thiorhodospira thiorhodospira thiorhodospira is a genus of bacteria from the family of ectothiorhodospiraceae with one known species (thiorhodospira sibirica). thiorhodospira scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: chromatiales family: ectothiorhodospiraceae genus: thiorhodospirabryantseva et al. 1999 type species thiorhodospira sibirica species t. sibirica