Haloferacaceae is a family of halophilic, chemoorganotrophic or heterotrophic archaea within the order Haloferacales. The type genus of this family is Haloferax. Its biochemical characteristics are the same as the order Haloferacales.

The name Haloferacaceae is derived from the Latin term Haloferax, referring to the type genus of the family and the suffix "-ceae", an ending used to denote a family. Together, Haloferacaceae refers to a family whose nomenclatural type is the genus Haloferax.

Taxonomy and molecular signatures

As of 2021, Haloferacaceae contains 10 validly published genera. This family can be molecularly distinguished from other Halobacteria by the presence of five conserved signature proteins (CSPs) and four conserved signature indels (CSIs) present in the following proteins: thermosome, ribonuclease BN and hypothetical proteins.

Phylogeny

The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN) and National Center for Biotechnology Information (NCBI).

16S rRNA based LTP_10_202453 marker proteins based GTDB 10-RS226
Natronoarchaeaceae Halorubraceae Haloparvum Halopenitus Halorubrum Haloferacaceae Salinirubrum Halalkaliarchaeum Halolamina Halobaculum Haloplanus Halalkalirubrum Natronocalculus Halohasta Halonotius Halogranum Halobium Halegenticoccus Haloprofundus Salinigranum Haloferax Halopelagius Halogeometricum Halobellus (incl. Haloquadratum *)Haloferacaceae Salinirubrum corrig. Cui & Qiu 2014 Haloplanus Elevi Bardavid et al. 2007 Halobium Mori et al. 2016 Halegenticoccus Liu et al. 2020 Halogranum Cui et al. 2010 Haloprofundus Zhang et al. 2017 Salinigranum Cui & Zhang 2014 Haloferax Torreblanca et al. 1986 Halopelagius Cui et al. 2010 Halogeometricum Montalvo-Rodriguez et al. 1998 Haloquadratum Burns et al. 2007 Halobellus Cui et al. 2011 Halalkalirubrum Zuo et al. 2022 Natronocalculus Sorokin et al. 2023 Halohasta Mou et al. 2013 Halonotius Burns et al. 2010 Halolamina Cui et al. 2011 Halorarum Tan et al. 2024 [incl. "Ca. Halobonum"] Halobaculum Oren et al. 1995 Halalkaliarchaeum Sorokin et al. 2019 Halopenitus Amoozegar et al. 2012 Haloparvum Chen et al. 2016 Halorubrum McGenity & Grant 1996
Natronoarchaeaceae Halorubraceae Haloparvum Halopenitus Halorubrum
Natronoarchaeaceae
Halorubraceae Haloparvum Halopenitus Halorubrum
HalorubraceaeHaloparvum Halopenitus Halorubrum
Haloparvum
Halopenitus Halorubrum
Halopenitus
Halorubrum
HaloferacaceaeSalinirubrum Halalkaliarchaeum Halolamina Halobaculum Haloplanus Halalkalirubrum Natronocalculus Halohasta Halonotius Halogranum Halobium Halegenticoccus Haloprofundus Salinigranum Haloferax Halopelagius Halogeometricum Halobellus (incl. Haloquadratum *)
Salinirubrum
Halalkaliarchaeum Halolamina Halobaculum Haloplanus Halalkalirubrum Natronocalculus Halohasta Halonotius Halogranum Halobium Halegenticoccus Haloprofundus Salinigranum Haloferax Halopelagius Halogeometricum Halobellus (incl. Haloquadratum *)
Halalkaliarchaeum
Halolamina Halobaculum Haloplanus Halalkalirubrum Natronocalculus Halohasta Halonotius Halogranum Halobium Halegenticoccus Haloprofundus Salinigranum Haloferax Halopelagius Halogeometricum Halobellus (incl. Haloquadratum *)
Halolamina Halobaculum
Halolamina
Halobaculum
