It includes multiple genera, such as Nitrospira, the largest.

The first member of this phylum, Nitrospira marina, was discovered in 1985.

[2] The second member, Nitrospira moscoviensis, was discovered in 1995.

[3][4] Nitrospirota contains nitrifying taxa which oxidize nitrite to nitrate (nitrite-oxidizing bacteria, NOB[5]) and commamox bacteria Nitrospira inopinata discovered in 2015[6][7] and cultivated in 2017.

Nitrobium" The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LSPN)[15] and the National Center for Biotechnology Information (NCBI).