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Scientific classification
Domain: Archaea
Kingdom: Euryarchaeota
Phylum: Euryarchaeota
Class: Halobacteria
Order: Halobacteriales
Family: Halobacteriaceae
Genus: Haloarcula
Binomial name
Torreblanca et al. 1986

In taxonomy, Haloarcula is a genus of the Halobacteriaceae.

Description and significance[edit]

Haloarcula are extreme halophilic archaeons. They are distinguished from other genera in the Halobacteriaceae family by the presence of specific derivatives of TGD-2 polar lipids. There are currently seven recognized species in the genus: H. vallismortis, H. marismortui, H. hispanica, H. japonica, H. argentinensis, H. mukohataei, and H. quadrata. H. quadrata was first isolated when researchers were attempting to culture Haloquadratum walsbyi, a haloarchaeon that was thought to be unculturable until 2004.

Haloarcula grow optimally at 40–45 °C. Growth appears in sheets of 65 cells often in the shape of a square or triangle.


Haloarcula are found in neutral saline environments like salt lakes, marine salterns, and saline soils. Like other members of the Halobacteriaceae family, Haloarcula require at least 1.5 M NaCl for growth, but grow optimally in 2.0 to 4.5 M NaCl.[1]


  1. ^ See the NCBI webpage on Haloarcula. Data extracted from the "NCBI taxonomy resources". National Center for Biotechnology Information. Retrieved 2007-03-19. 

Further reading[edit]

Scientific journals[edit]

  • Oren A, Ventosa A (2000). "International Committee on Systematic Bacteriology Subcommittee on the taxonomy of Halobacteriaceae. Minutes of the meetings, 16 August 1999, Sydney, Australia". Int. J. Syst. Evol. Microbiol. 50: 1405–1407. PMID 10843089. 
  • Torreblanca M, Rodriquez-Valera F, Juez G, Ventosa A, Kamekura M, Kates M (1986). "Classification of non-alkaliphilic halobacteria based on numerical taxonomy and polar lipid composition, and description of Haloarcula gen. nov. and Haloferax gen.nov". Syst. Appl. Microbiol. 8: 89–99. doi:10.1016/s0723-2020(86)80155-2. 

Scientific books[edit]

Scientific databases[edit]

External links[edit]