Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Domain Bacteria Woese et al. 2024
             Kingdom Bacillatiᵀ (Gibbons and Murray 1978) Oren and Göker 2024
               Phylum Chloroflexota Garrity and Holt 2021
                 Class Chloroflexiaᵀ corrig. Gupta et al. 2013
                   Order Herpetosiphonales Gupta et al. 2013 [monotypic]
                     Family Herpetosiphonaceaeᵀ Gupta et al. 2013
                       Genus Herpetosiphonᵀ Holt and Lewin 1968 (Approved Lists 1980)
                         1 Herpetosiphon aurantiacusᵀ Holt and Lewin 1968 (Approved Lists 1980)
                         2 Herpetosiphon geysericola (Copeland 1936) Lewin 1970 (Approved Lists 1980)