Aigarchaeota

Proposed archaeal phylum

Aigarchaeota
Scientific classification
Domain:	Archaea
Kingdom:	"Proteoarchaeota"
Superphylum:	TACK
Phylum:	"Aigarchaeota" Nunoura et al. 2011
Order:	"Caldarchaeales" Rinke et al. 2020^[1]
Families
"Caldarchaeaceae" "Wolframiiraptoraceae"

The "Aigarchaeota" are a proposed archaeal phylum of which the main representative is Caldiarchaeum subterraneum.^[2] It is not yet clear if this represents a new phylum or a Nitrososphaerota order, since the genome of Caldiarchaeum subterraneum encodes several Nitrososphaerota-like features.^[3] The name "Aigarchaeota" comes from the Greek αυγή, avgí, meaning "dawn" or "aurora", for the intermediate features of hyperthermophilic and mesophilic life during the evolution of its lineage.^[2]

Taxonomy

Phylogeny of Caldarchaeales^[4]^[5]^[6]

"Caldarchaeaceae"

	"Ca. Caldarchaeum subterraneum"

	"Ca. Calditenuis aerorheumatis"

"Wolframiiraptoraceae"

"Ca. Terraquivivens"

	"Ca. T. ruidianensis"

	"Ca. T. tikiterensis"

	"Ca. T. tengchongensis"

	"Ca. T. yellowstonensis"

"Ca. Geocrenenecus"

"Ca. G. dongiae"

	"Ca. G. arthurdayi"

	"Ca. G. huangii"

"Ca. Benthortus lauensis"

"Ca. Wolframiiraptor"

"Ca. W. sinensis"

	"Ca. W. allenii"

	"Ca. W. gerlachensis"

Family "Caldarchaeaceae" Rinke et al. 2020
- Genus "Candidatus Caldarchaeum" corrig. Nunoura et al. 2011^[7]^[8]
  - "Ca. C. subterraneum" corrig. Nunoura et al. 2011
- Genus "Candidatus Calditenuis" Beam et al. 2016
  - "Ca. C. aerorheumensis" Beam et al. 2016
Family "Wolframiiraptoraceae" Buessecker et al. 2022
- Genus "Candidatus Benthortus" Buessecker et al. 2022
  - "Ca. B. lauensis" Buessecker et al. 2022
- Genus "Candidatus Geocrenenecus" Buessecker et al. 2022
  - "Ca. G. arthurdayi" Buessecker et al. 2022
  - "Ca. G. dongiae" Buessecker et al. 2022
  - "Ca. G. huangii" Buessecker et al. 2022
- Genus "Candidatus Terraquivivens" Buessecker et al. 2022
  - "Ca. T. ruidianensis" Buessecker et al. 2022
  - "Ca. T. tengchongensis" Buessecker et al. 2022
  - "Ca. T. tikiterensis" Buessecker et al. 2022
  - "Ca. T. yellowstonensis" Buessecker et al. 2022
- Genus "Candidatus Wolframiiraptor" Buessecker et al. 2022
  - "Ca. W. allenii" Buessecker et al. 2022
  - "Ca. W. gerlachensis" Buessecker et al. 2022
  - "Ca. W. sinensis" Buessecker et al. 2022

References

^ (2020) Christian Rinke, Maria Chuvochina, Aaron J. Mussig, Pierre-Alain Chaumeil, Adrian A. Davin, David W. Waite, William B Whitman, Donovan H. Parks, Philip Hugenholtz, Resolving widespread incomplete and uneven archaeal classifications based on a rank-normalized genome-based taxonomy
^ ^a ^b Nunoura, T; Takaki, Y; Kakuta, J; Nishi, S; Sugahara, J; Kazama, H; Chee, GJ; Hattori, M; Kanai, A; Atomi, H; Takai, K; Takami, H (April 2011). "Insights into the evolution of Archaea and eukaryotic protein modifier systems revealed by the genome of a novel archaeal group". Nucleic Acids Research. 39 (8): 3204–23. doi:10.1093/nar/gkq1228. PMC 3082918. PMID 21169198..
^ Brochier-Armanet, Celine; Forterre, Patrick; Gribaldo, Simonetta (June 2011). "Phylogeny and evolution of the Archaea: One hundred genomes later". Current Opinion in Microbiology. 14 (3): 274–281. doi:10.1016/j.mib.2011.04.015. PMID 21632276..
^ "GTDB release 08-RS214". Genome Taxonomy Database. Retrieved 10 May 2023.
^ "ar53_r214.sp_label". Genome Taxonomy Database. Retrieved 10 May 2023.
^ "Taxon History". Genome Taxonomy Database. Retrieved 10 May 2023.
^ Sayers; et al. "Thaumarchaeota". National Center for Biotechnology Information (NCBI) taxonomy database. Retrieved 2021-06-05.
^ "GTDB release 06-RS202". Genome Taxonomy Database.

