Methanocaldococcaceae
Methanocaldococcus
Methanococcaceae
Methanotorris
Methanofervidicoccus
Methanococcus aeolicus
Methanothermococcus okinawensis
Methanothermococcus
Methanococcus
Methanococcales :

### Class "Methanococcia"
#### Order Methanococcales

* Family Methanocaldococcaceae Whitman 2002
** Methanocaldococcus Whitman 2002
* Family Methanococcaceae Balch & Wolfe 1981
** Methanococcus Kluyver & van Niel 1936
** Methanofervidicoccus Sakai et al. 2019
** Methanothermococcus Whitman 2002
** Methanotorris Whitman 2002 ["Methanoignis" Boone, Whitman & Rouviére 1993]

## Phylum "Hadarchaeota"
### Class "Hadarchaeia"
#### Order "Hadarchaeales"

* Family "Cerberiarchaeaceae" Benito Merino et al. 2024
** ?"Candidatus Cerberiarchaeum" Benito Merino et al. 2024
** ?"Candidatus Melinoarchaeum" Yu et al. 2024
* Family "Hadarchaeaceae" Chuvochina et al. 2019 ex Chuvochina et al. 2023
** "Candidatus Hadarchaeum" Chuvochina et al. 2019
** ?"Candidatus Hadesarchaeum" Hua et al. 2019
** ?"Candidatus Methanourarchaeum" Hua et al. 2019

## Phylum Methanobacteriota_B

Phylogeny of Methanobacteriota_B :
Thermococci
"Methanofastidiales"
"Ca. Methanofastidiosum"
"Methanofastidiosaceae"
Thermococcales
Palaeococcus
Thermococcus species-group 3
Thermococcus species-group 2
Pyrococcus
Thermococcus
Thermococcaceae :

### Class Thermococci
#### Order "Methanofastidiosales"

* Family "Methanofastidiosaceae" Rinke et al. 2020
** "Candidatus Methanofastidiosum" corrig. Nobu et al. 2016

#### Order Thermococcales

* Family Thermococcaceae Zillig et al. 1988
** Palaeococcus Takai et al. 2000
** Pyrococcus Fiala & Stetter 1986
** Thermococcus Zillig 1983

## Phylum "Hydrothermarchaeota"
### Class "Hydrothermarchaeia"
#### Order "Hydrothermarchaeales"

* Family BMS3B
** "Candidatus Pyrohabitans" Adam et al. 2022
* Family "Hydrothermarchaeaceae" Chuvochina et al. 2019 ex Chuvochina et al. 2023
** "Candidatus Hydrothermarchaeum" Chuvochina et al. 2019

## Phylum "Methanobacteriota"

Phylogeny of Methanobacteriota :
Methanopyri
Methanopyraceae
Methanopyrus
Methanopyrales
Methanobacteria
Methanothermaceae
Methanothermus
Methanothermobacteraceae_A
Methanothermobacter species-group 2
"Methanothermobacteraceae"
Methanothermobacter
Methanobacteriaceae
"Methanacia"
"Methanoflexus"
"Methanovirga"
"Methanobinarius"
Methanobrevibacter
"Methanarmilla"
"Methanocatella"
Methanobacterium species-group 3
Methanobacterium species-group 2
Methanosphaera
Methanobacterium
Methanobacteriales :

### Class Methanopyri
#### Order Methanopyrales

* Family Methanopyraceae Huber & Stetter 2002
** Methanopyrus Kurr et al. 1992

### Class Methanobacteria
#### Order Methanobacteriales

* Family "Tepidaquicellaceae" corrig. Kadnikov et al. 2020
** ?"Candidatus Tepidaquicella" corrig. Kadnikov et al. 2020
* Family Methanothermaceae Stetter et al. 1982
** Methanothermus Stetter et al. 1982
* Family "Methanothermobacteraceae" Rinke et al. 2020 ex Chuvochina et al. 2023
** Methanothermobacter Wasserfallen et al. 2000
* Family Methanobacteriaceae Barker 1956
** "Methanacia" Protasov & Brune 2023
** "Methanarmilla" Protasov & Brune 2023
** Methanobacterium Kluyver & van Niel 1936
** "Methanobinarius" Protasov & Brune 2023
** Methanobrevibacter Balch & Wolfe 1981
** "Methanocatella" Protasov & Brune 2023
** "Methanoflexus" Protasov & Brune 2023
** Methanosphaera Miller & Wolin 1985
** "Methanovirga" Protasov & Brune 2023

