sphaerobacter sphaerobacter sphaerobacter is a genus of bacteria. when originally described it was placed in its own subclass (spahaerobacteridae) within the class actinomycetota. subsequently, phylogenetic studies have now placed it in its own order sphaerobacterales within the phylum thermomicrobiota. up to now there is only one species of this genus known (sphaerobacter thermophilus). the closest related cultivated organism to s. thermophilus is the thermomicrobium roseum and has an 87% sequence similarity which indicates that s. thermophilus is one of the most isolated bacterial species. sphaerobacter scientific classification domain: bacteria phylum: thermomicrobiota class: thermomicrobia order: sphaerobacteralesstackebrandt et al. 1997 suborder: sphaerobacterineaegarrity et al. 2003 family: sphaerobacteraceaestackebrandt et al. 1997 genus: sphaerobacterdemharter et al. 1989 species: s. thermophilus binomial name sphaerobacter thermophilusdemharter et al. 1989