Haloplanus Halalkalirubrum Natronocalculus Halohasta Halonotius Halogranum Halobium Halegenticoccus Haloprofundus Salinigranum Haloferax Halopelagius Halogeometricum Halobellus (incl. Haloquadratum *)
Haloplanus
Halalkalirubrum Natronocalculus Halohasta Halonotius Halogranum Halobium Halegenticoccus Haloprofundus Salinigranum Haloferax Halopelagius Halogeometricum Halobellus (incl. Haloquadratum *)
Halalkalirubrum Natronocalculus Halohasta Halonotius Halogranum Halobium Halegenticoccus Haloprofundus
Halalkalirubrum Natronocalculus Halohasta Halonotius
Halalkalirubrum
Natronocalculus Halohasta Halonotius
Natronocalculus
Halohasta Halonotius
Halohasta
Halonotius
Halogranum Halobium Halegenticoccus Haloprofundus
Halogranum
Halobium Halegenticoccus Haloprofundus
Halobium
Halegenticoccus Haloprofundus
Halegenticoccus
Haloprofundus
Salinigranum Haloferax Halopelagius Halogeometricum Halobellus (incl. Haloquadratum *)
Salinigranum
Haloferax Halopelagius Halogeometricum Halobellus (incl. Haloquadratum *)
Haloferax
Halopelagius Halogeometricum Halobellus (incl. Haloquadratum *)
Halopelagius
Halogeometricum Halobellus (incl. Haloquadratum *)
Halogeometricum
Halobellus (incl. Haloquadratum *)
HaloferacaceaeSalinirubrum corrig. Cui & Qiu 2014 Haloplanus Elevi Bardavid et al. 2007 Halobium Mori et al. 2016 Halegenticoccus Liu et al. 2020 Halogranum Cui et al. 2010 Haloprofundus Zhang et al. 2017 Salinigranum Cui & Zhang 2014 Haloferax Torreblanca et al. 1986 Halopelagius Cui et al. 2010 Halogeometricum Montalvo-Rodriguez et al. 1998 Haloquadratum Burns et al. 2007 Halobellus Cui et al. 2011 Halalkalirubrum Zuo et al. 2022 Natronocalculus Sorokin et al. 2023 Halohasta Mou et al. 2013 Halonotius Burns et al. 2010 Halolamina Cui et al. 2011 Halorarum Tan et al. 2024 [incl. "Ca. Halobonum"] Halobaculum Oren et al. 1995 Halalkaliarchaeum Sorokin et al. 2019 Halopenitus Amoozegar et al. 2012 Haloparvum Chen et al. 2016 Halorubrum McGenity & Grant 1996
Salinirubrum corrig. Cui & Qiu 2014
Haloplanus Elevi Bardavid et al. 2007 Halobium Mori et al. 2016 Halegenticoccus Liu et al. 2020 Halogranum Cui et al. 2010 Haloprofundus Zhang et al. 2017 Salinigranum Cui & Zhang 2014 Haloferax Torreblanca et al. 1986 Halopelagius Cui et al. 2010 Halogeometricum Montalvo-Rodriguez et al. 1998 Haloquadratum Burns et al. 2007 Halobellus Cui et al. 2011 Halalkalirubrum Zuo et al. 2022 Natronocalculus Sorokin et al. 2023 Halohasta Mou et al. 2013 Halonotius Burns et al. 2010 Halolamina Cui et al. 2011 Halorarum Tan et al. 2024 [incl. "Ca. Halobonum"] Halobaculum Oren et al. 1995 Halalkaliarchaeum Sorokin et al. 2019 Halopenitus Amoozegar et al. 2012 Haloparvum Chen et al. 2016 Halorubrum McGenity & Grant 1996
Haloplanus Elevi Bardavid et al. 2007 Halobium Mori et al. 2016 Halegenticoccus Liu et al. 2020 Halogranum Cui et al. 2010 Haloprofundus Zhang et al. 2017 Salinigranum Cui & Zhang 2014 Haloferax Torreblanca et al. 1986 Halopelagius Cui et al. 2010 Halogeometricum Montalvo-Rodriguez et al. 1998 Haloquadratum Burns et al. 2007 Halobellus Cui et al. 2011
Haloplanus Elevi Bardavid et al. 2007
