Haloarculaceae

Haloarculaceae
Scientific classification
Domain:	Archaea
Kingdom:	Methanobacteriati
Phylum:	Methanobacteriota
Class:	Halobacteria
Order:	Halobacteriales
Family:	Haloarculaceae Gupta et al. 2016 [1]
Genera
See text

Haloarculaceae is a family of halophilic and mostly chemoorganotrophic archaea within the order Halobacteriales . ^{[2] [3] [4]} The type genus of this family is Haloarcula. ^[1] Its biochemical characteristics are the same as the order Halobacteriales.

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

Current taxonomy and molecular signatures

As of 2021, Haloarculaceae contains 10 validly published genera. ^[1] This family can be molecularly distinguished from other Halobacteria by the presence of 19 conserved signature proteins (CSPs) and seven conserved signature indels (CSIs) present in the following proteins: acetylglutamate kinase, ribonuclease R, metallo-beta-lactamase, tRNA modifying enzyme, carbamoyl phosphate synthase large subunit and hypothetical proteins. ^[2]

Specific genera

Halocatena

Halocatena is a genus in this family. One of the species, Halocatena halophila (=Actinoarchaeum halophilum), is known for displaying "hyphae and spores" structure akin to the Actinomycetales. ^[5] The operon responsible for such structural differentation appears to be homologous to the Streptomycetes one and can compensate for the deletion of the bacterial version. ^[6]

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). ^[7]

16S rRNA based LTP_10_2024 [8] [9] [10]

53 marker proteins based GTDB 10-RS226 [11] [12] [13]

Halobacteriaceae  * Halanaeroarchaeum Halodesulfurarchaeum Salarchaeum Halocalculus Halarchaeum Halobacterium Halomarina Actinarchaeum corrig. Tang et al. 2024 Halocatena Haloglomus Salinirubellus Halorarius Salella Halosegnis Natronomonas Haloarculaceae Halomicrobium 2 Halovenus * Halosimplex Halomicroarcula 2 (paraphyletic) Haloarcula Halosimplex 2 Halomicrobium (paraphyletic) Halomicroarcula Halorientalis Salinibaculum * Salinirussus Halovenus 2 Halorhabdus Halococcoides Halapricum

Haladaptataceae Halobacteriaceae  * Halanaeroarchaeum Halodesulfurarchaeum Halospeciosus Salarchaeum Halocalculus Halarchaeum Halobacterium Halococcaceae Haloarculaceae Halocatena * Verma et al. 2020 [incl. Actinarchaeumcorrig. Tang et al. 2024] Halomarina * Inoue et al. 2011 Natronomonas * Kamekura et al. 1997 Halorarius Sun et al. 2023 Halosegnis Duran-Viseras et al. 2022 [incl. SalellaDeshmukh & Oren 2023] Salinirubellus * Hou et al. 2018 Haloglomus Duran-Viseras, Sanchez-Porro & Ventosa 2020 Halorientalis Cui et al. 2011 Halapricum Song et al. 2014 Halococcoides Sorokin et al. 2019 Halorhabdus Waino et al. 2000 Salinirussus Cui et al. 2017 Salinibaculum * Han & Cui 2020 Halovenus * Makhdoumi-Kakhki, Amoozegar & Ventosa 2012 Halosimplex Vreeland et al. 2003 Halomicrobium Oren et al. 2002 [incl. HalosiccatusMehrshad et al. 2016] Haloarcula Torreblanca et al. 1986 [incl. HalomicroarculaEchigo et al. 2013] Haloferacaceae

Note: * polyphyletic Halobacteriaceae

See also

• List of Archaea genera

References

1. A.C. Parte; et al. "Haloarculaceae". List of Prokaryotic names with Standing in Nomenclature (LPSN). Retrieved 2025-02-28.
2. Gupta, Radhey S.; Naushad, Sohail; Fabros, Reena; Adeolu, Mobolaji (2016-02-02). "A phylogenomic reappraisal of family-level divisions within the class Halobacteria: proposal to divide the order Halobacteriales into the families Halobacteriaceae, Haloarculaceae fam. nov., and Halococcaceae fam. nov., and the order Haloferacales into the families, Haloferacaceae and Halorubraceae fam nov" . Antonie van Leeuwenhoek. 109 (4): 565–587. doi:10.1007/s10482-016-0660-2. ISSN   0003-6072. PMID   26837779. S2CID   254231068.
3. Grant, William D.; Kamekura, Masahiro; McGenity, Terry J.; Ventosa, Antonio (2015-09-14). "Halobacteria class. nov" . Bergey's Manual of Systematics of Archaea and Bacteria: 1. doi:10.1002/9781118960608.cbm00026. ISBN   9781118960608.
4. Oren, Aharon (2012-02-01). "Taxonomy of the family Halobacteriaceae: a paradigm for changing concepts in prokaryote systematics". International Journal of Systematic and Evolutionary Microbiology. 62 (2): 263–271. doi: 10.1099/ijs.0.038653-0 . ISSN   1466-5026. PMID   22155757.
5. Zhu, LR; Mao, YL; Hu, Y; Sun, YP; Hou, J; Cui, HL (May 2025). "Genome-based taxonomy of the family Haloarculaceae, proposal of Natronomonadaceae fam. nov., and description of four novel halophilic archaea from two saline lakes and a marine solar saltern". Systematic and applied microbiology. 48 (3): 126592. doi:10.1016/j.syapm.2025.126592. PMID   40036997.
6. Tang, Shu-Kun; Zhi, Xiao-Yang; Zhang, Yao; Makarova, Kira S.; Liu, Bing-Bing; Zheng, Guo-Song; Zhang, Zhen-Peng; Zheng, Hua-Jun; Wolf, Yuri I.; Zhao, Yu-Rong; Jiang, Song-Hao; Chen, Xi-Ming; Li, En-Yuan; Zhang, Tao; Chen, Pei-Ru; Feng, Yu-Zhou; Xiang, Ming-Xian; Lin, Zhi-Qian; Shi, Jia-Hui; Chang, Cheng; Zhang, Xue; Li, Rui; Lou, Kai; Wang, Yun; Chang, Lei; Yin, Min; Yang, Ling-Ling; Gao, Hui-Ying; Zhang, Zhong-Kai; Tao, Tian-Shen; Guan, Tong-Wei; He, Fu-Chu; Lu, Yin-Hua; Cui, Heng-Lin; Koonin, Eugene V.; Zhao, Guo-Ping; Xu, Ping (1 April 2023). "Cellular differentiation into hyphae and spores in halophilic archaea". Nature Communications. 14 (1). doi:10.1038/s41467-023-37389-w.
7. C.L. Schoch; et al. "Haloarculaceae". National Center for Biotechnology Information (NCBI) taxonomy database. Retrieved 2025-02-28.
8. "The LTP" . Retrieved 10 December 2024.
9. "LTP_all tree in newick format" . Retrieved 10 December 2024.
10. "LTP_10_2024 Release Notes" (PDF). Retrieved 10 December 2024.
11. "GTDB release 10-RS226". Genome Taxonomy Database . Retrieved 1 May 2025.
12. "ar53_r226.sp_label". Genome Taxonomy Database . Retrieved 1 May 2025.
13. "Taxon History". Genome Taxonomy Database . Retrieved 1 May 2025.