Martijan, Joran; Ettema, Thijs J. G. (February 2013). "From archaeon to eukaryote: the evolutionary dark ages of the eukaryotic cell". Biochemical Society Transactions. 41 (Part 1): 451–457. doi:10.1042/BST20120292. PMID 23356327.
Meng, Jun; Xu, Jun; Qin, Dan; He, Ying; Xiao, Xiang; Wang, Fengping (March 2014). "Genetic and functional properties of uncultivated MCG archaea assessed by metagenome and gene expression analyses". The ISME Journal. 8 (3): 650–659. doi:10.1038/ismej.2013.174. PMC 3930316. PMID 24108328.
Yutin, Natalya; Koonin, Eugene V. (April 2014). "The Dispersed Archaeal Eukaryome and the Complex Archaeal Ancestor of Eukaryotes". Cold Spring Harbor Perspectives in Biology. 6 (4): a016188. doi:10.1101/cshperspect.a016188. PMC 3970416. PMID 24691961.

Prokaryotes: Archaea classification

Domain

Archaea

Bacteria

Eukaryota

(major groups

Excavata

Diaphoretickes

Hacrobia

Cryptista

Rhizaria

Alveolata

Stramenopiles

Plants

Amorphea

Amoebozoa

Opisthokonta

Animals

Fungi)

Euryarchaeota

Hadarchaeota	"Hadarchaeia" "Hadarchaeales" "Persephonarchaeia"
"Hydrothermarchaeota"	"Hydrothermarchaeia" "Hydrothermarchaeles"
"Methanobacteriota"	Methanobacteria Methanobacteriales Methanococci Methanococcales Methanopyri Methanopyrales "Theionarchaeia" Thermococci "Methanofastidiosales" Thermococcales
"Halobacteriota"	Archaeoglobia Archaeoglobales "Mnemosynellales" Halobacteria Halobacteriales "Hikarchaeia" "Hikarchaeales" "Methanocellia" Methanocellales "Methanoliparia" "Methanoliparales" Methanomicrobia Methanomicrobiales Methanonatronarchaeia Methanonatronarchaeales Methanosarcinia Methanosarcinales Methanotrichales "Syntropharchaeia" "Methanophagales" "Syntropharchaeales"
"Thermoplasmatota"	"Izemarchaea" "Thermoprofundales" "Poseidoniia" "Poseidoniales" Thermoplasmata "Aciduliprofundales" "Gimiplasmatales" "Lunaplasmatales" Methanomassiliicoccales "Natronoplasmatales" "Sysuiplasmatales" Thermoplasmatales

DPANN

"Aenigmatarchaeota"
- "Aenigmatarchaeia"
"Altarchaeota"
- "Altarchaeia"
"Iainarchaeota"
- "Iainarchaeia"
"Huberarchaeota"
- "Huberarchaeia"
"Micrarchaeota"
- "Micrarchaeia"
"Nanohalarchaeota"
- "Nanohalarchaeia"
"Nanoarchaeota"
- "Nanoarchaeia"
- "Nanohalobiia"
"Undinarchaeota"
- "Undinarchaeia"

Proteoarchaeota

TACK

Thermoproteota	Korarchaeia "Korarchaeales" Bathyarchaeia "Hecatellales" Nitrososphaeria "Caldarchaeales" Conexivisphaerales "Geothermarchaeales" Nitrososphaerales "Culexarchaeia" "Culexarchaeles" "Methanomethylicia" "Methanomethylicales" "Nezhaarchaeales" Thermoproteia "Gearchaeales" "Marsarchaeales" Sulfolobales Thermoproteales

Asgard

Lokiarchaeota	"Baldrarchaeia" "Freyrarchaeia" "Hermodarchaeia" "Jordarchaeia" "Lokiarchaeia" "Helarchaeales" "Lokiarchaeales" "Sigynarchaeales" Odinarchaeia Thorarchaeia
Heimdallarchaeota	Heimdallarchaeia "Gerdarchaeales" "Heimdallarchaeales" "Hodarchaeales" "Kariarchaeales" "Njordarchaeia" "Sifarchaeia" "Borrarchaeales" "Sifarchaeales" "Wukongarchaeia"

Source:
Alternative views: Wikispecies