Borrarchaeia

Borrarchaeia
Scientific classification
Domain:	Archaea
Kingdom:	Promethearchaeati
Phylum:	Promethearchaeota
Class:	"Borrarchaeia" Liu et al., 2021
Orders
"Sifarchaeales" "Borrarchaeales"
Synonyms
"Sifarchaeia" Sun et al., 2021

Borrarchaeia (or Sifarchaeia) is a class of Asgard archaea.

Classification

Phylogeny of Asgard archaea (per GTDB release 11-RS232):

Promethearchaeota

	"Asgardarchaeia"

	"Thorarchaeia"

"Atabeyarchaeia"

	"Baldrarchaeia"

	"Jordiarchaeia"

	"Hermodarchaeia"

	"Promethearchaeia"

"Wukongarchaeia"

	"Njordarchaeia"

	"Heimdallarchaeia" (incl. eukaryotes)

Internal taxonomy according to GTDB release 11-RS232 (15th April 2026):

Class "Sifarchaeia" Sun et al., 2021 (syn. "Borrarchaeia" Liu et al., 2021)
- Order "Sifarchaeales" Sun et al., 2021
  - Family "Sifarchaeaceae" Sun et al., 2021
    - Genus "Ca. Sifarchaeum" corrig. Farag et al. 2021
      - Species "Ca. S. subterraneum" corrig. Farag et al. 2021
- Order "Borrarchaeales" Liu et al., 2021
  - Family "Borrarchaeaceae" Liu et al., 2021
    - Genus "Ca. Borrarchaeum" Liu et al., 2021
      - Species "Ca. B. weybense" Sun et al., 2021
      - Species "Ca. B. yapensis" (syn. "Ca. Borrarchaeum yapense" corrig. Liu et al. 2021)
      - Species "Ca. B. marinoarchaea" (syn. "Ca. Sifarchaeum marinarchaeum" corrig. Farag et al. 2021)

References

↑ "GTDB release 11-RS232". Genome Taxonomy Database.
↑ "GTDB Taxonomy tree". Genome Taxonomy Database.
↑ "Species "Candidatus Borrarchaeum yapense"". LPSN.dsmz.de.
↑ "Species "Candidatus Sifarchaeum marinarchaeum"". LPSN.dsmz.de.

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