Azotobacter nigricans Krasil'nikov 1949 Dataset NCBI Taxonomy Classification phylum Pseudomonadota class Gammaproteobacteria order Pseudomonadales family Pseudomonadaceae genus Azotobacter species Azotobacter nigricans Name Homonyms Azotobacter nigricans Azotobacter nigricans Krasil'nikov 1949