Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Domain Bacteria Woese et al. 1990 [paraphyletic?]
             Superphylum Terrabacteria Battistuzzi et al. 2004
               Phylum Firmicutes corrig. Gibbons and Murray 1978 (Approved Lists 1980)
                 Class Clostridia Rainey 2010
                   Order Thermoanaerobacterales Wiegel 2010
                     Family Thermoanaerobacteraceaeᵀ Wiegel 2010
                       Genus Moorella Collins et al. 1994 nom. illeg.
                         1 Moorella glycerini Slobodkin et al. 1997
                         2 Moorella humiferrea Nepomnyashchaya et al. 2012
                         3 Moorella mulderi Balk et al. 2005
                         4 Moorella stamsii Alves et al. 2013
                         5 Moorella thermoacetica (Fontaine et al. 1942) Collins et al. 1994
                         6 Moorella thermoautotrophica (Wiegel et al. 1982) Collins et al. 1994