"Streptothrix fluitans" Migula 1895 Dataset NCBI Taxonomy Classification phylum Pseudomonadota class Betaproteobacteria order Burkholderiales family Sphaerotilaceae genus Sphaerotilus species Sphaerotilus natans Name Homonyms Streptothrix fluitans "Streptothrix fluitans" Migula 1895