Spirillum ferrugineum Dataset NCBI Taxonomy Classification phylum Pseudomonadota class Betaproteobacteria order Nitrosomonadales family Gallionellaceae genus Gallionella species Gallionella ferruginea Name Homonyms Spirillum ferrugineum "Spirillum ferrugineum" (Ehrenberg 1838) de Toni and Trevisan 1889