prokaryotes - bacteria see Domain Bacteria Woese et al. 1990 Domain "Bacteria" Woese et al. 1990 Phylum "Chloroflexi" Garrity and Holt 2001 Class Thermomicrobia Garrity and Holt 2002 [monotypic] Subclass Sphaerobacteridae Stackebrandt et al. 1997 1 Order Sphaerobacterales Stackebrandt et al. 1997 [monotypic] 2 Order Thermomicrobiales Garrity and Holt 2002 [monotypic]