prokaryotes - bacteria see Domain Bacteria Woese et al. 1990
   Domain "Bacteria" Woese et al. 1990
     Phylum "Actinobacteria" Garrity and Holt 2001
       Class Coriobacteriia König 2013
         Order Eggerthellales Gupta et al. 2013 [monotypic]
           Family Eggerthellaceae Gupta et al. 2013
             Genus Cryptobacterium Nakazawa et al. 1999