## Phylum Thermoplasmatota

Phylogeny of Thermoplasmatota :
"Izemarchaea"
"Thermoprofundales"
"Poseidoniia"
MGIII
"Poseidoniales"
"Thermoplasmatia"
"Proteinoplasmatales" (SG8-5)
"Yaplasmatales" (RBG-16-68-12)
"Gimiplasmatales" (UBA10834)
"Sysuiplasmatales"
Methanomassiliicoccales
"Halarchaeoplasmatales" (PWKY01)
"Aciduliprofundales"
"Thermoplasmatales" :

### Class "Izemarchaea"
#### Order "Thermoprofundales"

* (MBG-D, E2)

### Class "Poseidoniia"
#### Order "Poseidoniales"

* Family "Poseidoniaceae" corrig. Rinke et al. 2019
** "Candidatus Poseidonia" Rinke et al. 2019
* Family "Thalassarchaeaceae" corrig. Rinke et al. 2019
** "Candidatus Thalassarchaeum" corrig. Martin-Cuadrado et al. 2015

### Class Thermoplasmata
#### Order "Lunaplasmatales"

* Family "Lunaplasmataceae" Zinke et al. 2021
** ?"Candidatus Lunaplasma" Zinke et al. 2021

#### Order "Proteinoplasmatales"

* (SG8-5)

#### Order "Yaplasmatales"

* (RBG-16-68-12)

#### Order "Gimiplasmatales"

* Family "Gimiplasmataceae" Hu et al. 2020
** "Candidatus Gimiplasma" Hu et al. 2020 (UA10834)

#### Order "Sysuiplasmatales"

* Family "Sysuiplasmataceae" Yuan et al. 2021
** "Candidatus Sysuiplasma" Yuan et al. 2021

#### Order Methanomassiliicoccales

Phylogeny of Methanomassiliicoccales :
Methanomassiliicoccaceae
Methanomassiliicoccus
Methanomethylophilaceae
"Candidatus Methanomicula"
"Methanarcanum"
"Methanoprimaticola"
Methanomethylophilus
"Methanogranum"
"Methanoplasma" :
* Family "Methanomixtatrophicaceae" Hua et al. 2019
** ?"Candidatus Methanomixtatrophicum" Hua et al. 2019
* Family Methanomassiliicoccaceae Iino et al. 2013
** Methanomassiliicoccus Dridi et al. 2012
* Family Methanomethylophilaceae Gaci et al. 2014 ex Borrel et al. 2024
** "Methanarcanum" Chibani et al. 2023
** "Methanogranum" Iino et al. 2023
** Methanomethylophilus corrig. Borrel et al. 2024
** "Candidatus Methanomicula" Protasov & Brune 2023
** "Methanoplasma" Lang & Brune 2023
** "Methanoprimaticola" Chibani et al. 2023
** ?"Candidatus Methanospyradousia" Gilroy et al. 2021

#### Order "Halarchaeoplasmatales"

Phylogeny of Halarchaeoplasmatales :
"Candidatus Haladaptiplasma"
"Candidatus Natronoplasma"
"Candidatus Saliniplasma" :
* Family "Halarchaeoplasmataceae" Zhou et al. 2023 (PWKY01)
** "Candidatus Haladaptiplasma" corrig. Zhou et al. 2022
** ?"Candidatus Halarchaeoplasma" Zhou et al. 2023 ["Candidatus Haloplasma" Zhou et al. 2022 non Antunes et al. 2008]
** "Candidatus Natronoplasma" Zhou et al. 2022
** "Candidatus Saliniplasma" Zhou et al. 2022

#### Order "Aciduliprofundales"

* Family "Aciduliprofundaceae" Rinke et al. 2020
** "Aciduliprofundum" Reysenbach et al. 2006 (DHVE2 group)

