"Nitrosocystis coccoides" Starkey 1948 Dataset NCBI Taxonomy Classification phylum Pseudomonadota class Gammaproteobacteria order Chromatiales family Chromatiaceae genus Nitrosococcus species Nitrosococcus nitrosus Name Homonyms Nitrosocystis coccoides "Nitrosocystis coccoides" Starkey 1948