Haloferacaceae

Haloferacaceae is a family of halophilic, chemoorganotrophic or heterotrophic archaea within the order Haloferacales.^[2][3][4] The type genus of this family is Haloferax.^[1] Its biochemical characteristics are the same as the order Haloferacales.

Haloferacaceae
Haloquadratum walsbyi
Scientific classification
Domain:	Archaea
Kingdom:	Methanobacteriati
Phylum:	Methanobacteriota
Class:	Halobacteria
Order:	Haloferacales
Family:	Haloferacaceae Gupta et al. 2015
Genera[1]
See text
Synonyms
Halorubraceae Gupta et al. 2016

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.^[1] 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.^[2]

Phylogeny

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).^[5]

16S rRNA based LTP_10_2024[6][7][8]

53 marker proteins based GTDB 10-RS226[9][10][11]

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

Unassigned Haloferacaceae:

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

See also

• List of Archaea genera