Phylum Chloroflexi Garrity and Holt 2002 stat. inval. see Phylum Chloroflexota Garrity and Holt 2021
   Chloroflexi "Castenholz 2001" nom. inval. see Class Chloroflexia corrig. Gupta et al. 2013
     Genus Chloroflexus Pierson and Castenholz 1974 (Approved Lists 1980)
       1 Chloroflexus aurantiacus Pierson and Castenholz 1974 (Approved Lists 1980)
       2 Chloroflexus aggregans Hanada et al. 1995