ArticleExtremophiles : life under extreme conditions2026
Halovenus anhuiensis sp. nov. and Natronomonas salinimetallica sp. nov., two extremely halophilic archaeon isolated from a salt mine.
Article in Extremophiles : life under extreme conditions, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- Validation List no. 230: valid publication of new names and new combinations effectively published outside theInternational journal of systematic and evolutionary microbiology · 2026Article
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Abstract
Two extremely halophilic archaeal strains, HT40T and LN261T, were isolated from salt crystal samples collected from the Dingyuan Salt Mine in Anhui, China. Strain HT40T was found to possess two copies of the 16 S rRNA gene (rrnA and rrnB), while only one copy was detected in strain LN261T. Phylogenetic analysis based on the 16 S rRNA gene sequences revealed that the rrnA and rrnB genes of HT40T showed high sequence similarities with Halovenus aranensis EB27T (94.73%) and Halovenus carboxidivorans WSH3T (97.42%), respectively. Strain LN261T was clustered with Natronomonas aquatica F2–12T, exhibiting 98.50% sequence similarity. Comparative genomic analysis demonstrated that the average nucleotide identity (ANI), digital DNA–DNA hybridization (dDDH), and average amino acid identity (AAI) values between HT40T and current species of the genus Halovenus ranged from 70.2 to 81.8%, 19.4–25.6%, and 62.2–83.8%, respectively. Similarly, the corresponding values between LN261T and current species of the genus Natronomonas were determined to be 75.0–87.3%, 21.2–38.8%, and 67.7–86.4%, respectively. All these values were significantly lower than the recommended thresholds for prokaryotic species delineation. Physiological and biochemical characterization indicated that the optimal growth conditions for HT40T were observed at 42 °C, 4.5 M NaCl, and pH 8.0, whereas LN261T exhibited optimal growth at 37 °C, 3.9 M NaCl, and pH 7.5. Based on the distinct phenotypic and genomic differences from the relevant species, strains HT40T (= MCCC 4K00167T = KCTC 4325T) and LN261T (= MCCC 4K00169T = CGMCC 1.17294T = KCTC 4321T) were proposed to represent novel species within the genera Halovenus and Natronomonas, respectively, for which the name Halovenus anhuiensis and Natronomonas salinimetallica are proposed.
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