Phylum Chloroflexi Garrity and Holt 2002 stat. inval. see Phylum Chloroflexota Garrity and Holt 2021
   Thermomicrobia Garrity and Holt 2001 nom. inval. see Class Thermomicrobia Garrity and Holt 2002
     Genus Sphaerobacter Demharter et al. 1989
       1 Sphaerobacter thermophilus Demharter et al. 1989