Domain Bacteria Woese et al. 1990 Phylum Actinobacteria Garrity and Holt 2001 Class Actinobacteria Stackebrandt et al. 1997 Subclass Sphaerobacteridae Stackebrandt et al. 1997 Order Sphaerobacterales Stackebrandt et al. 1997 Suborder "Sphaerobacterineae" Garrity et al., 2003 1 Family Sphaerobacteraceae Stackebrandt et al. 1997