Spirillum kriegii Dataset NCBI Taxonomy Rank SPECIES Classification phylum Pseudomonadota class Betaproteobacteria order Nitrosomonadales family Spirillaceae genus Spirillum species Spirillum kriegii Name Synonyms "Spirillum kriegii" Podkopaeva et al. 2006 Homonyms Spirillum kriegii "Spirillum kriegii" Podkopaeva et al. 2006