Nitrososphaera
| Nitrososphaera | |
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| Genus: | Nitrososphaera Stieglmeier et al. 2014 |
| Type species | |
| Nitrososphaera viennensis Stieglmeier et al. 2014 | |
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Nitrososphaera is a mesophilic genus of ammonia-oxidizing Crenarchaeota. The first Nitrososphaera organism was discovered in garden soils at the University of Vienna leading to the categorization of a new genus, family, order and class of Archaea. This genus is contains three distinct species: N. viennensis, Ca. N. gargensis, and Ca N. evergladensis. Nitrososphaera are chemolithoautotrophs and have important biogeochemical roles as nitrifying organisms.