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