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Nitrospirota is a phylum of bacteria. It includes multiple genera, such as Nitrospira, the largest. The first member of this phylum, Nitrospira marina, was discovered in 1985. The second member, Nitrospira moscoviensis, was discovered in 1995.
Nitrospirota contains nitrifying taxa which oxidize nitrite to nitrate (nitrite-oxidizing bacteria, NOB) and commamox bacteria Nitrospira inopinata discovered in 2015 and cultivated in 2017.
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