Nitrospina gracilis Watson and Waterbury 1971 Dataset NCBI Taxonomy Classification kingdom Pseudomonadati phylum Nitrospinota class Nitrospinia order Nitrospinales family Nitrospinaceae genus Nitrospina species Nitrospina gracilis Name Homonyms Nitrospina gracilis Nitrospina gracilis Watson and Waterbury 1971