Halobium Mori et al. 2016 Halegenticoccus Liu et al. 2020 Halogranum Cui et al. 2010 Haloprofundus Zhang et al. 2017 Salinigranum Cui & Zhang 2014 Haloferax Torreblanca et al. 1986 Halopelagius Cui et al. 2010 Halogeometricum Montalvo-Rodriguez et al. 1998 Haloquadratum Burns et al. 2007 Halobellus Cui et al. 2011
Halobium Mori et al. 2016 Halegenticoccus Liu et al. 2020 Halogranum Cui et al. 2010 Haloprofundus Zhang et al. 2017
Halobium Mori et al. 2016
Halegenticoccus Liu et al. 2020 Halogranum Cui et al. 2010 Haloprofundus Zhang et al. 2017
Halegenticoccus Liu et al. 2020
Halogranum Cui et al. 2010 Haloprofundus Zhang et al. 2017
Halogranum Cui et al. 2010
Haloprofundus Zhang et al. 2017
Salinigranum Cui & Zhang 2014 Haloferax Torreblanca et al. 1986 Halopelagius Cui et al. 2010 Halogeometricum Montalvo-Rodriguez et al. 1998 Haloquadratum Burns et al. 2007 Halobellus Cui et al. 2011
Salinigranum Cui & Zhang 2014
Haloferax Torreblanca et al. 1986 Halopelagius Cui et al. 2010 Halogeometricum Montalvo-Rodriguez et al. 1998 Haloquadratum Burns et al. 2007 Halobellus Cui et al. 2011
Haloferax Torreblanca et al. 1986
Halopelagius Cui et al. 2010 Halogeometricum Montalvo-Rodriguez et al. 1998 Haloquadratum Burns et al. 2007 Halobellus Cui et al. 2011
Halopelagius Cui et al. 2010
Halogeometricum Montalvo-Rodriguez et al. 1998 Haloquadratum Burns et al. 2007 Halobellus Cui et al. 2011
Halogeometricum Montalvo-Rodriguez et al. 1998
Haloquadratum Burns et al. 2007 Halobellus Cui et al. 2011
Haloquadratum Burns et al. 2007
Halobellus Cui et al. 2011
Halalkalirubrum Zuo et al. 2022 Natronocalculus Sorokin et al. 2023 Halohasta Mou et al. 2013 Halonotius Burns et al. 2010 Halolamina Cui et al. 2011 Halorarum Tan et al. 2024 [incl. "Ca. Halobonum"] Halobaculum Oren et al. 1995 Halalkaliarchaeum Sorokin et al. 2019 Halopenitus Amoozegar et al. 2012 Haloparvum Chen et al. 2016 Halorubrum McGenity & Grant 1996
Halalkalirubrum Zuo et al. 2022 Natronocalculus Sorokin et al. 2023 Halohasta Mou et al. 2013 Halonotius Burns et al. 2010
Halalkalirubrum Zuo et al. 2022 Natronocalculus Sorokin et al. 2023
Halalkalirubrum Zuo et al. 2022
Natronocalculus Sorokin et al. 2023
Halohasta Mou et al. 2013 Halonotius Burns et al. 2010
Halohasta Mou et al. 2013
Halonotius Burns et al. 2010
Halolamina Cui et al. 2011 Halorarum Tan et al. 2024 [incl. "Ca. Halobonum"] Halobaculum Oren et al. 1995 Halalkaliarchaeum Sorokin et al. 2019 Halopenitus Amoozegar et al. 2012 Haloparvum Chen et al. 2016 Halorubrum McGenity & Grant 1996
Halolamina Cui et al. 2011 Halorarum Tan et al. 2024 [incl. "Ca. Halobonum"] Halobaculum Oren et al. 1995
Halolamina Cui et al. 2011
Halorarum Tan et al. 2024 [incl. "Ca. Halobonum"] Halobaculum Oren et al. 1995
Halorarum Tan et al. 2024 [incl. "Ca. Halobonum"]
Halobaculum Oren et al. 1995
Halalkaliarchaeum Sorokin et al. 2019 Halopenitus Amoozegar et al. 2012 Haloparvum Chen et al. 2016 Halorubrum McGenity & Grant 1996
Halalkaliarchaeum Sorokin et al. 2019
Halopenitus Amoozegar et al. 2012 Haloparvum Chen et al. 2016 Halorubrum McGenity & Grant 1996
Halopenitus Amoozegar et al. 2012
Haloparvum Chen et al. 2016 Halorubrum McGenity & Grant 1996
Haloparvum Chen et al. 2016
Halorubrum McGenity & Grant 1996

Unassigned Haloferacaceae:

  • "Candidatus Halectosymbiota" corrig. Filker et al. 2014
  • Salinirarus Zhang et al. 2025

See also