#### Order Thermoplasmatales

Phylogeny of Thermoplasmatales :
Thermoplasma
Cuniculiplasma
Thermogymnomonas
Picrophilus
Acidiplasma
Ferroplasma :
* Family Thermoplasmataceae Reysenbach 2002
** Acidiplasma Golyshina et al. 2009
** ?"Candidatus Carboxiplasma" Bulaev et al. 2023
** Cuniculiplasma corrig. Golyshina et al. 2016
** Ferroplasma Golyshina et al. 2000
** ?Oxyplasma Golyshina et al. 2024
** Picrophilus Schleper et al. 1996
** ?"Candidatus Scheffleriplasma" Krause et al. 2022
** Thermogymnomonas Itoh, Yoshikawa & Takashina 2007
** Thermoplasma Darland et al. 1970

## Phylum Halobacteriota

Phylogeny of Halobacteriota :
"Methanomicrobia"
Methanomicrobiales
"Methanoliparia"
"Methanoliparales"
"Archaeoglobia"
"Mnemosynellales"
Archaeoglobales
"Syntropharchaeia"
"Syntropharchaeales"
"Alkanophagales"
Methanocellia
Methanocellales
Methanosarcinia
Methanosarcinales_A
"Methanotrichales"
Methanosarcinales
Methanonatronarchaeia
Methanonatronarchaeales
Halobacteria
Halorutilales
Halobacteriales :

### Halobacteriota incertae sedis

* "Candidatus Methanoinsularis" Ou et al. 2022
* "Candidatus Methanoporticola" Ou et al. 2022

#### Order "Methanoflorentales"

* Family "Methanoflorentaceae" Mondav et al. 2014
** "Candidatus Methanoflorens" Mondav et al. 2014

### Class Methanomicrobia
#### Order Methanomicrobiales

Phylogeny of Methanomicrobiales :
Methanocorpusculaceae
Methanocorpusculum
Methanocalculus
"Methanofollaceae"
Methanofollis
Methanospirillaceae
Methanosphaerula
Methanoregula
Methanolinea
"Methanofilum"
Methanospirillum
"Methanoculleaceae"
Methanoculleus
Methanomicrobiaceae
Methanogenium
Methanomicrobium
Methanoplanus
Methanolacinia :
* Family Methanocorpusculaceae Zellner et al. 1989
** Methanocalculus Ollivier et al. 1998
** Methanocorpusculum Zellner et al. 1988
** ?"Methanorbis" Protasov & Brune 2023
* Family "Methanofollaceae" Chuvochina et al. 2023
** Methanofollis Zellner et al. 1999
* Family Methanospirillaceae Boone et al. 2002
** "Methanofilum" Protasov & Brune 2023
** Methanolinea Imachi et al. 2008
** Methanoregula Brauer et al. 2011
** Methanosphaerula Cadillo-Quiroz et al. 2009
** Methanospirillum Ferry, Smith & Wolfe 1974
* Family "Methanoculleaceae" Rinke et al. 2020 ex Chuvochina et al. 2023
** Methanoculleus Maestrojun et al. 1990
* Family Methanomicrobiaceae Balch & Wolfe 1981
** Methanogenium Romesser et al. 1981
** Methanolacinia Zellner et al. 1990
** Methanomicrobium Balch & Wolfe 1981
** Methanoplanus Wildgruber et al. 1984
** ?Methanovulcanius Chien et al. 2023

### Class "Methanoliparia"
#### Order "Methanoliparales"

* Family "Methanoliparaceae" Borrel et al. 2019
** "Candidatus Methanoliparum" Borrel et al. 2019
** "Candidatus Methanolliviera" Borrel et al. 2019

### Class "Archaeoglobia"

Phylogeny of "Archaeoglobia" :
"Mnemosynellales"
"Mnemosynellaceae"
"Candidatus Mnemosynella"
Archaeoglobales
Archaeoglobaceae
Ferroglobus
Geoglobus
Archaeoglobus :

#### Order "Mnemosynellales"

* Family "Mnemosynellaceae" Adam et al. 2022
** "Candidatus Mnemosynella" Adam et al. 2022

