Phylum Chloroflexi Garrity and Holt 2001
   Chloroflexi Castenholz 2001 nom. inval. see Class Chloroflexia Gupta et al. 2013
     Genus Herpetosiphon Holt and Lewin 1968 (Approved Lists 1980)
       Herpetosiphon geysericola (Copeland 1936) Lewin 1970 (Approved Lists 1980)