Procaryotic Genera Domain "Bacteria" Woese et al. 1990 Phylum Fibrobacteres Garrity and Holt 2001 [monotypic] see Phylum Fibrobacteres Garrity and Holt 2012 1 Class "Fibrobacteres" Garrity & Holt, 2012 [monotypic] see Class Fibrobacteria Spain et al. 2012