#### Order Archaeoglobales

* Family "Allopolytropaceae" corrig. Boyd et al. 2019
** ?"Candidatus Allopolytropus" corrig. Boyd et al. 2019 ["Candidatus Polytropus" Boyd et al. 2019 non Kirsch 1866]
* Family Archaeoglobaceae Huber & Stetter 2002
** Archaeoglobus Stetter 1988
** Ferroglobus Hafenbradl et al. 1997
** Geoglobus Kashefi et al. 2002
** ?"Candidatus Methanoglobus" Buessecker et al. 2023
** ?"Candidatus Methanomixotrophus" corrig. Liu et al. 2021
** ?"Candidatus Methanoproducendum" Hua et al. 2019

### Class "Syntropharchaeia"

Phylogeny of "Syntropharchaeia" :
"Syntropharchaeales"
"Syntropharchaeaceae"
"Candidatus Syntropharchaeum"
"Alkanophagales"
"Alkanophagaceae"
"Candidatus Alkanophaga"
"Methanospiraraceae"
"Candidatus Methanoxibalbensis"
"Candidatus Methanospirare" :

#### Order "Syntropharchaeales"

* Family "Syntropharchaeaceae" corrig. (ANME-2 cluster)
** "Candidatus Syntropharchaeum" corrig. Laso-Perez et al. 2016

#### Order "Alkanophagales"

* Family "Methanophagaceae" Chadwick et al. 2022
** ?"Candidatus Methanoalium" Chadwick et al. 2022
** ?"Candidatus Methanophaga" Chadwick et al. 2022
* Family ?"Veteromethanophagaceae" Vulcano et al. 2022
* Family "Alkanophagaceae" [B39-G2]
** "Candidatus Alkanophaga" Zehnle et al. 2023
* Family "Methanospiraraceae" Laso-Pérez et al. 2022
** "Candidatus Methanoxibalbensis" Laso-Pérez et al. 2022
** "Candidatus Methanospirare" Laso-Pérez et al. 2022

### Class Methanocellia
#### Order Methanocellales

* Family Methanocellaceae Sakai et al. 2008
** Methanocella Sakai et al. 2008
** ?Methanooceanicella Zhang et al. 2024

### Class Methanosarcinia
#### Order Methanosarcinales_A

* Family Methermicoccaceae Cheng et al. 2007
** Methermicoccus Cheng et al. 2007

#### Order Methanotrichales

* Family Methanotrichaceae Akinyemi et al. 2021
** "Candidatus Methanocrinis" Khomyakova et al. 2023
** Methanothrix Huser, Wuhrmann & Zehnder 1983 [Methanosaeta Patel & Sprott 1990]

#### Order Methanosarcinales

Phylogeny of Methanosarcinales :
"Methanocomedentaceae"
"Ca. Methanocomedens"
"Ca. Methanomarinus"
"Ethanoperedentaceae"
"Ca. Ethaniperedens"
"Methanoperedentaceae"
"Ca. Methanoperedens"
"Methanogastraceae"
"Ca. Methanogaster"
Methanosarcinaceae
Methanimicrococcus
Methanosarcina
Methanohalobium
Methanosalsum
Methanococcoides
Methanohalophilus
Methanomethylovorans
Methanolobus :
* Family "Methanocomedentaceae" corrig. Chadwick et al. 2022
** "Candidatus Methanocomedens" Chadwick et al. 2022 (ANME-2a)
** "Candidatus Methanomarinus" Chadwick et al. 2022 (ANME-2b)
* Family "Ethanoperedentaceae" (sic) Pallen, Rodriguez-R & Alikhan 2022 (EX4572-44)
** "Candidatus Ethaniperedens" corrig. Hahn et al. 2020
* Family "Methanoperedentaceae" corrig. Haroon et al. 2013
** "Candidatus Methanoperedens" Haroon et al. 2013 (ANME-2d, AAA)
* Family "Methanogastraceae" corrig. Chadwick et al. 2022 (ANME-2c)
** "Candidatus Methanogaster" Chadwick et al. 2022
* Family Methanosarcinaceae Balch & Wolfe 1981
** ?Halomethanococcus Yu & Kawamura 1988
** Methanimicrococcus corrig. Sprenger et al. 2000
** Methanococcoides Sowers & Ferry 1985
** Methanohalobium Zhilina & Zavarzin 1988
** Methanohalophilus Paterek & Smith 1988
** ?"Methanolapillus" Protasov & Brune 2023
** Methanolobus König & Stetter 1983
** Methanomethylovorans Lomans et al. 2004
** Methanosalsum Boone & Baker 2002
** Methanosarcina Kluyver & van Niel 1936
** ?"Candidatus Methanovorans" Chadwick et al. 2022 (ANME-3)

