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Halostagnicola larsenii is a non-motile, aerobic, gram-negative, rod shaped archaeon. It is a halophilic, neutrophilic, chemo-organotroph and was isolated from samples taken from a saline lake in China. The etymology of the name comes from hals, halos Greek for salt, stagnum Latin for a piece of standing water, -cola Latin for inhabitant or dweller, and Larsenii named after the Norwegian microbiologist, Helge Larsen, who was a pioneer in research regarding halophiles.