prokaryotes - bacteria see Domain Bacteria Woese et al. 1990
   Domain "Bacteria" Woese et al. 1990
     Phylum "Chloroflexi" Garrity and Holt 2001
       Class Caldilineae Yamada et al. 2006 [monotypic]
         Order Caldilineales Yamada et al. 2006 [monotypic]
           Family Caldilineaceae Yamada et al. 2006
             1 Genus Caldilinea Sekiguchi et al. 2003
             2 Genus Litorilinea Kale et al. 2013