### Class "Methanonatronarchaeia"
#### Order "Methanonatronarchaeales"

* Family Methanonatronarchaeaceae Sorokin et al. 2018
** "Candidatus Methanohalarchaeum" Sorokin et al. 2018
** Methanonatronarchaeum Sorokin et al. 2018

### Class "Hikarchaeia"
#### Order "Hikarchaeales"

* Family "Hikarchaeaceae" Martijn et al. 2020 (MG-IV)
** ?"Candidatus Hikarchaeum" Martijn et al. 2020

### Class "Ordosarchaeia"
#### Order "Ordosarchaeales"

* Family "Ordosarchaeaceae" Zhao et al. 2024
** ?"Candidatus Ordosarchaeum" Zhao et al. 2024

### Class Halobacteria
#### Order Halorutilales

* Family Halorutilaceae Durán-Viseras et al. 2023
** Halorutilus Durán-Viseras et al. 2023
Phylogeny of Halobacteriales :
"Salinarchaeaceae"
Salinarchaeum
"Halostellaceae"
Halostella
Natronoarchaeaceae
Natronoarchaeum
Natrialbaceae cont'd
"Halalkalicoccaceae"
Halalkalicoccus
Haladaptataceae
Halorussus
Haladaptatus
Halococcaceae
Halococcus
Haloarculaceae
Halocatena
Halomarina
Natronomonas
Halosegnis
Salinirubellus
Haloglomus
Halorientalis
Halapricum
Halococcoides
Halorhabdus
Salinirussus
Salinibaculum
Halovenus
Halosimplex
Halomicrobium
Halomicroarcula
Haloarcula
Halobacteriaceae
Halanaeroarchaeum
Halodesulfurarchaeum
Salarchaeum
Halocalculus
Halarchaeum
Halobacterium
Haloferacaceae cont'd :

