prokaryotes - bacteria see Domain Bacteria Woese et al. 1990
   Domain "Bacteria" Woese et al. 1990
     Phylum "Actinobacteria" Garrity and Holt 2001
       Class Actinobacteria Stackebrandt et al. 1997
         Order Micrococcales Prévot 1940 (Approved Lists 1980)
           Family Promicromonosporaceae Rainey et al. 1997
             1 Genus Cellulosimicrobium Schumann et al. 2001
             2 Genus Isoptericola Stackebrandt et al. 2004
             3 Genus Myceligenerans Cui et al. 2004
             4 Genus Promicromonospora Krasil'nikov et al. 1961 (Approved Lists 1980)
             5 Genus Xylanibacterium Rivas et al. 2004
             6 Genus Xylanimicrobium Stackebrandt and Schumann 2004
             7 Genus Xylanimonas Rivas et al. 2003