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 Actinomycetales Buchanan 1917 (Approved Lists 1980)
           Suborder Catenulisporineae Cavaletti et al. 2006
             1 Family Actinospicaceae Cavaletti et al. 2006 [monotypic]
             2 Family Catenulisporaceae Busti et al. 2006 [monotypic]