#### Order Halobacteriales

* Halobacteriales incertae sedis
** "Haloalcalophilium" Lizama et al. 2000a
* Family "Salinarchaeaceae"
** Salinarchaeum Cui et al. 2014
* Family "Halostellaceae" Pallen, Rodriguez-R & Alikhan 2022
** Halostella Song et al. 2016
* Family Natronoarchaeaceae Sorokin et al. 2023
** ?"Natranaeroarchaeum" Sorokin et al. 2021
** Natronoarchaeum Shimane et al. 2010
Phylogeny of Natrialbaceae :
Halorubellus
Haloarchaeobius
Halovivax
"Natronobeatus"
Natribaculum
"Salinilacihabitans"
"Natrononativus"
Natronobiforma
Saliphagus
Halostagnicola
Natronococcus
Halopiger goleimassiliensis
Natrarchaeobaculum
Salinadaptatus
Natrarchaeobius
Halosolutus
Halopiger
Halopiger djelfimassiliensis
Natronobacterium
Halobiforma
Natronolimnobius
Natrialba
Natronolimnohabitans
Haloterrigena
Natronorubrum
Natrinema :
* Family Natrialbaceae Gupta et al. 2015
** Haloarchaeobius Makhdoumi-Kakhki et al. 2012
** Halobiforma Hezayen et al. 2002
** ?"Halomontanus" Mao et al. 2024
** Halopiger Gutierrez et al. 2007
** Halorubellus Cui et al. 2014
** Halosolutus Sun et al. 2022
** Halostagnicola Castillo et al. 2006
** Haloterrigena Ventosa et al. 1999
** Halovivax Castillo et al. 2006
** Natrarchaeobaculum Sorokin et al. 2020
** Natrarchaeobius corrig. Sorokin et al. 2020
** Natrialba Kamekura & Dyall-Smith 1996
** Natribaculum Liu et al. 2015 [Halovarius Mehrshad et al. 2015]
** Natronobacterium Tindall et al. 1984
** Natronobiforma Sorokin et al. 2019
** Natronococcus Tindall et al. 1984
** ?"Natronoglomus" Sorokin et al. 2024
** Natronolimnobius Itoh et al. 2005
** Natronolimnohabitans Sorokin et al. 2020
** Natrinema McGenity et al. 1998
** "Natronobeatus" Li et al. 2023
** "Natrononativus" Li et al. 2023
** Natronorubrum Xu et al. 1999
** ?Natronosalvus Tan et al. 2023
** Salinadaptatus Xue et al. 2020
** "Salinilacihabitans" Li et al. 2023
** Saliphagus Yin et al. 2017
* Family "Halalkalicoccaceae"
** Halalkalicoccus Xue et al. 2005
* Family Haladaptataceae Rinke et al. 2020
** Haladaptatus Savage et al. 2007
** ?Halomicrococcus Chen et al. 2020
** Halorussus Cui et al. 2014
* Family Halococcaceae Gupta et al. 2016
** Halococcus Schoop 1935
* Family Haloarculaceae
** Halapricum Song et al. 2014
** Haloarcula Torreblanca et al. 1986
** Halocatena Verma et al. 2020
** Halococcoides Sorokin et al. 2019
** "Haloglomus" Duran-Viseras, Sanchez-Porro & Ventosa 2020
** Halomarina Inoue et al. 2011
** Halomicroarcula Echigo et al. 2013
** Halomicrobium Oren et al. 2002 [Halosiccatus Mehrshad et al. 2016]
** Halorientalis Cui et al. 2011
** Halorhabdus Waino et al. 2000
** Halosegnis Duran-Viseras et al. 2022 ["Halorarius" Sun et al. 2023; Sala Song et al. 2023 non Ross 1937 non Walker 1867; Salella Deshmukh & Oren 2023]
** Halosimplex Vreeland et al. 2003
** Halovenus Makhdoumi-Kakhki et al. 2012
** Natronomonas Kamekura et al. 1997
** Salinibaculum Han & Cui 2020
** Salinirubellus Hou et al. 2018
** Salinirussus Cui et al. 2017
* Family Halobacteriaceae
** ?Actinoarchaeum Tang et al. 2024
** Halanaeroarchaeum Sorokin et al. 2016
** Halarchaeum Minegishi et al. 2010
** Halobacterium (Elazari-Volcani 1940) Elazari-Volcani 1957 ["Halobacter" Anderson 1954]
** Halocalculus Minegishi et al. 2015
** Halodesulfurarchaeum Sorokin et al. 2017
** ?Halospeciosus Li et al. 2024
** Salarchaeum Shimane et al. 2011
Phylogeny of Haloferacaceae :
Salinirubrum
Haloplanus
Halobium
Halogranum
"Halegenticoccus"
Haloprofundus
Salinigranum
Haloferax
Halopelagius
Halogeometricum
Haloquadratum
Halobellus
Halobaculum
Halolamina
Halalkalirubrum
Natronocalculus
Halohasta
Halonotius
Halalkaliarchaeum
Halopenitus
Haloparvum
Halorubrum :
* Family Haloferacaceae Gupta et al. 2015
** Halalkaliarchaeum Sorokin et al. 2019
** "Halalkalirubrum" Zuo et al. 2021
** ?"Candidatus Halectosymbiota" corrig. Filker et al. 2014
** "Halegenticoccus" Liu et al. 2019
** Halobaculum Oren et al. 1995 ["Candidatus Halobonum" Ugalde et al. 2013]
** Halobellus Cui et al. 2011
** Halobium Mori et al. 2016
** Haloferax Torreblanca et al. 1986
** Halogeometricum Montalvo-Rodriguez et al. 1998 [Halosarcina Savage et al. 2008]
** Halogranum Cui et al. 2010
** Halohasta Mou et al. 2013
** Halolamina Cui et al. 2011
** Halonotius Burns et al. 2010
** Haloparvum Chen et al. 2016
** Halopelagius Cui et al. 2010
** Halopenitus Amoozegar et al. 2012
** Haloplanus Elevi Bardavid et al. 2007
** Haloprofundus Zhang et al. 2017
** Haloquadratum Burns et al. 2007
** Halorubrum McGenity & Grant 1996 [Halorubrobacterium Kamekura & Dyall-Smith 1996]
** Natronocalculus Sorokin et al. 2023
** ?"Salinirarus marinus" Zhang et al. 2024
** Salinirubrum corrig. Cui & Qiu 2014
** Salinigranum Cui & Zhang 2014